id sid tid token lemma pos anesthj-39 1 1 anesthesia anesthesia PROPN anesthj-39 1 2 ejournal ejournal ADJ anesthj-39 1 3 volume volume NOUN anesthj-39 1 4 3 3 NUM anesthj-39 1 5 issue issue NOUN anesthj-39 1 6 2 2 NUM anesthj-39 1 7 2015 2015 NUM anesthj-39 1 8 aej aej PROPN anesthj-39 1 9 educated educate VERB anesthj-39 1 10 hand hand NOUN anesthj-39 1 11 publishing publish VERB anesthj-39 1 12 llc llc PROPN anesthj-39 1 13 “ " PUNCT anesthj-39 1 14 the the DET anesthj-39 1 15 science science NOUN anesthj-39 1 16 behind behind ADP anesthj-39 1 17 the the DET anesthj-39 1 18 art art NOUN anesthj-39 1 19 ” " PUNCT anesthj-39 1 20 anesthesia anesthesia PROPN anesthj-39 1 21 ejournal ejournal PROPN anesthj-39 1 22 online online PROPN anesthj-39 1 23 issn issn PROPN anesthj-39 1 24 2333 2333 NUM anesthj-39 1 25 - - SYM anesthj-39 1 26 2611 2611 NUM anesthj-39 1 27 ultrasound ultrasound NOUN anesthj-39 1 28 - - PUNCT anesthj-39 1 29 guided guide VERB anesthj-39 1 30 regional regional ADJ anesthj-39 1 31 anesthesia anesthesia NOUN anesthj-39 1 32 is be AUX anesthj-39 1 33 now now ADV anesthj-39 1 34 recognized recognize VERB anesthj-39 1 35 as as ADP anesthj-39 1 36 the the DET anesthj-39 1 37 evolving evolve VERB anesthj-39 1 38 alternative alternative NOUN anesthj-39 1 39 to to ADP anesthj-39 1 40 standard standard ADJ anesthj-39 1 41 landmark landmark NOUN anesthj-39 1 42 - - PUNCT anesthj-39 1 43 based base VERB anesthj-39 1 44 techniques technique NOUN anesthj-39 1 45 for for ADP anesthj-39 1 46 nerve nerve NOUN anesthj-39 1 47 blockade blockade NOUN anesthj-39 1 48 and and CCONJ anesthj-39 1 49 vascular vascular ADJ anesthj-39 1 50 access access NOUN anesthj-39 1 51 . . PUNCT anesthj-39 2 1 the the DET anesthj-39 2 2 limitations limitation NOUN anesthj-39 2 3 of of ADP anesthj-39 2 4 this this DET anesthj-39 2 5 technique technique NOUN anesthj-39 2 6 begin begin VERB anesthj-39 2 7 to to PART anesthj-39 2 8 be be AUX anesthj-39 2 9 recognized recognize VERB anesthj-39 2 10 , , PUNCT anesthj-39 2 11 however however ADV anesthj-39 2 12 , , PUNCT anesthj-39 2 13 as as SCONJ anesthj-39 2 14 needle needle NOUN anesthj-39 2 15 angles angle NOUN anesthj-39 2 16 increase increase NOUN anesthj-39 2 17 beyond beyond ADP anesthj-39 2 18 30 30 NUM anesthj-39 2 19 degrees degree NOUN anesthj-39 2 20 , , PUNCT anesthj-39 2 21 as as SCONJ anesthj-39 2 22 commonly commonly ADV anesthj-39 2 23 used use VERB anesthj-39 2 24 for for ADP anesthj-39 2 25 deep deep ADJ anesthj-39 2 26 injections injection NOUN anesthj-39 2 27 . . PUNCT anesthj-39 3 1 this this DET anesthj-39 3 2 limitation limitation NOUN anesthj-39 3 3 remains remain VERB anesthj-39 3 4 difficult difficult ADJ anesthj-39 3 5 to to PART anesthj-39 3 6 overcome overcome VERB anesthj-39 3 7 , , PUNCT anesthj-39 3 8 especially especially ADV anesthj-39 3 9 for for ADP anesthj-39 3 10 novice novice NOUN anesthj-39 3 11 users user NOUN anesthj-39 3 12 . . PUNCT anesthj-39 4 1 loss loss NOUN anesthj-39 4 2 of of ADP anesthj-39 4 3 needle needle NOUN anesthj-39 4 4 visibility visibility NOUN anesthj-39 4 5 on on ADP anesthj-39 4 6 the the DET anesthj-39 4 7 monitor monitor NOUN anesthj-39 4 8 screen screen NOUN anesthj-39 4 9 remains remain VERB anesthj-39 4 10 a a DET anesthj-39 4 11 source source NOUN anesthj-39 4 12 of of ADP anesthj-39 4 13 frustration frustration NOUN anesthj-39 4 14 for for ADP anesthj-39 4 15 many many ADJ anesthj-39 4 16 providers provider NOUN anesthj-39 4 17 , , PUNCT anesthj-39 4 18 leaving leave VERB anesthj-39 4 19 them they PRON anesthj-39 4 20 confused confused ADJ anesthj-39 4 21 as as SCONJ anesthj-39 4 22 to to PART anesthj-39 4 23 ultrasound ultrasound VERB anesthj-39 4 24 ’s ’s PART anesthj-39 4 25 true true ADJ anesthj-39 4 26 utility utility NOUN anesthj-39 4 27 . . PUNCT anesthj-39 5 1 this this DET anesthj-39 5 2 article article NOUN anesthj-39 5 3 explores explore VERB anesthj-39 5 4 a a DET anesthj-39 5 5 simple simple ADJ anesthj-39 5 6 , , PUNCT anesthj-39 5 7 reliable reliable ADJ anesthj-39 5 8 technique technique NOUN anesthj-39 5 9 for for ADP anesthj-39 5 10 improved improved ADJ anesthj-39 5 11 needle needle NOUN anesthj-39 5 12 visibility visibility NOUN anesthj-39 5 13 on on ADP anesthj-39 5 14 any any DET anesthj-39 5 15 ultrasound ultrasound NOUN anesthj-39 5 16 machine machine NOUN anesthj-39 5 17 through through ADP anesthj-39 5 18 triangulation triangulation NOUN anesthj-39 5 19 of of ADP anesthj-39 5 20 3 3 NUM anesthj-39 5 21 points point NOUN anesthj-39 5 22 using use VERB anesthj-39 5 23 the the DET anesthj-39 5 24 law law NOUN anesthj-39 5 25 of of ADP anesthj-39 5 26 sines sine NOUN anesthj-39 5 27 . . PUNCT anesthj-39 6 1 the the DET anesthj-39 6 2 three three NUM anesthj-39 6 3 points point NOUN anesthj-39 6 4 of of ADP anesthj-39 6 5 ultrasound ultrasound NOUN anesthj-39 6 6 triangulation triangulation NOUN anesthj-39 6 7 are be AUX anesthj-39 6 8 ( ( PUNCT anesthj-39 6 9 1 1 X anesthj-39 6 10 ) ) PUNCT anesthj-39 6 11 the the DET anesthj-39 6 12 location location NOUN anesthj-39 6 13 of of ADP anesthj-39 6 14 the the DET anesthj-39 6 15 ultrasound ultrasound NOUN anesthj-39 6 16 probe probe NOUN anesthj-39 6 17 , , PUNCT anesthj-39 6 18 ( ( PUNCT anesthj-39 6 19 2 2 X anesthj-39 6 20 ) ) PUNCT anesthj-39 6 21 the the DET anesthj-39 6 22 nerve nerve NOUN anesthj-39 6 23 target target NOUN anesthj-39 6 24 , , PUNCT anesthj-39 6 25 and and CCONJ anesthj-39 6 26 ( ( PUNCT anesthj-39 6 27 3 3 X anesthj-39 6 28 ) ) PUNCT anesthj-39 6 29 the the DET anesthj-39 6 30 site site NOUN anesthj-39 6 31 of of ADP anesthj-39 6 32 needle needle NOUN anesthj-39 6 33 entry entry NOUN anesthj-39 6 34 . . PUNCT anesthj-39 7 1 the the DET anesthj-39 7 2 location location NOUN anesthj-39 7 3 of of ADP anesthj-39 7 4 the the DET anesthj-39 7 5 ultrasound ultrasound NOUN anesthj-39 7 6 probe probe NOUN anesthj-39 7 7 is be AUX anesthj-39 7 8 chosen choose VERB anesthj-39 7 9 by by ADP anesthj-39 7 10 the the DET anesthj-39 7 11 user user NOUN anesthj-39 7 12 and and CCONJ anesthj-39 7 13 the the DET anesthj-39 7 14 depth depth NOUN anesthj-39 7 15 to to ADP anesthj-39 7 16 the the DET anesthj-39 7 17 nerve nerve NOUN anesthj-39 7 18 is be AUX anesthj-39 7 19 displayed display VERB anesthj-39 7 20 by by ADP anesthj-39 7 21 the the DET anesthj-39 7 22 ultrasound ultrasound NOUN anesthj-39 7 23 machine machine NOUN anesthj-39 7 24 . . PUNCT anesthj-39 8 1 the the DET anesthj-39 8 2 third third ADJ anesthj-39 8 3 point point NOUN anesthj-39 8 4 , , PUNCT anesthj-39 8 5 the the DET anesthj-39 8 6 needle needle NOUN anesthj-39 8 7 entry entry NOUN anesthj-39 8 8 site site NOUN anesthj-39 8 9 , , PUNCT anesthj-39 8 10 is be AUX anesthj-39 8 11 based base VERB anesthj-39 8 12 on on ADP anesthj-39 8 13 the the DET anesthj-39 8 14 law law NOUN anesthj-39 8 15 of of ADP anesthj-39 8 16 sines sine NOUN anesthj-39 8 17 to to PART anesthj-39 8 18 ensure ensure VERB anesthj-39 8 19 a a DET anesthj-39 8 20 needle needle NOUN anesthj-39 8 21 entry entry NOUN anesthj-39 8 22 angle angle NOUN anesthj-39 8 23 of of ADP anesthj-39 8 24 less less ADJ anesthj-39 8 25 than than ADP anesthj-39 8 26 30 30 NUM anesthj-39 8 27 degrees degree NOUN anesthj-39 8 28 . . PUNCT anesthj-39 9 1 this this DET anesthj-39 9 2 approach approach NOUN anesthj-39 9 3 can can AUX anesthj-39 9 4 simplify simplify VERB anesthj-39 9 5 a a DET anesthj-39 9 6 challenging challenging ADJ anesthj-39 9 7 aspect aspect NOUN anesthj-39 9 8 of of ADP anesthj-39 9 9 ultrasound ultrasound NOUN anesthj-39 9 10 - - PUNCT anesthj-39 9 11 guided guide VERB anesthj-39 9 12 regional regional ADJ anesthj-39 9 13 techniques technique NOUN anesthj-39 9 14 . . PUNCT anesthj-39 10 1 keywords keyword NOUN anesthj-39 10 2 : : PUNCT anesthj-39 10 3 anesthesiology anesthesiology NOUN anesthj-39 10 4 , , PUNCT anesthj-39 10 5 increased increase VERB anesthj-39 10 6 needle needle NOUN anesthj-39 10 7 visualization visualization NOUN anesthj-39 10 8 under under ADP anesthj-39 10 9 ultrasound ultrasound NOUN anesthj-39 10 10 , , PUNCT anesthj-39 10 11 law law NOUN anesthj-39 10 12 of of ADP anesthj-39 10 13 sines sine NOUN anesthj-39 10 14 , , PUNCT anesthj-39 10 15 needle needle NOUN anesthj-39 10 16 visualization visualization NOUN anesthj-39 10 17 , , PUNCT anesthj-39 10 18 needle needle NOUN anesthj-39 10 19 enhancement enhancement NOUN anesthj-39 10 20 , , PUNCT anesthj-39 10 21 ultrasonography ultrasonography NOUN anesthj-39 10 22 abstract abstract ADJ anesthj-39 10 23 reliable reliable ADJ anesthj-39 10 24 needle needle NOUN anesthj-39 10 25 visualization visualization NOUN anesthj-39 10 26 during during ADP anesthj-39 10 27 ultrasound ultrasound NOUN anesthj-39 10 28 - - PUNCT anesthj-39 10 29 guided guide VERB anesthj-39 10 30 regional regional ADJ anesthj-39 10 31 procedures procedure NOUN anesthj-39 10 32 : : PUNCT anesthj-39 10 33 a a DET anesthj-39 10 34 simple simple ADJ anesthj-39 10 35 solution solution NOUN anesthj-39 10 36 to to ADP anesthj-39 10 37 steep steep ADJ anesthj-39 10 38 - - PUNCT anesthj-39 10 39 angle angle NOUN anesthj-39 10 40 echogenicity echogenicity NOUN anesthj-39 10 41 loss loss NOUN anesthj-39 10 42 based base VERB anesthj-39 10 43 on on ADP anesthj-39 10 44 target target NOUN anesthj-39 10 45 depth depth NOUN anesthj-39 10 46 jonathan jonathan PROPN anesthj-39 10 47 kline kline PROPN anesthj-39 10 48 , , PUNCT anesthj-39 10 49 crna crna PROPN anesthj-39 10 50 , , PUNCT anesthj-39 10 51 msna msna NOUN anesthj-39 10 52 affiliation affiliation NOUN anesthj-39 10 53 : : PUNCT anesthj-39 10 54 director director NOUN anesthj-39 10 55 of of ADP anesthj-39 10 56 education education NOUN anesthj-39 10 57 at at ADP anesthj-39 10 58 twin twin PROPN anesthj-39 10 59 oaks oaks PROPN anesthj-39 10 60 anesthesia anesthesia PROPN anesthj-39 10 61 services services PROPN anesthj-39 10 62 . . PUNCT anesthj-39 11 1 contact contact NOUN anesthj-39 11 2 twinoaksanesthesia@gmail.com twinoaksanesthesia@gmail.com X anesthj-39 12 1 funding funding NOUN anesthj-39 12 2 / / SYM anesthj-39 12 3 conflict conflict NOUN anesthj-39 12 4 of of ADP anesthj-39 12 5 interest interest NOUN anesthj-39 12 6 disclosure disclosure NOUN anesthj-39 12 7 : : PUNCT anesthj-39 12 8 none none NOUN anesthj-39 12 9 introduction introduction NOUN anesthj-39 12 10 ultrasound ultrasound NOUN anesthj-39 12 11 - - PUNCT anesthj-39 12 12 guided guide VERB anesthj-39 12 13 regional regional ADJ anesthj-39 12 14 anesthesia anesthesia NOUN anesthj-39 12 15 is be AUX anesthj-39 12 16 now now ADV anesthj-39 12 17 recognized recognize VERB anesthj-39 12 18 as as ADP anesthj-39 12 19 the the DET anesthj-39 12 20 evolving evolve VERB anesthj-39 12 21 alternative alternative NOUN anesthj-39 12 22 to to ADP anesthj-39 12 23 standard standard ADJ anesthj-39 12 24 landmark landmark NOUN anesthj-39 12 25 - - PUNCT anesthj-39 12 26 based base VERB anesthj-39 12 27 techniques technique NOUN anesthj-39 12 28 for for ADP anesthj-39 12 29 nerve nerve NOUN anesthj-39 12 30 blockade blockade NOUN anesthj-39 12 31 and and CCONJ anesthj-39 12 32 vascular vascular ADJ anesthj-39 12 33 access access NOUN anesthj-39 12 34 . . PUNCT anesthj-39 13 1 since since SCONJ anesthj-39 13 2 the the DET anesthj-39 13 3 first first ADJ anesthj-39 13 4 documented document VERB anesthj-39 13 5 anesthesia anesthesia NOUN anesthj-39 13 6 application application NOUN anesthj-39 13 7 of of ADP anesthj-39 13 8 ultrasound ultrasound NOUN anesthj-39 13 9 in in ADP anesthj-39 13 10 1978 1978 NUM anesthj-39 13 11 by by ADP anesthj-39 13 12 la la PRON anesthj-39 13 13 grange,1 grange,1 NOUN anesthj-39 13 14 techniques technique NOUN anesthj-39 13 15 have have AUX anesthj-39 13 16 improved improve VERB anesthj-39 13 17 and and CCONJ anesthj-39 13 18 clinical clinical ADJ anesthj-39 13 19 use use NOUN anesthj-39 13 20 has have AUX anesthj-39 13 21 increased increase VERB anesthj-39 13 22 . . PUNCT anesthj-39 14 1 ultrasound ultrasound NOUN anesthj-39 14 2 use use NOUN anesthj-39 14 3 has have AUX anesthj-39 14 4 shown show VERB anesthj-39 14 5 increased increase VERB anesthj-39 14 6 success success NOUN anesthj-39 14 7 , , PUNCT anesthj-39 14 8 and and CCONJ anesthj-39 14 9 to to ADP anesthj-39 14 10 some some DET anesthj-39 14 11 extent extent NOUN anesthj-39 14 12 increased increase VERB anesthj-39 14 13 safety safety NOUN anesthj-39 14 14 , , PUNCT anesthj-39 14 15 versus versus ADP anesthj-39 14 16 blind blind ADJ anesthj-39 14 17 techniques.2 techniques.2 NOUN anesthj-39 14 18 it it PRON anesthj-39 14 19 seems seem VERB anesthj-39 14 20 logical logical ADJ anesthj-39 14 21 that that SCONJ anesthj-39 14 22 the the DET anesthj-39 14 23 ability ability NOUN anesthj-39 14 24 to to PART anesthj-39 14 25 actually actually ADV anesthj-39 14 26 visualize visualize VERB anesthj-39 14 27 the the DET anesthj-39 14 28 needle needle NOUN anesthj-39 14 29 during during ADP anesthj-39 14 30 regional regional ADJ anesthj-39 14 31 anesthetic anesthetic ADJ anesthj-39 14 32 placement placement NOUN anesthj-39 14 33 allows allow VERB anesthj-39 14 34 for for ADP anesthj-39 14 35 greater great ADJ anesthj-39 14 36 safety safety NOUN anesthj-39 14 37 and and CCONJ anesthj-39 14 38 success success NOUN anesthj-39 14 39 , , PUNCT anesthj-39 14 40 although although SCONJ anesthj-39 14 41 current current ADJ anesthj-39 14 42 literature literature NOUN anesthj-39 14 43 is be AUX anesthj-39 14 44 slow slow ADJ anesthj-39 14 45 to to PART anesthj-39 14 46 support support VERB anesthj-39 14 47 the the DET anesthj-39 14 48 former former NOUN anesthj-39 14 49 . . PUNCT anesthj-39 15 1 the the DET anesthj-39 15 2 limitations limitation NOUN anesthj-39 15 3 of of ADP anesthj-39 15 4 ultrasound ultrasound NOUN anesthj-39 15 5 - - PUNCT anesthj-39 15 6 guided guide VERB anesthj-39 15 7 regional regional ADJ anesthj-39 15 8 anesthesia anesthesia NOUN anesthj-39 15 9 began begin VERB anesthj-39 15 10 to to PART anesthj-39 15 11 be be AUX anesthj-39 15 12 recognized recognize VERB anesthj-39 15 13 , , PUNCT anesthj-39 15 14 however however ADV anesthj-39 15 15 , , PUNCT anesthj-39 15 16 as as SCONJ anesthj-39 15 17 needle needle NOUN anesthj-39 15 18 angles angle NOUN anesthj-39 15 19 increase increase NOUN anesthj-39 15 20 , , PUNCT anesthj-39 15 21 as as SCONJ anesthj-39 15 22 is be AUX anesthj-39 15 23 common common ADJ anesthj-39 15 24 for for ADP anesthj-39 15 25 deep deep ADJ anesthj-39 15 26 injections injection NOUN anesthj-39 15 27 . . PUNCT anesthj-39 16 1 this this DET anesthj-39 16 2 limitation limitation NOUN anesthj-39 16 3 remains remain VERB anesthj-39 16 4 difficult difficult ADJ anesthj-39 16 5 to to PART anesthj-39 16 6 overcome overcome VERB anesthj-39 16 7 , , PUNCT anesthj-39 16 8 especially especially ADV anesthj-39 16 9 for for ADP anesthj-39 16 10 novice novice NOUN anesthj-39 16 11 users user NOUN anesthj-39 16 12 . . PUNCT anesthj-39 17 1 loss loss NOUN anesthj-39 17 2 of of ADP anesthj-39 17 3 needle needle NOUN anesthj-39 17 4 visibility visibility NOUN anesthj-39 17 5 on on ADP anesthj-39 17 6 the the DET anesthj-39 17 7 monitor monitor NOUN anesthj-39 17 8 screen screen NOUN anesthj-39 17 9 remains remain VERB anesthj-39 17 10 a a DET anesthj-39 17 11 source source NOUN anesthj-39 17 12 of of ADP anesthj-39 17 13 irritation irritation NOUN anesthj-39 17 14 for for ADP anesthj-39 17 15 many many ADJ anesthj-39 17 16 providers provider NOUN anesthj-39 17 17 , , PUNCT anesthj-39 17 18 leaving leave VERB anesthj-39 17 19 them they PRON anesthj-39 17 20 confused confused ADJ anesthj-39 17 21 as as SCONJ anesthj-39 17 22 to to PART anesthj-39 17 23 ultrasound ultrasound VERB anesthj-39 17 24 ’s ’s PART anesthj-39 17 25 true true ADJ anesthj-39 17 26 utility utility NOUN anesthj-39 17 27 . . PUNCT anesthj-39 18 1 if if SCONJ anesthj-39 18 2 the the DET anesthj-39 18 3 angle angle NOUN anesthj-39 18 4 at at ADP anesthj-39 18 5 which which PRON anesthj-39 18 6 the the DET anesthj-39 18 7 ultrasound ultrasound NOUN anesthj-39 18 8 waves wave NOUN anesthj-39 18 9 hit hit VERB anesthj-39 18 10 the the DET anesthj-39 18 11 needle needle NOUN anesthj-39 18 12 shaft shaft NOUN anesthj-39 18 13 is be AUX anesthj-39 18 14 from from ADP anesthj-39 18 15 a a DET anesthj-39 18 16 relatively relatively ADV anesthj-39 18 17 parallel parallel ADJ anesthj-39 18 18 origin origin NOUN anesthj-39 18 19 , , PUNCT anesthj-39 18 20 such such ADJ anesthj-39 18 21 as as ADP anesthj-39 18 22 in in ADP anesthj-39 18 23 shallow shallow ADJ anesthj-39 18 24 injection injection NOUN anesthj-39 18 25 techniques technique NOUN anesthj-39 18 26 , , PUNCT anesthj-39 18 27 the the DET anesthj-39 18 28 needle needle NOUN anesthj-39 18 29 can can AUX anesthj-39 18 30 be be AUX anesthj-39 18 31 displayed display VERB anesthj-39 18 32 as as ADP anesthj-39 18 33 a a DET anesthj-39 18 34 hyperechoic hyperechoic ADJ anesthj-39 18 35 ( ( PUNCT anesthj-39 18 36 bright bright ADJ anesthj-39 18 37 white white ADJ anesthj-39 18 38 ) ) PUNCT anesthj-39 18 39 line line NOUN anesthj-39 18 40 that that PRON anesthj-39 18 41 is be AUX anesthj-39 18 42 easy easy ADJ anesthj-39 18 43 to to PART anesthj-39 18 44 visualize visualize VERB anesthj-39 18 45 . . PUNCT anesthj-39 19 1 as as SCONJ anesthj-39 19 2 the the DET anesthj-39 19 3 angle angle NOUN anesthj-39 19 4 departs depart VERB anesthj-39 19 5 from from ADP anesthj-39 19 6 parallel parallel ADJ anesthj-39 19 7 and and CCONJ anesthj-39 19 8 exceeds exceed VERB anesthj-39 19 9 greater great ADJ anesthj-39 19 10 than than ADP anesthj-39 19 11 about about ADV anesthj-39 19 12 30 30 NUM anesthj-39 19 13 degrees degree NOUN anesthj-39 19 14 , , PUNCT anesthj-39 19 15 the the DET anesthj-39 19 16 ultrasound ultrasound NOUN anesthj-39 19 17 wave wave NOUN anesthj-39 19 18 fails fail VERB anesthj-39 19 19 to to PART anesthj-39 19 20 return return VERB anesthj-39 19 21 to to ADP anesthj-39 19 22 the the DET anesthj-39 19 23 probe probe NOUN anesthj-39 19 24 . . PUNCT anesthj-39 20 1 this this PRON anesthj-39 20 2 reliably reliably ADV anesthj-39 20 3 happens happen VERB anesthj-39 20 4 in in ADP anesthj-39 20 5 all all DET anesthj-39 20 6 ultrasound ultrasound NOUN anesthj-39 20 7 systems system NOUN anesthj-39 20 8 regardless regardless ADV anesthj-39 20 9 of of ADP anesthj-39 20 10 make make NOUN anesthj-39 20 11 or or CCONJ anesthj-39 20 12 manufacturer manufacturer NOUN anesthj-39 20 13 . . PUNCT anesthj-39 21 1 this this PRON anesthj-39 21 2 in in ADP anesthj-39 21 3 essence essence NOUN anesthj-39 21 4 describes describe VERB anesthj-39 21 5 the the DET anesthj-39 21 6 physics physics NOUN anesthj-39 21 7 problem problem NOUN anesthj-39 21 8 associated associate VERB anesthj-39 21 9 with with ADP anesthj-39 21 10 visualization visualization NOUN anesthj-39 21 11 during during ADP anesthj-39 21 12 steep steep ADJ anesthj-39 21 13 needle needle NOUN anesthj-39 21 14 angle angle NOUN anesthj-39 21 15 paths path NOUN anesthj-39 21 16 . . PUNCT anesthj-39 22 1 we we PRON anesthj-39 22 2 sought seek VERB anesthj-39 22 3 a a DET anesthj-39 22 4 simple simple ADJ anesthj-39 22 5 , , PUNCT anesthj-39 22 6 easily easily ADV anesthj-39 22 7 incorporated incorporate VERB anesthj-39 22 8 and and CCONJ anesthj-39 22 9 cost cost NOUN anesthj-39 22 10 - - PUNCT anesthj-39 22 11 effective effective ADJ anesthj-39 22 12 solution solution NOUN anesthj-39 22 13 to to ADP anesthj-39 22 14 this this DET anesthj-39 22 15 problem problem NOUN anesthj-39 22 16 . . PUNCT anesthj-39 23 1 one one NUM anesthj-39 23 2 method method NOUN anesthj-39 23 3 would would AUX anesthj-39 23 4 be be AUX anesthj-39 23 5 to to PART anesthj-39 23 6 add add VERB anesthj-39 23 7 software software NOUN anesthj-39 23 8 to to ADP anesthj-39 23 9 the the DET anesthj-39 23 10 system system NOUN anesthj-39 23 11 allowing allow VERB anesthj-39 23 12 the the DET anesthj-39 23 13 probe probe NOUN anesthj-39 23 14 to to PART anesthj-39 23 15 adjust adjust VERB anesthj-39 23 16 the the DET anesthj-39 23 17 beam beam NOUN anesthj-39 23 18 angle angle NOUN anesthj-39 23 19 to to PART anesthj-39 23 20 compensate compensate VERB anesthj-39 23 21 for for ADP anesthj-39 23 22 needle needle NOUN anesthj-39 23 23 approaches approach NOUN anesthj-39 23 24 greater great ADJ anesthj-39 23 25 than than ADP anesthj-39 23 26 30 30 NUM anesthj-39 23 27 degrees degree NOUN anesthj-39 23 28 . . PUNCT anesthj-39 24 1 another another PRON anesthj-39 24 2 cheaper cheap ADJ anesthj-39 24 3 , , PUNCT anesthj-39 24 4 more more ADV anesthj-39 24 5 reliable reliable ADJ anesthj-39 24 6 , , PUNCT anesthj-39 24 7 and and CCONJ anesthj-39 24 8 less less ADV anesthj-39 24 9 complex complex ADJ anesthj-39 24 10 method method NOUN anesthj-39 24 11 would would AUX anesthj-39 24 12 be be AUX anesthj-39 24 13 to to PART anesthj-39 24 14 simply simply ADV anesthj-39 24 15 adjust adjust VERB anesthj-39 24 16 the the DET anesthj-39 24 17 needle needle NOUN anesthj-39 24 18 angle angle NOUN anesthj-39 24 19 . . PUNCT anesthj-39 25 1 because because SCONJ anesthj-39 25 2 depth depth NOUN anesthj-39 25 3 readings reading NOUN anesthj-39 25 4 are be AUX anesthj-39 25 5 a a DET anesthj-39 25 6 fairly fairly ADV anesthj-39 25 7 standard standard ADJ anesthj-39 25 8 display display NOUN anesthj-39 25 9 in in ADP anesthj-39 25 10 the the DET anesthj-39 25 11 ultrasound ultrasound NOUN anesthj-39 25 12 industry industry NOUN anesthj-39 25 13 , , PUNCT anesthj-39 25 14 we we PRON anesthj-39 25 15 decided decide VERB anesthj-39 25 16 to to PART anesthj-39 25 17 use use VERB anesthj-39 25 18 this this DET anesthj-39 25 19 single single ADJ anesthj-39 25 20 variable variable NOUN anesthj-39 25 21 to to PART anesthj-39 25 22 provide provide VERB anesthj-39 25 23 a a DET anesthj-39 25 24 map map NOUN anesthj-39 25 25 for for ADP anesthj-39 25 26 allowing allow VERB anesthj-39 25 27 increased increase VERB anesthj-39 25 28 needle needle NOUN anesthj-39 25 29 visualization visualization NOUN anesthj-39 25 30 based base VERB anesthj-39 25 31 on on ADP anesthj-39 25 32 this this DET anesthj-39 25 33 piece piece NOUN anesthj-39 25 34 of of ADP anesthj-39 25 35 readable readable ADJ anesthj-39 25 36 information information NOUN anesthj-39 25 37 . . PUNCT anesthj-39 26 1 review review NOUN anesthj-39 26 2 of of ADP anesthj-39 26 3 the the DET anesthj-39 26 4 literature literature NOUN anesthj-39 26 5 a a DET anesthj-39 26 6 current current ADJ anesthj-39 26 7 review review NOUN anesthj-39 26 8 of of ADP anesthj-39 26 9 the the DET anesthj-39 26 10 literature literature NOUN anesthj-39 26 11 was be AUX anesthj-39 26 12 conducted conduct VERB anesthj-39 26 13 by by ADP anesthj-39 26 14 using use VERB anesthj-39 26 15 the the DET anesthj-39 26 16 terms term NOUN anesthj-39 26 17 “ " PUNCT anesthj-39 26 18 increased increase VERB anesthj-39 26 19 needle needle NOUN anesthj-39 26 20 visualization visualization NOUN anesthj-39 26 21 under under ADP anesthj-39 26 22 ultrasound ultrasound NOUN anesthj-39 26 23 , , PUNCT anesthj-39 26 24 ” " PUNCT anesthj-39 26 25 “ " PUNCT anesthj-39 26 26 law law NOUN anesthj-39 26 27 of of ADP anesthj-39 26 28 sines sine NOUN anesthj-39 26 29 , , PUNCT anesthj-39 26 30 ” " PUNCT anesthj-39 26 31 “ " PUNCT anesthj-39 26 32 needle needle NOUN anesthj-39 26 33 visualization visualization NOUN anesthj-39 26 34 , , PUNCT anesthj-39 26 35 ” " PUNCT anesthj-39 26 36 and and CCONJ anesthj-39 26 37 “ " PUNCT anesthj-39 26 38 needle needle NOUN anesthj-39 26 39 enhancement enhancement NOUN anesthj-39 26 40 . . PUNCT anesthj-39 26 41 ” " PUNCT anesthj-39 27 1 the the DET anesthj-39 27 2 ultrasound ultrasound NOUN anesthj-39 27 3 system system NOUN anesthj-39 27 4 processor processor NOUN anesthj-39 27 5 displays display VERB anesthj-39 27 6 a a DET anesthj-39 27 7 needle needle NOUN anesthj-39 27 8 by by ADP anesthj-39 27 9 way way NOUN anesthj-39 27 10 of of ADP anesthj-39 27 11 specular specular ADJ anesthj-39 27 12 reflection reflection NOUN anesthj-39 27 13 . . PUNCT anesthj-39 28 1 chan chan NOUN anesthj-39 28 2 and and CCONJ anesthj-39 28 3 perlas3 perlas3 NOUN anesthj-39 28 4 describe describe VERB anesthj-39 28 5 specular specular ADJ anesthj-39 28 6 reflection reflection NOUN anesthj-39 28 7 as as ADP anesthj-39 28 8 the the DET anesthj-39 28 9 processing processing NOUN anesthj-39 28 10 of of ADP anesthj-39 28 11 ultrasound ultrasound ADJ anesthj-39 28 12 wave wave NOUN anesthj-39 28 13 return return NOUN anesthj-39 28 14 from from ADP anesthj-39 28 15 an an DET anesthj-39 28 16 object object NOUN anesthj-39 28 17 that that PRON anesthj-39 28 18 is be AUX anesthj-39 28 19 long long ADJ anesthj-39 28 20 and and CCONJ anesthj-39 28 21 smooth smooth ADJ anesthj-39 28 22 . . PUNCT anesthj-39 29 1 the the DET anesthj-39 29 2 wave wave NOUN anesthj-39 29 3 return return NOUN anesthj-39 29 4 to to ADP anesthj-39 29 5 the the DET anesthj-39 29 6 probe probe NOUN anesthj-39 29 7 for for ADP anesthj-39 29 8 processing processing NOUN anesthj-39 29 9 is be AUX anesthj-39 29 10 in in ADP anesthj-39 29 11 a a DET anesthj-39 29 12 single single ADJ anesthj-39 29 13 direction direction NOUN anesthj-39 29 14 . . PUNCT anesthj-39 30 1 the the DET anesthj-39 30 2 object object NOUN anesthj-39 30 3 must must AUX anesthj-39 30 4 be be AUX anesthj-39 30 5 in in ADP anesthj-39 30 6 an an DET anesthj-39 30 7 orientation orientation NOUN anesthj-39 30 8 to to ADP anesthj-39 30 9 the the DET anesthj-39 30 10 ultrasound ultrasound NOUN anesthj-39 30 11 beam beam NOUN anesthj-39 30 12 that that PRON anesthj-39 30 13 is be AUX anesthj-39 30 14 relatively relatively ADV anesthj-39 30 15 similar similar ADJ anesthj-39 30 16 to to ADP anesthj-39 30 17 the the DET anesthj-39 30 18 angle angle NOUN anesthj-39 30 19 of of ADP anesthj-39 30 20 origin origin NOUN anesthj-39 30 21 . . PUNCT anesthj-39 31 1 “ " PUNCT anesthj-39 31 2 there there PRON anesthj-39 31 3 is be VERB anesthj-39 31 4 increased increase VERB anesthj-39 31 5 signal signal NOUN anesthj-39 31 6 wave wave NOUN anesthj-39 31 7 return return NOUN anesthj-39 31 8 as as SCONJ anesthj-39 31 9 the the DET anesthj-39 31 10 needle needle NOUN anesthj-39 31 11 is be AUX anesthj-39 31 12 more more ADV anesthj-39 31 13 parallel parallel ADJ anesthj-39 31 14 to to ADP anesthj-39 31 15 the the DET anesthj-39 31 16 ultrasound ultrasound NOUN anesthj-39 31 17 ’s ’s PART anesthj-39 31 18 probe probe NOUN anesthj-39 31 19 face face NOUN anesthj-39 31 20 ” " PUNCT anesthj-39 31 21 . . PUNCT anesthj-39 32 1 this this DET anesthj-39 32 2 orientation orientation NOUN anesthj-39 32 3 ensures ensure VERB anesthj-39 32 4 that that SCONJ anesthj-39 32 5 the the DET anesthj-39 32 6 majority majority NOUN anesthj-39 32 7 of of ADP anesthj-39 32 8 the the DET anesthj-39 32 9 emitted emitted ADJ anesthj-39 32 10 waves wave NOUN anesthj-39 32 11 are be AUX anesthj-39 32 12 received receive VERB anesthj-39 32 13 and and CCONJ anesthj-39 32 14 processed.4 processed.4 VERB anesthj-39 32 15 specular specular ADJ anesthj-39 32 16 reflection reflection NOUN anesthj-39 32 17 differs differ VERB anesthj-39 32 18 greatly greatly ADV anesthj-39 32 19 from from ADP anesthj-39 32 20 what what PRON anesthj-39 32 21 is be AUX anesthj-39 32 22 known know VERB anesthj-39 32 23 as as ADP anesthj-39 32 24 diffuse diffuse NOUN anesthj-39 32 25 reflection reflection NOUN anesthj-39 32 26 . . PUNCT anesthj-39 33 1 chan chan PROPN anesthj-39 33 2 and and CCONJ anesthj-39 33 3 perlas3 perlas3 NOUN anesthj-39 33 4 describe describe VERB anesthj-39 33 5 diffuse diffuse NOUN anesthj-39 33 6 reflection reflection NOUN anesthj-39 33 7 as as ADP anesthj-39 33 8 poor poor ADJ anesthj-39 33 9 return return NOUN anesthj-39 33 10 of of ADP anesthj-39 33 11 ultrasound ultrasound ADJ anesthj-39 33 12 waves wave NOUN anesthj-39 33 13 from from ADP anesthj-39 33 14 an an DET anesthj-39 33 15 object object NOUN anesthj-39 33 16 that that PRON anesthj-39 33 17 is be AUX anesthj-39 33 18 irregular irregular ADJ anesthj-39 33 19 in in ADP anesthj-39 33 20 nature nature NOUN anesthj-39 33 21 or or CCONJ anesthj-39 33 22 has have VERB anesthj-39 33 23 steep steep ADJ anesthj-39 33 24 angles angle NOUN anesthj-39 33 25 . . PUNCT anesthj-39 34 1 steep steep ADJ anesthj-39 34 2 needle needle NOUN anesthj-39 34 3 angles angle NOUN anesthj-39 34 4 encourage encourage VERB anesthj-39 34 5 wave wave NOUN anesthj-39 34 6 refraction refraction NOUN anesthj-39 34 7 , , PUNCT anesthj-39 34 8 or or CCONJ anesthj-39 34 9 diffusion diffusion NOUN anesthj-39 34 10 of of ADP anesthj-39 34 11 ultrasound ultrasound ADJ anesthj-39 34 12 waves wave NOUN anesthj-39 34 13 away away ADV anesthj-39 34 14 from from ADP anesthj-39 34 15 the the DET anesthj-39 34 16 probe probe NOUN anesthj-39 34 17 . . PUNCT anesthj-39 35 1 because because SCONJ anesthj-39 35 2 these these DET anesthj-39 35 3 waves wave NOUN anesthj-39 35 4 fail fail VERB anesthj-39 35 5 to to PART anesthj-39 35 6 return return VERB anesthj-39 35 7 to to ADP anesthj-39 35 8 the the DET anesthj-39 35 9 probe probe NOUN anesthj-39 35 10 , , PUNCT anesthj-39 35 11 less less ADJ anesthj-39 35 12 information information NOUN anesthj-39 35 13     SPACE anesthj-39 35 14 is be AUX anesthj-39 35 15 available available ADJ anesthj-39 35 16 for for ADP anesthj-39 35 17 processing processing NOUN anesthj-39 35 18 , , PUNCT anesthj-39 35 19 thus thus ADV anesthj-39 35 20 resulting result VERB anesthj-39 35 21 in in ADP anesthj-39 35 22 poor poor ADJ anesthj-39 35 23 image image NOUN anesthj-39 35 24 resolution.4 resolution.4 NOUN anesthj-39 35 25     SPACE anesthj-39 35 26 there there PRON anesthj-39 35 27 is be VERB anesthj-39 35 28 a a DET anesthj-39 35 29 unique unique ADJ anesthj-39 35 30 element element NOUN anesthj-39 35 31 in in ADP anesthj-39 35 32 the the DET anesthj-39 35 33 processing processing NOUN anesthj-39 35 34 of of ADP anesthj-39 35 35 hollow hollow ADJ anesthj-39 35 36 needle needle NOUN anesthj-39 35 37 ultrasound ultrasound NOUN anesthj-39 35 38 return return NOUN anesthj-39 35 39 waves wave NOUN anesthj-39 35 40 . . PUNCT anesthj-39 36 1 the the DET anesthj-39 36 2 beam beam NOUN anesthj-39 36 3 strength strength NOUN anesthj-39 36 4 exceeds exceed VERB anesthj-39 36 5 the the DET anesthj-39 36 6 strength strength NOUN anesthj-39 36 7 of of ADP anesthj-39 36 8 the the DET anesthj-39 36 9 needle needle NOUN anesthj-39 36 10 shaft shaft NOUN anesthj-39 36 11 on on ADP anesthj-39 36 12 the the DET anesthj-39 36 13 away away ADJ anesthj-39 36 14 path path NOUN anesthj-39 36 15 but but CCONJ anesthj-39 36 16 not not PART anesthj-39 36 17 on on ADP anesthj-39 36 18 the the DET anesthj-39 36 19 return return NOUN anesthj-39 36 20 path path NOUN anesthj-39 36 21 to to ADP anesthj-39 36 22 the the DET anesthj-39 36 23 probe probe NOUN anesthj-39 36 24 . . PUNCT anesthj-39 37 1 ultrasound ultrasound NOUN anesthj-39 37 2 waves wave NOUN anesthj-39 37 3 become become VERB anesthj-39 37 4 trapped trap VERB anesthj-39 37 5 within within ADP anesthj-39 37 6 the the DET anesthj-39 37 7 lumen luman NOUN anesthj-39 37 8 of of ADP anesthj-39 37 9 the the DET anesthj-39 37 10 needle needle NOUN anesthj-39 37 11 and and CCONJ anesthj-39 37 12 return return VERB anesthj-39 37 13 to to ADP anesthj-39 37 14 the the DET anesthj-39 37 15 probe probe NOUN anesthj-39 37 16 in in ADP anesthj-39 37 17 a a DET anesthj-39 37 18 delayed delay VERB anesthj-39 37 19 fashion fashion NOUN anesthj-39 37 20 . . PUNCT anesthj-39 38 1 the the DET anesthj-39 38 2 delay delay NOUN anesthj-39 38 3 occurs occur VERB anesthj-39 38 4 because because SCONJ anesthj-39 38 5 the the DET anesthj-39 38 6 waves wave NOUN anesthj-39 38 7 easily easily ADV anesthj-39 38 8 penetrate penetrate VERB anesthj-39 38 9 the the DET anesthj-39 38 10 outer outer ADJ anesthj-39 38 11 lumen luman NOUN anesthj-39 38 12 of of ADP anesthj-39 38 13 the the DET anesthj-39 38 14 needle needle NOUN anesthj-39 38 15 on on ADP anesthj-39 38 16 the the DET anesthj-39 38 17 away away ADJ anesthj-39 38 18 path path NOUN anesthj-39 38 19 but but CCONJ anesthj-39 38 20 are be AUX anesthj-39 38 21 reflected reflect VERB anesthj-39 38 22 back back ADV anesthj-39 38 23 to to ADP anesthj-39 38 24 the the DET anesthj-39 38 25 lumen luman NOUN anesthj-39 38 26 multiple multiple ADJ anesthj-39 38 27 times time NOUN anesthj-39 38 28 on on ADP anesthj-39 38 29 the the DET anesthj-39 38 30 return return NOUN anesthj-39 38 31 path path NOUN anesthj-39 38 32 . . PUNCT anesthj-39 39 1 this this PRON anesthj-39 39 2 happens happen VERB anesthj-39 39 3 in in ADP anesthj-39 39 4 a a DET anesthj-39 39 5 repeated repeat VERB anesthj-39 39 6 fashion fashion NOUN anesthj-39 39 7 until until SCONJ anesthj-39 39 8 the the DET anesthj-39 39 9 waves wave NOUN anesthj-39 39 10 manage manage VERB anesthj-39 39 11 to to PART anesthj-39 39 12 penetrate penetrate VERB anesthj-39 39 13 the the DET anesthj-39 39 14 needle needle NOUN anesthj-39 39 15 ’s ’s PART anesthj-39 39 16 superficial superficial ADJ anesthj-39 39 17 wall wall NOUN anesthj-39 39 18 and and CCONJ anesthj-39 39 19 return return VERB anesthj-39 39 20 to to ADP anesthj-39 39 21 the the DET anesthj-39 39 22 probe probe NOUN anesthj-39 39 23 . . PUNCT anesthj-39 40 1 the the DET anesthj-39 40 2 bouncing bounce VERB anesthj-39 40 3 around around ADP anesthj-39 40 4 of of ADP anesthj-39 40 5 these these DET anesthj-39 40 6 waves wave NOUN anesthj-39 40 7 produces produce VERB anesthj-39 40 8 a a DET anesthj-39 40 9 delay delay NOUN anesthj-39 40 10 in in ADP anesthj-39 40 11 the the DET anesthj-39 40 12 return return NOUN anesthj-39 40 13 time time NOUN anesthj-39 40 14 . . PUNCT anesthj-39 41 1 these these DET anesthj-39 41 2 wave wave NOUN anesthj-39 41 3 bursts burst NOUN anesthj-39 41 4 return return VERB anesthj-39 41 5 in in ADP anesthj-39 41 6 a a DET anesthj-39 41 7 staggered staggered ADJ anesthj-39 41 8 fashion fashion NOUN anesthj-39 41 9 , , PUNCT anesthj-39 41 10 producing produce VERB anesthj-39 41 11 an an DET anesthj-39 41 12 image image NOUN anesthj-39 41 13 of of ADP anesthj-39 41 14 a a DET anesthj-39 41 15 repeating repeat VERB anesthj-39 41 16 needle needle NOUN anesthj-39 41 17 on on ADP anesthj-39 41 18 the the DET anesthj-39 41 19 screen screen NOUN anesthj-39 41 20 . . PUNCT anesthj-39 42 1 this this PRON anesthj-39 42 2 was be AUX anesthj-39 42 3 described describe VERB anesthj-39 42 4 by by ADP anesthj-39 42 5 reusz reusz PROPN anesthj-39 42 6 et et PROPN anesthj-39 42 7 al4 al4 PROPN anesthj-39 42 8 as as ADP anesthj-39 42 9 an an DET anesthj-39 42 10 artifact artifact NOUN anesthj-39 42 11 occurring occur VERB anesthj-39 42 12 at at ADP anesthj-39 42 13 increasing increase VERB anesthj-39 42 14 depths depth NOUN anesthj-39 42 15 until until SCONJ anesthj-39 42 16 the the DET anesthj-39 42 17 needle needle NOUN anesthj-39 42 18 angle angle NOUN anesthj-39 42 19 changes change NOUN anesthj-39 42 20 or or CCONJ anesthj-39 42 21 the the DET anesthj-39 42 22 wave wave NOUN anesthj-39 42 23 strength strength NOUN anesthj-39 42 24 is be AUX anesthj-39 42 25 decreased decrease VERB anesthj-39 42 26 . . PUNCT anesthj-39 43 1 this this PRON anesthj-39 43 2 is be AUX anesthj-39 43 3 known know VERB anesthj-39 43 4 as as ADP anesthj-39 43 5 reverberation reverberation NOUN anesthj-39 43 6 artifact.5 artifact.5 NOUN anesthj-39 43 7 as as ADV anesthj-39 43 8 early early ADV anesthj-39 43 9 as as ADP anesthj-39 43 10 2004 2004 NUM anesthj-39 43 11 , , PUNCT anesthj-39 43 12 needle needle NOUN anesthj-39 43 13 visualization visualization NOUN anesthj-39 43 14 loss loss NOUN anesthj-39 43 15 was be AUX anesthj-39 43 16 reported report VERB anesthj-39 43 17 . . PUNCT anesthj-39 44 1 schafhalter schafhalter PROPN anesthj-39 44 2 - - PUNCT anesthj-39 44 3 zoppoth zoppoth PROPN anesthj-39 44 4 and and CCONJ anesthj-39 44 5 colleagues5 colleagues5 NOUN anesthj-39 44 6 noted note VERB anesthj-39 44 7 that that SCONJ anesthj-39 44 8 , , PUNCT anesthj-39 44 9 as as SCONJ anesthj-39 44 10 the the DET anesthj-39 44 11 needle needle NOUN anesthj-39 44 12 angle angle NOUN anesthj-39 44 13 increased increase VERB anesthj-39 44 14 ( ( PUNCT anesthj-39 44 15 or or CCONJ anesthj-39 44 16 became become VERB anesthj-39 44 17 steeper steep ADJ anesthj-39 44 18 ) ) PUNCT anesthj-39 44 19 , , PUNCT anesthj-39 44 20 needle needle NOUN anesthj-39 44 21 visibility visibility NOUN anesthj-39 44 22 decreased decrease VERB anesthj-39 44 23 . . PUNCT anesthj-39 45 1 this this PRON anesthj-39 45 2 was be AUX anesthj-39 45 3 a a DET anesthj-39 45 4 reproducible reproducible ADJ anesthj-39 45 5 finding finding NOUN anesthj-39 45 6 in in ADP anesthj-39 45 7 human human ADJ anesthj-39 45 8 tissue tissue NOUN anesthj-39 45 9 , , PUNCT anesthj-39 45 10 but but CCONJ anesthj-39 45 11 those those DET anesthj-39 45 12 authors author NOUN anesthj-39 45 13 did do AUX anesthj-39 45 14 not not PART anesthj-39 45 15 use use VERB anesthj-39 45 16 a a DET anesthj-39 45 17 variety variety NOUN anesthj-39 45 18 of of ADP anesthj-39 45 19 ultrasound ultrasound NOUN anesthj-39 45 20 equipment equipment NOUN anesthj-39 45 21 . . PUNCT anesthj-39 46 1 miura miura PROPN anesthj-39 46 2 et et PROPN anesthj-39 46 3 al6 al6 PROPN anesthj-39 46 4 also also ADV anesthj-39 46 5 described describe VERB anesthj-39 46 6 needle needle NOUN anesthj-39 46 7 visualization visualization NOUN anesthj-39 46 8 loss loss NOUN anesthj-39 46 9 at at ADP anesthj-39 46 10 particular particular ADJ anesthj-39 46 11 angles angle NOUN anesthj-39 46 12 . . PUNCT anesthj-39 47 1 an an DET anesthj-39 47 2 important important ADJ anesthj-39 47 3 element element NOUN anesthj-39 47 4 from from ADP anesthj-39 47 5 this this DET anesthj-39 47 6 article article NOUN anesthj-39 47 7 was be AUX anesthj-39 47 8 the the DET anesthj-39 47 9 clear clear ADJ anesthj-39 47 10 loss loss NOUN anesthj-39 47 11 of of ADP anesthj-39 47 12 visualization visualization NOUN anesthj-39 47 13 with with ADP anesthj-39 47 14 a a DET anesthj-39 47 15 linear linear ADJ anesthj-39 47 16 probe probe NOUN anesthj-39 47 17 at at ADP anesthj-39 47 18 between between ADP anesthj-39 47 19 30 30 NUM anesthj-39 47 20 and and CCONJ anesthj-39 47 21 45 45 NUM anesthj-39 47 22 degrees.6 degrees.6 NOUN anesthj-39 47 23 this this DET anesthj-39 47 24 article article NOUN anesthj-39 47 25 was be AUX anesthj-39 47 26 probably probably ADV anesthj-39 47 27 the the DET anesthj-39 47 28 first first ADJ anesthj-39 47 29 report report NOUN anesthj-39 47 30 making make VERB anesthj-39 47 31 the the DET anesthj-39 47 32 link link NOUN anesthj-39 47 33 between between ADP anesthj-39 47 34 linear linear PROPN anesthj-39 47 35 probe probe NOUN anesthj-39 47 36 use use NOUN anesthj-39 47 37 and and CCONJ anesthj-39 47 38 steep steep ADJ anesthj-39 47 39 needle needle NOUN anesthj-39 47 40 angle angle NOUN anesthj-39 47 41 visualization visualization NOUN anesthj-39 47 42 loss loss NOUN anesthj-39 47 43 . . PUNCT anesthj-39 48 1 this this PRON anesthj-39 48 2 is be AUX anesthj-39 48 3 important important ADJ anesthj-39 48 4 to to ADP anesthj-39 48 5 clinical clinical ADJ anesthj-39 48 6 practice practice NOUN anesthj-39 48 7 because because SCONJ anesthj-39 48 8 most most ADJ anesthj-39 48 9 scans scan NOUN anesthj-39 48 10 and and CCONJ anesthj-39 48 11 needle needle NOUN anesthj-39 48 12 techniques technique NOUN anesthj-39 48 13 commonly commonly ADV anesthj-39 48 14 used use VERB anesthj-39 48 15 in in ADP anesthj-39 48 16 anesthesia anesthesia PROPN anesthj-39 48 17 care care NOUN anesthj-39 48 18 are be AUX anesthj-39 48 19 performed perform VERB anesthj-39 48 20 with with ADP anesthj-39 48 21 a a DET anesthj-39 48 22 linear linear ADJ anesthj-39 48 23 probe probe NOUN anesthj-39 48 24 . . PUNCT anesthj-39 49 1 the the DET anesthj-39 49 2 characteristic characteristic NOUN anesthj-39 49 3 of of ADP anesthj-39 49 4 increased increase VERB anesthj-39 49 5 insertion insertion NOUN anesthj-39 49 6 and and CCONJ anesthj-39 49 7 visualization visualization NOUN anesthj-39 49 8 loss loss NOUN anesthj-39 49 9 is be AUX anesthj-39 49 10 not not PART anesthj-39 49 11 unique unique ADJ anesthj-39 49 12 to to ADP anesthj-39 49 13 needle needle NOUN anesthj-39 49 14 insertion insertion NOUN anesthj-39 49 15 . . PUNCT anesthj-39 50 1 junji junji PROPN anesthj-39 50 2 et et PROPN anesthj-39 50 3 al7 al7 PROPN anesthj-39 50 4 observed observe VERB anesthj-39 50 5 that that SCONJ anesthj-39 50 6 peri peri NOUN anesthj-39 50 7 - - PUNCT anesthj-39 50 8 neural neural ADJ anesthj-39 50 9 catheters catheter NOUN anesthj-39 50 10 also also ADV anesthj-39 50 11 exhibit exhibit VERB anesthj-39 50 12 similar similar ADJ anesthj-39 50 13 visual visual ADJ anesthj-39 50 14 loss loss NOUN anesthj-39 50 15 during during ADP anesthj-39 50 16 ultrasound ultrasound NOUN anesthj-39 50 17 techniques technique NOUN anesthj-39 50 18 when when SCONJ anesthj-39 50 19 placed place VERB anesthj-39 50 20 at at ADP anesthj-39 50 21 steeper steep ADJ anesthj-39 50 22 angles angle NOUN anesthj-39 50 23 . . PUNCT anesthj-39 51 1 interestingly interestingly ADV anesthj-39 51 2 , , PUNCT anesthj-39 51 3 the the DET anesthj-39 51 4 visual visual ADJ anesthj-39 51 5 loss loss NOUN anesthj-39 51 6 is be AUX anesthj-39 51 7 less less ADV anesthj-39 51 8 pronounced pronounce VERB anesthj-39 51 9 with with ADP anesthj-39 51 10 a a DET anesthj-39 51 11 curvilinear curvilinear ADJ anesthj-39 51 12 probe probe NOUN anesthj-39 51 13 at at ADP anesthj-39 51 14 steeper steep ADJ anesthj-39 51 15 angles angle NOUN anesthj-39 51 16 . . PUNCT anesthj-39 52 1 similar similar ADJ anesthj-39 52 2 results result NOUN anesthj-39 52 3 were be AUX anesthj-39 52 4 reported report VERB anesthj-39 52 5 by by ADP anesthj-39 52 6 abbal abbal ADJ anesthj-39 52 7 and and CCONJ anesthj-39 52 8 colleagues.8 colleagues.8 PROPN anesthj-39 52 9 hocking hocking PROPN anesthj-39 52 10 et et PROPN anesthj-39 52 11 al9 al9 PROPN anesthj-39 52 12 observed observe VERB anesthj-39 52 13 that that SCONJ anesthj-39 52 14 the the DET anesthj-39 52 15 use use NOUN anesthj-39 52 16 of of ADP anesthj-39 52 17 cadaveric cadaveric ADJ anesthj-39 52 18 tissue tissue NOUN anesthj-39 52 19 versus versus ADP anesthj-39 52 20 commercially commercially ADV anesthj-39 52 21 available available ADJ anesthj-39 52 22 alternatives alternative NOUN anesthj-39 52 23 to to PART anesthj-39 52 24 assess assess VERB anesthj-39 52 25 needle needle NOUN anesthj-39 52 26 visibility visibility NOUN anesthj-39 52 27 differed differ VERB anesthj-39 52 28 in in ADP anesthj-39 52 29 echogenicity echogenicity NOUN anesthj-39 52 30 . . PUNCT anesthj-39 53 1 he he PRON anesthj-39 53 2 noted note VERB anesthj-39 53 3 that that SCONJ anesthj-39 53 4 phantoms phantom NOUN anesthj-39 53 5 and and CCONJ anesthj-39 53 6 gel gel NOUN anesthj-39 53 7 mediums medium NOUN anesthj-39 53 8 had have VERB anesthj-39 53 9 a a DET anesthj-39 53 10 low low ADJ anesthj-39 53 11 background background NOUN anesthj-39 53 12 echogenicity echogenicity NOUN anesthj-39 53 13 and and CCONJ anesthj-39 53 14 would would AUX anesthj-39 53 15 therefore therefore ADV anesthj-39 53 16 exaggerate exaggerate VERB anesthj-39 53 17 needle needle NOUN anesthj-39 53 18 visibility visibility NOUN anesthj-39 53 19 during during ADP anesthj-39 53 20 skills skill NOUN anesthj-39 53 21 acquisition acquisition NOUN anesthj-39 53 22 . . PUNCT anesthj-39 54 1 this this PRON anesthj-39 54 2 differed differ VERB anesthj-39 54 3 from from ADP anesthj-39 54 4 fresh fresh ADJ anesthj-39 54 5 - - PUNCT anesthj-39 54 6 frozen frozen ADJ anesthj-39 54 7 cadavers cadaver NOUN anesthj-39 54 8 in in ADP anesthj-39 54 9 that that SCONJ anesthj-39 54 10 they they PRON anesthj-39 54 11 retained retain VERB anesthj-39 54 12 greater great ADJ anesthj-39 54 13 lifelike lifelike ADJ anesthj-39 54 14 clinical clinical ADJ anesthj-39 54 15 echogenicity echogenicity NOUN anesthj-39 54 16 . . PUNCT anesthj-39 55 1 this this PRON anesthj-39 55 2 is be AUX anesthj-39 55 3 important important ADJ anesthj-39 55 4 when when SCONJ anesthj-39 55 5 evaluating evaluate VERB anesthj-39 55 6 needle needle NOUN anesthj-39 55 7 angle angle NOUN anesthj-39 55 8 visual visual ADJ anesthj-39 55 9 loss loss NOUN anesthj-39 55 10 , , PUNCT anesthj-39 55 11 because because SCONJ anesthj-39 55 12 the the DET anesthj-39 55 13 medium medium NOUN anesthj-39 55 14 in in ADP anesthj-39 55 15 which which PRON anesthj-39 55 16 the the DET anesthj-39 55 17 evaluation evaluation NOUN anesthj-39 55 18 occurs occur VERB anesthj-39 55 19 influences influence NOUN anesthj-39 55 20 needle needle NOUN anesthj-39 55 21 visibility.9 visibility.9 PROPN anesthj-39 55 22 in in ADP anesthj-39 55 23 essence essence NOUN anesthj-39 55 24 , , PUNCT anesthj-39 55 25 this this PRON anesthj-39 55 26 means mean VERB anesthj-39 55 27 that that SCONJ anesthj-39 55 28 techniques technique NOUN anesthj-39 55 29 are be AUX anesthj-39 55 30 easier easy ADJ anesthj-39 55 31 to to PART anesthj-39 55 32 perform perform VERB anesthj-39 55 33 on on ADP anesthj-39 55 34 simulators simulator NOUN anesthj-39 55 35 and and CCONJ anesthj-39 55 36 gel gel NOUN anesthj-39 55 37 mediums medium NOUN anesthj-39 55 38 than than ADP anesthj-39 55 39 on on ADP anesthj-39 55 40 actual actual ADJ anesthj-39 55 41 human human ADJ anesthj-39 55 42 tissue tissue NOUN anesthj-39 55 43 . . PUNCT anesthj-39 56 1 it it PRON anesthj-39 56 2 has have VERB anesthj-39 56 3 yet yet ADV anesthj-39 56 4 to to PART anesthj-39 56 5 be be AUX anesthj-39 56 6 evaluated evaluate VERB anesthj-39 56 7 whether whether SCONJ anesthj-39 56 8 ultrasound ultrasound NOUN anesthj-39 56 9 - - PUNCT anesthj-39 56 10 guided guide VERB anesthj-39 56 11 skills skill NOUN anesthj-39 56 12 acquisition acquisition NOUN anesthj-39 56 13 is be AUX anesthj-39 56 14 made make VERB anesthj-39 56 15 more more ADV anesthj-39 56 16 efficient efficient ADJ anesthj-39 56 17 by by ADP anesthj-39 56 18 the the DET anesthj-39 56 19 addition addition NOUN anesthj-39 56 20 of of ADP anesthj-39 56 21 formal formal ADJ anesthj-39 56 22 training training NOUN anesthj-39 56 23 on on ADP anesthj-39 56 24 simulators simulator NOUN anesthj-39 56 25 prior prior ADV anesthj-39 56 26 to to ADP anesthj-39 56 27 actual actual ADJ anesthj-39 56 28 patient patient NOUN anesthj-39 56 29 care care NOUN anesthj-39 56 30 , , PUNCT anesthj-39 56 31 although although SCONJ anesthj-39 56 32 this this PRON anesthj-39 56 33 seems seem VERB anesthj-39 56 34 to to PART anesthj-39 56 35 make make VERB anesthj-39 56 36 sense sense NOUN anesthj-39 56 37 . . PUNCT anesthj-39 57 1 hebard hebard NOUN anesthj-39 57 2 and and CCONJ anesthj-39 57 3 colleagues10 colleagues10 PROPN anesthj-39 57 4 quantifiably quantifiably ADV anesthj-39 57 5 linked link VERB anesthj-39 57 6 steep steep ADJ anesthj-39 57 7 needle needle NOUN anesthj-39 57 8 angles angle NOUN anesthj-39 57 9 to to ADP anesthj-39 57 10 visual visual ADJ anesthj-39 57 11 loss loss NOUN anesthj-39 57 12 . . PUNCT anesthj-39 58 1 in in ADP anesthj-39 58 2 this this DET anesthj-39 58 3 important important ADJ anesthj-39 58 4 article article NOUN anesthj-39 58 5 , , PUNCT anesthj-39 58 6 they they PRON anesthj-39 58 7 also also ADV anesthj-39 58 8 concluded conclude VERB anesthj-39 58 9 that that SCONJ anesthj-39 58 10 every every DET anesthj-39 58 11 10 10 NUM anesthj-39 58 12 - - PUNCT anesthj-39 58 13 degree degree NOUN anesthj-39 58 14 increase increase NOUN anesthj-39 58 15 in in ADP anesthj-39 58 16 needle needle NOUN anesthj-39 58 17 angle angle NOUN anesthj-39 58 18 steepness steepness NOUN anesthj-39 58 19 resulted result VERB anesthj-39 58 20 in in ADP anesthj-39 58 21 a a DET anesthj-39 58 22 12 12 NUM anesthj-39 58 23 % % NOUN anesthj-39 58 24 visual visual ADJ anesthj-39 58 25 loss loss NOUN anesthj-39 58 26 . . PUNCT anesthj-39 59 1 stated state VERB anesthj-39 59 2 another another DET anesthj-39 59 3 way way NOUN anesthj-39 59 4 , , PUNCT anesthj-39 59 5 if if SCONJ anesthj-39 59 6 the the DET anesthj-39 59 7 needle needle NOUN anesthj-39 59 8 angle angle NOUN anesthj-39 59 9 exceeds exceed VERB anesthj-39 59 10 about about ADV anesthj-39 59 11 40 40 NUM anesthj-39 59 12 degrees degree NOUN anesthj-39 59 13 , , PUNCT anesthj-39 59 14 visualization visualization NOUN anesthj-39 59 15 of of ADP anesthj-39 59 16 that that DET anesthj-39 59 17 needle needle NOUN anesthj-39 59 18 decreases decrease VERB anesthj-39 59 19 by by ADP anesthj-39 59 20 about about ADV anesthj-39 59 21 half half NOUN anesthj-39 59 22 . . PUNCT anesthj-39 60 1 weismann weismann PROPN anesthj-39 60 2 et et PROPN anesthj-39 60 3 al11 al11 PROPN anesthj-39 60 4 confirmed confirm VERB anesthj-39 60 5 earlier early ADJ anesthj-39 60 6 findings finding NOUN anesthj-39 60 7 that that PRON anesthj-39 60 8 correlated correlate VERB anesthj-39 60 9 visual visual ADJ anesthj-39 60 10 loss loss NOUN anesthj-39 60 11 with with ADP anesthj-39 60 12 steep steep ADJ anesthj-39 60 13 angle angle NOUN anesthj-39 60 14 insertion insertion NOUN anesthj-39 60 15 . . PUNCT anesthj-39 61 1 those those DET anesthj-39 61 2 authors author NOUN anesthj-39 61 3 also also ADV anesthj-39 61 4 observed observe VERB anesthj-39 61 5 that that SCONJ anesthj-39 61 6 this this DET anesthj-39 61 7 visual visual ADJ anesthj-39 61 8 loss loss NOUN anesthj-39 61 9 was be AUX anesthj-39 61 10 less less ADV anesthj-39 61 11 severe severe ADJ anesthj-39 61 12 if if SCONJ anesthj-39 61 13 the the DET anesthj-39 61 14 needle needle NOUN anesthj-39 61 15 was be AUX anesthj-39 61 16 visualized visualize VERB anesthj-39 61 17 by by ADP anesthj-39 61 18 use use NOUN anesthj-39 61 19 of of ADP anesthj-39 61 20 ultrasound ultrasound ADJ anesthj-39 61 21 beam beam NOUN anesthj-39 61 22 compound compound NOUN anesthj-39 61 23 imaging.11 imaging.11 VERB anesthj-39 61 24 this this DET anesthj-39 61 25 literature literature NOUN anesthj-39 61 26 review review NOUN anesthj-39 61 27 points point VERB anesthj-39 61 28 to to ADP anesthj-39 61 29 a a DET anesthj-39 61 30 few few ADJ anesthj-39 61 31 interesting interesting ADJ anesthj-39 61 32 correlations correlation NOUN anesthj-39 61 33 . . PUNCT anesthj-39 62 1 if if SCONJ anesthj-39 62 2 needle needle NOUN anesthj-39 62 3 angles angle NOUN anesthj-39 62 4 exceed exceed VERB anesthj-39 62 5 about about ADV anesthj-39 62 6 30 30 NUM anesthj-39 62 7 to to PART anesthj-39 62 8 40 40 NUM anesthj-39 62 9 degrees degree NOUN anesthj-39 62 10 , , PUNCT anesthj-39 62 11 visualization visualization NOUN anesthj-39 62 12 ultimately ultimately ADV anesthj-39 62 13 decreases decrease VERB anesthj-39 62 14 . . PUNCT anesthj-39 63 1 the the DET anesthj-39 63 2 only only ADJ anesthj-39 63 3 way way NOUN anesthj-39 63 4 described describe VERB anesthj-39 63 5 in in ADP anesthj-39 63 6 the the DET anesthj-39 63 7 current current ADJ anesthj-39 63 8 literature literature NOUN anesthj-39 63 9 to to PART anesthj-39 63 10 alleviate alleviate VERB anesthj-39 63 11 this this DET anesthj-39 63 12 problem problem NOUN anesthj-39 63 13 is be AUX anesthj-39 63 14 to to PART anesthj-39 63 15 use use VERB anesthj-39 63 16 some some DET anesthj-39 63 17 sort sort NOUN anesthj-39 63 18 of of ADP anesthj-39 63 19 ultrasound ultrasound NOUN anesthj-39 63 20 beam beam NOUN anesthj-39 63 21 alteration alteration NOUN anesthj-39 63 22 or or CCONJ anesthj-39 63 23 enhancement enhancement NOUN anesthj-39 63 24 , , PUNCT anesthj-39 63 25 or or CCONJ anesthj-39 63 26 to to PART anesthj-39 63 27 change change VERB anesthj-39 63 28 to to ADP anesthj-39 63 29 a a DET anesthj-39 63 30 curved curved ADJ anesthj-39 63 31 probe probe NOUN anesthj-39 63 32 ( ( PUNCT anesthj-39 63 33 which which PRON anesthj-39 63 34 is be AUX anesthj-39 63 35 usually usually ADV anesthj-39 63 36 unsuitable unsuitable ADJ anesthj-39 63 37 for for ADP anesthj-39 63 38 most most ADV anesthj-39 63 39 anesthesiarelated anesthesiarelate VERB anesthj-39 63 40 procedures procedure NOUN anesthj-39 63 41 ) ) PUNCT anesthj-39 63 42 . . PUNCT anesthj-39 64 1 description description NOUN anesthj-39 64 2 of of ADP anesthj-39 64 3 technique technique NOUN anesthj-39 64 4 for for ADP anesthj-39 64 5 improved improved ADJ anesthj-39 64 6 needle needle NOUN anesthj-39 64 7 visibility visibility NOUN anesthj-39 64 8 we we PRON anesthj-39 64 9 developed develop VERB anesthj-39 64 10 a a DET anesthj-39 64 11 method method NOUN anesthj-39 64 12 whereby whereby SCONJ anesthj-39 64 13 a a DET anesthj-39 64 14 clinician clinician NOUN anesthj-39 64 15 can can AUX anesthj-39 64 16 place place VERB anesthj-39 64 17 an an DET anesthj-39 64 18 inplane inplane NOUN anesthj-39 64 19 needle needle NOUN anesthj-39 64 20 under under ADP anesthj-39 64 21 any any DET anesthj-39 64 22 ultrasound ultrasound NOUN anesthj-39 64 23 beam beam NOUN anesthj-39 64 24 and and CCONJ anesthj-39 64 25 be be AUX anesthj-39 64 26 able able ADJ anesthj-39 64 27 to to PART anesthj-39 64 28 visualize visualize VERB anesthj-39 64 29 it it PRON anesthj-39 64 30 , , PUNCT anesthj-39 64 31 regardless regardless ADV anesthj-39 64 32 of of ADP anesthj-39 64 33 depth depth NOUN anesthj-39 64 34 of of ADP anesthj-39 64 35 the the DET anesthj-39 64 36 target target NOUN anesthj-39 64 37 , , PUNCT anesthj-39 64 38 age age NOUN anesthj-39 64 39 , , PUNCT anesthj-39 64 40 or or CCONJ anesthj-39 64 41 complexity complexity NOUN anesthj-39 64 42 of of ADP anesthj-39 64 43 the the DET anesthj-39 64 44 machine machine NOUN anesthj-39 64 45 . . PUNCT anesthj-39 65 1 this this DET anesthj-39 65 2 method method NOUN anesthj-39 65 3 can can AUX anesthj-39 65 4 allow allow VERB anesthj-39 65 5 even even ADV anesthj-39 65 6 the the DET anesthj-39 65 7 most most ADV anesthj-39 65 8 inexperienced inexperienced ADJ anesthj-39 65 9 providers provider NOUN anesthj-39 65 10 access access NOUN anesthj-39 65 11 to to ADP anesthj-39 65 12 readily readily ADV anesthj-39 65 13 viewable viewable ADJ anesthj-39 65 14 needles needle NOUN anesthj-39 65 15 on on ADP anesthj-39 65 16 the the DET anesthj-39 65 17 monitor monitor NOUN anesthj-39 65 18 during during ADP anesthj-39 65 19 regional regional ADJ anesthj-39 65 20 and and CCONJ anesthj-39 65 21 vascular vascular ADJ anesthj-39 65 22 procedures procedure NOUN anesthj-39 65 23 . . PUNCT anesthj-39 66 1 the the DET anesthj-39 66 2 criteria criterion NOUN anesthj-39 66 3 for for ADP anesthj-39 66 4 this this DET anesthj-39 66 5 new new ADJ anesthj-39 66 6 method method NOUN anesthj-39 66 7 are be AUX anesthj-39 66 8 as as SCONJ anesthj-39 66 9 follows follow VERB anesthj-39 66 10 : : PUNCT anesthj-39 66 11 1 1 X anesthj-39 66 12 ) ) PUNCT anesthj-39 66 13 the the DET anesthj-39 66 14 needle needle NOUN anesthj-39 66 15 angle angle NOUN anesthj-39 66 16 can can AUX anesthj-39 66 17 not not PART anesthj-39 66 18 exceed exceed VERB anesthj-39 66 19 30 30 NUM anesthj-39 66 20 degrees degree NOUN anesthj-39 66 21 . . PUNCT anesthj-39 67 1 2 2 X anesthj-39 67 2 ) ) PUNCT anesthj-39 67 3 the the DET anesthj-39 67 4 needle needle NOUN anesthj-39 67 5 guidance guidance NOUN anesthj-39 67 6 software software NOUN anesthj-39 67 7 and and CCONJ anesthj-39 67 8 enhancement enhancement NOUN anesthj-39 67 9 can can AUX anesthj-39 67 10 not not PART anesthj-39 67 11 be be AUX anesthj-39 67 12 engaged engage VERB anesthj-39 67 13 , , PUNCT anesthj-39 67 14 as as SCONJ anesthj-39 67 15 there there PRON anesthj-39 67 16 are be VERB anesthj-39 67 17 too too ADV anesthj-39 67 18 many many ADJ anesthj-39 67 19 variables variable NOUN anesthj-39 67 20 to to PART anesthj-39 67 21 consider consider VERB anesthj-39 67 22 regarding regard VERB anesthj-39 67 23 current current ADJ anesthj-39 67 24 and and CCONJ anesthj-39 67 25 older old ADJ anesthj-39 67 26 systems system NOUN anesthj-39 67 27 . . PUNCT anesthj-39 68 1 3 3 X anesthj-39 68 2 ) ) PUNCT anesthj-39 68 3 only only ADV anesthj-39 68 4 standard standard ADJ anesthj-39 68 5 block block NOUN anesthj-39 68 6 needles needle NOUN anesthj-39 68 7 , , PUNCT anesthj-39 68 8 which which PRON anesthj-39 68 9 are be AUX anesthj-39 68 10 easy easy ADJ anesthj-39 68 11 to to PART anesthj-39 68 12 obtain obtain VERB anesthj-39 68 13 and and CCONJ anesthj-39 68 14 cost cost NOUN anesthj-39 68 15 - - PUNCT anesthj-39 68 16 effective effective ADJ anesthj-39 68 17 , , PUNCT anesthj-39 68 18 should should AUX anesthj-39 68 19 be be AUX anesthj-39 68 20 used use VERB anesthj-39 68 21 . . PUNCT anesthj-39 68 22     SPACE anesthj-39 69 1 we we PRON anesthj-39 69 2 first first ADV anesthj-39 69 3 determined determine VERB anesthj-39 69 4 the the DET anesthj-39 69 5 pieces piece NOUN anesthj-39 69 6 of of ADP anesthj-39 69 7 information information NOUN anesthj-39 69 8 easily easily ADV anesthj-39 69 9 accessible accessible ADJ anesthj-39 69 10 by by ADP anesthj-39 69 11 virtually virtually ADV anesthj-39 69 12 all all PRON anesthj-39 69 13 ultrasound ultrasound PROPN anesthj-39 69 14 machines machine NOUN anesthj-39 69 15 . . PUNCT anesthj-39 70 1 the the DET anesthj-39 70 2 commonality commonality NOUN anesthj-39 70 3 was be AUX anesthj-39 70 4 depth depth NOUN anesthj-39 70 5 . . PUNCT anesthj-39 71 1 reading read VERB anesthj-39 71 2 the the DET anesthj-39 71 3 depth depth NOUN anesthj-39 71 4 on on ADP anesthj-39 71 5 the the DET anesthj-39 71 6 screen screen NOUN anesthj-39 71 7 was be AUX anesthj-39 71 8 nearly nearly ADV anesthj-39 71 9 universal universal ADJ anesthj-39 71 10 among among ADP anesthj-39 71 11 the the DET anesthj-39 71 12 surveyed survey VERB anesthj-39 71 13 machines machine NOUN anesthj-39 71 14 in in ADP anesthj-39 71 15 current current ADJ anesthj-39 71 16 practice practice NOUN anesthj-39 71 17 . . PUNCT anesthj-39 72 1 the the DET anesthj-39 72 2 second second ADJ anesthj-39 72 3 piece piece NOUN anesthj-39 72 4 of of ADP anesthj-39 72 5 information information NOUN anesthj-39 72 6 known know VERB anesthj-39 72 7 from from ADP anesthj-39 72 8 the the DET anesthj-39 72 9 literature literature NOUN anesthj-39 72 10 review review NOUN anesthj-39 72 11 was be AUX anesthj-39 72 12 that that SCONJ anesthj-39 72 13 30 30 NUM anesthj-39 72 14 degrees degree NOUN anesthj-39 72 15 seemed seem VERB anesthj-39 72 16 to to PART anesthj-39 72 17 be be AUX anesthj-39 72 18 the the DET anesthj-39 72 19 maximum maximum ADJ anesthj-39 72 20 allowable allowable ADJ anesthj-39 72 21 angle angle NOUN anesthj-39 72 22 to to PART anesthj-39 72 23 produce produce VERB anesthj-39 72 24 perfectly perfectly ADV anesthj-39 72 25 readable readable ADJ anesthj-39 72 26 needle needle NOUN anesthj-39 72 27 echogenicity echogenicity NOUN anesthj-39 72 28 . . PUNCT anesthj-39 73 1 this this DET anesthj-39 73 2 cutoff cutoff NOUN anesthj-39 73 3 applies apply VERB anesthj-39 73 4 to to ADP anesthj-39 73 5 needles needle NOUN anesthj-39 73 6 placed place VERB anesthj-39 73 7 in in ADP anesthj-39 73 8 - - PUNCT anesthj-39 73 9 plane plane NOUN anesthj-39 73 10 . . PUNCT anesthj-39 74 1 although although SCONJ anesthj-39 74 2 a a DET anesthj-39 74 3 great great ADJ anesthj-39 74 4 many many ADJ anesthj-39 74 5 other other ADJ anesthj-39 74 6 pieces piece NOUN anesthj-39 74 7 of of ADP anesthj-39 74 8 information information NOUN anesthj-39 74 9 were be AUX anesthj-39 74 10 available available ADJ anesthj-39 74 11 , , PUNCT anesthj-39 74 12 they they PRON anesthj-39 74 13 were be AUX anesthj-39 74 14 not not PART anesthj-39 74 15 common common ADJ anesthj-39 74 16 to to ADP anesthj-39 74 17 virtually virtually ADV anesthj-39 74 18 all all DET anesthj-39 74 19 machines machine NOUN anesthj-39 74 20 . . PUNCT anesthj-39 75 1 thus thus ADV anesthj-39 75 2 , , PUNCT anesthj-39 75 3 on on ADP anesthj-39 75 4 the the DET anesthj-39 75 5 basis basis NOUN anesthj-39 75 6 of of ADP anesthj-39 75 7 these these DET anesthj-39 75 8 pieces piece NOUN anesthj-39 75 9 of of ADP anesthj-39 75 10 information information NOUN anesthj-39 75 11 , , PUNCT anesthj-39 75 12 we we PRON anesthj-39 75 13 sought seek VERB anesthj-39 75 14 to to PART anesthj-39 75 15 complete complete VERB anesthj-39 75 16 anesthesia anesthesia PROPN anesthj-39 75 17 ejournal ejournal PROPN anesthj-39 75 18 www.anesthesiaejournal.com www.anesthesiaejournal.com PROPN anesthj-39 75 19 volume volume NOUN anesthj-39 75 20 3 3 NUM anesthj-39 75 21 issue issue NOUN anesthj-39 75 22 2 2 NUM anesthj-39 75 23 2015 2015 NUM anesthj-39 75 24 a a DET anesthj-39 75 25 simple simple ADJ anesthj-39 75 26 method method NOUN anesthj-39 75 27 to to PART anesthj-39 75 28 allow allow VERB anesthj-39 75 29 anyone anyone PRON anesthj-39 75 30 to to PART anesthj-39 75 31 produce produce VERB anesthj-39 75 32 readable readable ADJ anesthj-39 75 33 needles needle NOUN anesthj-39 75 34 at at ADP anesthj-39 75 35 any any DET anesthj-39 75 36 depth depth NOUN anesthj-39 75 37 . . PUNCT anesthj-39 75 38     SPACE anesthj-39 76 1 the the DET anesthj-39 76 2 solution solution NOUN anesthj-39 76 3 was be AUX anesthj-39 76 4 described describe VERB anesthj-39 76 5 as as ADP anesthj-39 76 6 a a DET anesthj-39 76 7 simple simple ADJ anesthj-39 76 8 inverted inverted ADJ anesthj-39 76 9 triangle triangle NOUN anesthj-39 76 10 ( ( PUNCT anesthj-39 76 11 figure figure NOUN anesthj-39 76 12 1 1 NUM anesthj-39 76 13 ) ) PUNCT anesthj-39 76 14 . . PUNCT anesthj-39 77 1 the the DET anesthj-39 77 2 base base NOUN anesthj-39 77 3 of of ADP anesthj-39 77 4 the the DET anesthj-39 77 5 triangle triangle NOUN anesthj-39 77 6 became become VERB anesthj-39 77 7 the the DET anesthj-39 77 8 probe probe NOUN anesthj-39 77 9 interface interface NOUN anesthj-39 77 10 with with ADP anesthj-39 77 11 the the DET anesthj-39 77 12 skin skin NOUN anesthj-39 77 13 . . PUNCT anesthj-39 78 1 the the DET anesthj-39 78 2 height height NOUN anesthj-39 78 3 of of ADP anesthj-39 78 4 the the DET anesthj-39 78 5 triangle triangle NOUN anesthj-39 78 6 became become VERB anesthj-39 78 7 the the DET anesthj-39 78 8 depth depth NOUN anesthj-39 78 9 to to ADP anesthj-39 78 10 the the DET anesthj-39 78 11 target target NOUN anesthj-39 78 12 of of ADP anesthj-39 78 13 interest interest NOUN anesthj-39 78 14 . . PUNCT anesthj-39 79 1 this this PRON anesthj-39 79 2 left leave VERB anesthj-39 79 3 only only ADV anesthj-39 79 4 the the DET anesthj-39 79 5 distance distance NOUN anesthj-39 79 6 from from ADP anesthj-39 79 7 the the DET anesthj-39 79 8 probe probe NOUN anesthj-39 79 9 to to PART anesthj-39 79 10 begin begin VERB anesthj-39 79 11 needle needle NOUN anesthj-39 79 12 entry entry NOUN anesthj-39 79 13 , , PUNCT anesthj-39 79 14 keeping keep VERB anesthj-39 79 15 in in ADP anesthj-39 79 16 mind mind NOUN anesthj-39 79 17 that that SCONJ anesthj-39 79 18 the the DET anesthj-39 79 19 needle needle NOUN anesthj-39 79 20 could could AUX anesthj-39 79 21 not not PART anesthj-39 79 22 exceed exceed VERB anesthj-39 79 23 30 30 NUM anesthj-39 79 24 degrees degree NOUN anesthj-39 79 25 of of ADP anesthj-39 79 26 approach approach NOUN anesthj-39 79 27 to to ADP anesthj-39 79 28 the the DET anesthj-39 79 29 target target NOUN anesthj-39 79 30 . . PUNCT anesthj-39 79 31     SPACE anesthj-39 79 32 figure figure NOUN anesthj-39 79 33 1 1 NUM anesthj-39 79 34 . . PUNCT anesthj-39 79 35 triangulation triangulation NOUN anesthj-39 79 36 of of ADP anesthj-39 79 37 3 3 NUM anesthj-39 79 38 points point NOUN anesthj-39 79 39 using use VERB anesthj-39 79 40 the the DET anesthj-39 79 41 law law NOUN anesthj-39 79 42 of of ADP anesthj-39 79 43 sines sine NOUN anesthj-39 79 44 : : PUNCT anesthj-39 79 45 ( ( PUNCT anesthj-39 79 46 1 1 X anesthj-39 79 47 ) ) PUNCT anesthj-39 79 48 the the DET anesthj-39 79 49 location location NOUN anesthj-39 79 50 of of ADP anesthj-39 79 51 the the DET anesthj-39 79 52 ultrasound ultrasound NOUN anesthj-39 79 53 probe probe NOUN anesthj-39 79 54 , , PUNCT anesthj-39 79 55 ( ( PUNCT anesthj-39 79 56 2 2 X anesthj-39 79 57 ) ) PUNCT anesthj-39 79 58 the the DET anesthj-39 79 59 nerve nerve NOUN anesthj-39 79 60 target target NOUN anesthj-39 79 61 , , PUNCT anesthj-39 79 62 and and CCONJ anesthj-39 79 63 ( ( PUNCT anesthj-39 79 64 3 3 X anesthj-39 79 65 ) ) PUNCT anesthj-39 79 66 the the DET anesthj-39 79 67 site site NOUN anesthj-39 79 68 of of ADP anesthj-39 79 69 needle needle NOUN anesthj-39 79 70 entry entry NOUN anesthj-39 79 71 . . PUNCT anesthj-39 80 1 figure figure NOUN anesthj-39 80 2 2 2 NUM anesthj-39 80 3 shows show VERB anesthj-39 80 4 images image NOUN anesthj-39 80 5 revealing reveal VERB anesthj-39 80 6 the the DET anesthj-39 80 7 difficulty difficulty NOUN anesthj-39 80 8 of of ADP anesthj-39 80 9 needle needle NOUN anesthj-39 80 10 visualization visualization NOUN anesthj-39 80 11 during during ADP anesthj-39 80 12 steeper steep ADJ anesthj-39 80 13 needle needle NOUN anesthj-39 80 14 angles angle NOUN anesthj-39 80 15 . . PUNCT anesthj-39 81 1 note note VERB anesthj-39 81 2 that that SCONJ anesthj-39 81 3 in in ADP anesthj-39 81 4 image image NOUN anesthj-39 81 5 a a X anesthj-39 81 6 , , PUNCT anesthj-39 81 7 the the DET anesthj-39 81 8 needle needle NOUN anesthj-39 81 9 shows show VERB anesthj-39 81 10 up up ADP anesthj-39 81 11 displaying display VERB anesthj-39 81 12 strong strong ADJ anesthj-39 81 13 echogenicity echogenicity NOUN anesthj-39 81 14 . . PUNCT anesthj-39 82 1 this this PRON anesthj-39 82 2 is be AUX anesthj-39 82 3 an an DET anesthj-39 82 4 excellent excellent ADJ anesthj-39 82 5 example example NOUN anesthj-39 82 6 of of ADP anesthj-39 82 7 an an DET anesthj-39 82 8 entry entry NOUN anesthj-39 82 9 that that PRON anesthj-39 82 10 is be AUX anesthj-39 82 11 less less ADJ anesthj-39 82 12 than than ADP anesthj-39 82 13 30 30 NUM anesthj-39 82 14 degrees degree NOUN anesthj-39 82 15 . . PUNCT anesthj-39 83 1 image image NOUN anesthj-39 83 2 b b PROPN anesthj-39 83 3 shows show VERB anesthj-39 83 4 the the DET anesthj-39 83 5 same same ADJ anesthj-39 83 6 needle needle NOUN anesthj-39 83 7 on on ADP anesthj-39 83 8 the the DET anesthj-39 83 9 same same ADJ anesthj-39 83 10 patient patient NOUN anesthj-39 83 11 , , PUNCT anesthj-39 83 12 but but CCONJ anesthj-39 83 13 visualization visualization NOUN anesthj-39 83 14 of of ADP anesthj-39 83 15 that that DET anesthj-39 83 16 needle needle NOUN anesthj-39 83 17 is be AUX anesthj-39 83 18 markedly markedly ADV anesthj-39 83 19 decreased decrease VERB anesthj-39 83 20 . . PUNCT anesthj-39 84 1 image image NOUN anesthj-39 84 2 b b PROPN anesthj-39 84 3 shows show VERB anesthj-39 84 4 the the DET anesthj-39 84 5 visual visual ADJ anesthj-39 84 6 loss loss NOUN anesthj-39 84 7 as as SCONJ anesthj-39 84 8 reduced reduce VERB anesthj-39 84 9 echogenicity echogenicity NOUN anesthj-39 84 10 of of ADP anesthj-39 84 11 the the DET anesthj-39 84 12 needle needle NOUN anesthj-39 84 13 shaft shaft NOUN anesthj-39 84 14 at at ADP anesthj-39 84 15 a a DET anesthj-39 84 16 larger large ADJ anesthj-39 84 17 insertion insertion NOUN anesthj-39 84 18 angle angle NOUN anesthj-39 84 19 . . PUNCT anesthj-39 85 1 figure figure NOUN anesthj-39 85 2 1 1 NUM anesthj-39 85 3 needle needle NOUN anesthj-39 85 4 visualization visualization NOUN anesthj-39 85 5 applying apply VERB anesthj-39 85 6 the the DET anesthj-39 85 7 law law NOUN anesthj-39 85 8 of of ADP anesthj-39 85 9 sines sine NOUN anesthj-39 85 10 a a DET anesthj-39 85 11 b b NOUN anesthj-39 85 12 c c NOUN anesthj-39 85 13 probe probe NOUN anesthj-39 85 14 center center NOUN anesthj-39 85 15 1 1 NUM anesthj-39 85 16 cm cm NUM anesthj-39 85 17 2 2 NUM anesthj-39 85 18 cm cm NOUN anesthj-39 85 19 3 3 NUM anesthj-39 85 20 cm cm NOUN anesthj-39 85 21 ? ? PUNCT anesthj-39 86 1 point point NOUN anesthj-39 86 2 of of ADP anesthj-39 86 3 needle needle NOUN anesthj-39 86 4 entry entry NOUN anesthj-39 86 5 30 30 NUM anesthj-39 86 6 degrees degree NOUN anesthj-39 86 7 a a PRON anesthj-39 86 8 / / SYM anesthj-39 86 9 a a DET anesthj-39 86 10 sin= sin= PROPN anesthj-39 86 11 b b PROPN anesthj-39 86 12 / / SYM anesthj-39 86 13 b b PROPN anesthj-39 86 14 sin= sin= PROPN anesthj-39 86 15 c c X anesthj-39 86 16 / / SYM anesthj-39 86 17 c c NOUN anesthj-39 86 18 sin sin NOUN anesthj-39 86 19 target target NOUN anesthj-39 86 20 jonathan jonathan PROPN anesthj-39 86 21 p. p. PROPN anesthj-39 86 22 kline kline PROPN anesthj-39 86 23 , , PUNCT anesthj-39 86 24 crna crna NOUN anesthj-39 86 25 in in ADP anesthj-39 86 26 solving solve VERB anesthj-39 86 27 this this DET anesthj-39 86 28 triangle triangle NOUN anesthj-39 86 29 problem problem NOUN anesthj-39 86 30 , , PUNCT anesthj-39 86 31 we we PRON anesthj-39 86 32 used use VERB anesthj-39 86 33 the the DET anesthj-39 86 34 law law NOUN anesthj-39 86 35 of of ADP anesthj-39 86 36 sines sine NOUN anesthj-39 86 37 . . PUNCT anesthj-39 87 1 although although SCONJ anesthj-39 87 2 there there PRON anesthj-39 87 3 are be VERB anesthj-39 87 4 many many ADJ anesthj-39 87 5 variations variation NOUN anesthj-39 87 6 of of ADP anesthj-39 87 7 this this DET anesthj-39 87 8 solution solution NOUN anesthj-39 87 9 , , PUNCT anesthj-39 87 10 we we PRON anesthj-39 87 11 used use VERB anesthj-39 87 12 a a DET anesthj-39 87 13 simple simple ADJ anesthj-39 87 14 technique technique NOUN anesthj-39 87 15 that that PRON anesthj-39 87 16 allowed allow VERB anesthj-39 87 17 for for ADP anesthj-39 87 18 a a DET anesthj-39 87 19 simple simple ADJ anesthj-39 87 20 formula formula NOUN anesthj-39 87 21 to to PART anesthj-39 87 22 be be AUX anesthj-39 87 23 used use VERB anesthj-39 87 24 based base VERB anesthj-39 87 25 solely solely ADV anesthj-39 87 26 on on ADP anesthj-39 87 27 the the DET anesthj-39 87 28 depth depth NOUN anesthj-39 87 29 of of ADP anesthj-39 87 30 the the DET anesthj-39 87 31 target target NOUN anesthj-39 87 32 structure structure NOUN anesthj-39 87 33 . . PUNCT anesthj-39 88 1 for for ADP anesthj-39 88 2 example example NOUN anesthj-39 88 3 , , PUNCT anesthj-39 88 4 if if SCONJ anesthj-39 88 5 the the DET anesthj-39 88 6 target target NOUN anesthj-39 88 7 structure structure NOUN anesthj-39 88 8 is be AUX anesthj-39 88 9 4 4 NUM anesthj-39 88 10 cm cm NOUN anesthj-39 88 11 in in ADP anesthj-39 88 12 depth depth NOUN anesthj-39 88 13 and and CCONJ anesthj-39 88 14 the the DET anesthj-39 88 15 approach approach NOUN anesthj-39 88 16 can can AUX anesthj-39 88 17 not not PART anesthj-39 88 18 exceed exceed VERB anesthj-39 88 19 30 30 NUM anesthj-39 88 20 degrees degree NOUN anesthj-39 88 21 without without ADP anesthj-39 88 22 signal signal ADJ anesthj-39 88 23 loss loss NOUN anesthj-39 88 24 ( ( PUNCT anesthj-39 88 25 leading lead VERB anesthj-39 88 26 to to ADP anesthj-39 88 27 decreased decrease VERB anesthj-39 88 28 needle needle NOUN anesthj-39 88 29 visualization visualization NOUN anesthj-39 88 30 ) ) PUNCT anesthj-39 88 31 , , PUNCT anesthj-39 88 32 the the DET anesthj-39 88 33 skin skin NOUN anesthj-39 88 34 must must AUX anesthj-39 88 35 be be AUX anesthj-39 88 36 entered enter VERB anesthj-39 88 37 at at ADP anesthj-39 88 38 exactly exactly ADV anesthj-39 88 39 6.92 6.92 NUM anesthj-39 88 40 cm cm NOUN anesthj-39 88 41 from from ADP anesthj-39 88 42 the the DET anesthj-39 88 43 probe probe NOUN anesthj-39 88 44 . . PUNCT anesthj-39 89 1 this this DET anesthj-39 89 2 solution solution NOUN anesthj-39 89 3 is be AUX anesthj-39 89 4 reliable reliable ADJ anesthj-39 89 5 and and CCONJ anesthj-39 89 6 reproducible reproducible VERB anesthj-39 89 7 every every DET anesthj-39 89 8 time time NOUN anesthj-39 89 9 . . PUNCT anesthj-39 90 1 it it PRON anesthj-39 90 2 allows allow VERB anesthj-39 90 3 for for ADP anesthj-39 90 4 a a DET anesthj-39 90 5 simple simple ADJ anesthj-39 90 6 formula formula NOUN anesthj-39 90 7 to to PART anesthj-39 90 8 be be AUX anesthj-39 90 9 incorporated incorporate VERB anesthj-39 90 10 to to PART anesthj-39 90 11 ensure ensure VERB anesthj-39 90 12 successful successful ADJ anesthj-39 90 13 needle needle NOUN anesthj-39 90 14 visualization visualization NOUN anesthj-39 90 15 , , PUNCT anesthj-39 90 16 regardless regardless ADV anesthj-39 90 17 of of ADP anesthj-39 90 18 the the DET anesthj-39 90 19 age age NOUN anesthj-39 90 20 or or CCONJ anesthj-39 90 21 complexity complexity NOUN anesthj-39 90 22 of of ADP anesthj-39 90 23 the the DET anesthj-39 90 24 ultrasound ultrasound NOUN anesthj-39 90 25 machine machine NOUN anesthj-39 90 26 . . PUNCT anesthj-39 91 1 it it PRON anesthj-39 91 2 is be AUX anesthj-39 91 3 important important ADJ anesthj-39 91 4 to to PART anesthj-39 91 5 note note VERB anesthj-39 91 6 that that SCONJ anesthj-39 91 7 the the DET anesthj-39 91 8 center center NOUN anesthj-39 91 9 of of ADP anesthj-39 91 10 the the DET anesthj-39 91 11 probe probe NOUN anesthj-39 91 12 ( ( PUNCT anesthj-39 91 13 not not PART anesthj-39 91 14 the the DET anesthj-39 91 15 edge edge NOUN anesthj-39 91 16 ) ) PUNCT anesthj-39 91 17 is be AUX anesthj-39 91 18 the the DET anesthj-39 91 19 beginning beginning NOUN anesthj-39 91 20 point point NOUN anesthj-39 91 21 for for ADP anesthj-39 91 22 the the DET anesthj-39 91 23 triangle triangle NOUN anesthj-39 91 24 ’s ’s PART anesthj-39 91 25 base base PROPN anesthj-39 91 26 measurement measurement NOUN anesthj-39 91 27 . . PUNCT anesthj-39 92 1 table table NOUN anesthj-39 92 2 1 1 NUM anesthj-39 92 3 presents present VERB anesthj-39 92 4 common common ADJ anesthj-39 92 5 needle needle NOUN anesthj-39 92 6 angle angle NOUN anesthj-39 92 7 distances distance NOUN anesthj-39 92 8 developed develop VERB anesthj-39 92 9 on on ADP anesthj-39 92 10 the the DET anesthj-39 92 11 basis basis NOUN anesthj-39 92 12 of of ADP anesthj-39 92 13 the the DET anesthj-39 92 14 law law NOUN anesthj-39 92 15 of of ADP anesthj-39 92 16 sines sine NOUN anesthj-39 92 17 . . PUNCT anesthj-39 92 18     SPACE anesthj-39 93 1 the the DET anesthj-39 93 2 new new ADJ anesthj-39 93 3 total total ADJ anesthj-39 93 4 distance distance NOUN anesthj-39 93 5 to to ADP anesthj-39 93 6 the the DET anesthj-39 93 7 target target NOUN anesthj-39 93 8 that that SCONJ anesthj-39 93 9 the the DET anesthj-39 93 10 needle needle NOUN anesthj-39 93 11 will will AUX anesthj-39 93 12 have have VERB anesthj-39 93 13 to to PART anesthj-39 93 14 travel travel VERB anesthj-39 93 15 is be AUX anesthj-39 93 16 also also ADV anesthj-39 93 17 included include VERB anesthj-39 93 18 . . PUNCT anesthj-39 94 1 anesthesia anesthesia PROPN anesthj-39 94 2 ejournal ejournal PROPN anesthj-39 94 3 www.anesthesiaejournal.com www.anesthesiaejournal.com PROPN anesthj-39 94 4 volume volume NOUN anesthj-39 94 5 3 3 NUM anesthj-39 94 6 issue issue NOUN anesthj-39 94 7 2 2 NUM anesthj-39 94 8 2015 2015 NUM anesthj-39 94 9 image image NOUN anesthj-39 94 10 b b NOUN anesthj-39 94 11 figure figure NOUN anesthj-39 94 12 2 2 NUM anesthj-39 94 13 . . NUM anesthj-39 94 14 images image NOUN anesthj-39 94 15 a a PRON anesthj-39 94 16 and and CCONJ anesthj-39 94 17 b b NOUN anesthj-39 94 18 are be AUX anesthj-39 94 19 actual actual ADJ anesthj-39 94 20 patient patient NOUN anesthj-39 94 21 ( ( PUNCT anesthj-39 94 22 in in ADP anesthj-39 94 23 vivo vivo NOUN anesthj-39 94 24 ) ) PUNCT anesthj-39 94 25 pictures picture NOUN anesthj-39 94 26 captured capture VERB anesthj-39 94 27 during during ADP anesthj-39 94 28 an an DET anesthj-39 94 29 ultrasound ultrasound NOUN anesthj-39 94 30 - - PUNCT anesthj-39 94 31 guided guide VERB anesthj-39 94 32 regional regional ADJ anesthj-39 94 33 procedure procedure NOUN anesthj-39 94 34 . . PUNCT anesthj-39 95 1 ( ( PUNCT anesthj-39 95 2 images image NOUN anesthj-39 95 3 from from ADP anesthj-39 95 4 jonathan jonathan PROPN anesthj-39 95 5 kline kline PROPN anesthj-39 95 6 , , PUNCT anesthj-39 95 7 crna crna PROPN anesthj-39 95 8 . . PUNCT anesthj-39 95 9 ) ) PUNCT anesthj-39 96 1 image image VERB anesthj-39 96 2 a a DET anesthj-39 96 3 references reference NOUN anesthj-39 96 4 1 1 NUM anesthj-39 96 5 . . PUNCT anesthj-39 96 6 la la PROPN anesthj-39 96 7 grange grange PROPN anesthj-39 96 8 pdp pdp PROPN anesthj-39 96 9 , , PUNCT anesthj-39 96 10 foster foster PROPN anesthj-39 96 11 pa pa PROPN anesthj-39 96 12 , , PUNCT anesthj-39 96 13 pretorius pretorius PROPN anesthj-39 96 14 lk lk PROPN anesthj-39 96 15 . . PROPN anesthj-39 96 16 application application NOUN anesthj-39 96 17 of of ADP anesthj-39 96 18 the the DET anesthj-39 96 19 doppler doppler NOUN anesthj-39 96 20 ultrasound ultrasound NOUN anesthj-39 96 21 blood blood NOUN anesthj-39 96 22 flow flow NOUN anesthj-39 96 23 detector detector NOUN anesthj-39 96 24 in in ADP anesthj-39 96 25 supraclavicular supraclavicular ADJ anesthj-39 96 26 brachial brachial ADJ anesthj-39 96 27 plexus plexus NOUN anesthj-39 96 28 block block NOUN anesthj-39 96 29 . . PUNCT anesthj-39 97 1 br br PROPN anesthj-39 97 2 j j PROPN anesthj-39 97 3 anaesth anaesth PROPN anesthj-39 97 4 . . PUNCT anesthj-39 98 1 1978;50(9):965 1978;50(9):965 PROPN anesthj-39 98 2 - - PUNCT anesthj-39 98 3 967 967 NUM anesthj-39 98 4 . . PUNCT anesthj-39 99 1 http://dx.doi.org/10.1093/bja/50.9.965 http://dx.doi.org/10.1093/bja/50.9.965 NOUN anesthj-39 99 2 . . PUNCT anesthj-39 100 1 2 2 X anesthj-39 100 2 . . X anesthj-39 100 3 marhofer marhofer NOUN anesthj-39 100 4 p p NOUN anesthj-39 100 5 , , PUNCT anesthj-39 100 6 greher greher PROPN anesthj-39 100 7 m m PROPN anesthj-39 100 8 , , PUNCT anesthj-39 100 9 kapral kapral PROPN anesthj-39 100 10 s. s. PROPN anesthj-39 100 11 ultrasound ultrasound PROPN anesthj-39 100 12 guidance guidance NOUN anesthj-39 100 13 in in ADP anesthj-39 100 14 regional regional ADJ anesthj-39 100 15 anaesthesia anaesthesia NOUN anesthj-39 100 16 . . PUNCT anesthj-39 101 1 br br PROPN anesthj-39 101 2 j j PROPN anesthj-39 101 3 anaesth anaesth PROPN anesthj-39 101 4 . . PUNCT anesthj-39 102 1 2005;94(1):7–17 2005;94(1):7–17 X anesthj-39 102 2 . . PUNCT anesthj-39 103 1 doi doi NOUN anesthj-39 103 2 : : PUNCT anesthj-39 103 3 http://dx.doi http://dx.doi PROPN anesthj-39 103 4 . . PUNCT anesthj-39 104 1 org/10.1093 org/10.1093 PROPN anesthj-39 104 2 / / SYM anesthj-39 104 3 bja bja PROPN anesthj-39 104 4 / / SYM anesthj-39 104 5 aei002 aei002 PROPN anesthj-39 104 6 . . PUNCT anesthj-39 104 7 published publish VERB anesthj-39 104 8 online online ADJ anesthj-39 104 9 july july PROPN anesthj-39 104 10 26 26 NUM anesthj-39 104 11 , , PUNCT anesthj-39 104 12 2004 2004 NUM anesthj-39 104 13 . . PUNCT anesthj-39 105 1 3 3 X anesthj-39 105 2 . . X anesthj-39 105 3 chan chan PROPN anesthj-39 105 4 v v PROPN anesthj-39 105 5 , , PUNCT anesthj-39 105 6 perlas perlas PROPN anesthj-39 105 7 a. a. PROPN anesthj-39 105 8 atlas atlas PROPN anesthj-39 105 9 of of ADP anesthj-39 105 10 ultrasound ultrasound NOUN anesthj-39 105 11 - - PUNCT anesthj-39 105 12 guided guide VERB anesthj-39 105 13 procedures procedure NOUN anesthj-39 105 14 in in ADP anesthj-39 105 15 interventional interventional ADJ anesthj-39 105 16 pain pain NOUN anesthj-39 105 17 management management NOUN anesthj-39 105 18 . . PUNCT anesthj-39 106 1 in in ADP anesthj-39 106 2 : : PUNCT anesthj-39 106 3 chan chan PROPN anesthj-39 106 4 v v PROPN anesthj-39 106 5 , , PUNCT anesthj-39 106 6 perlas perlas PROPN anesthj-39 106 7 a. a. NOUN anesthj-39 106 8 basics basic NOUN anesthj-39 106 9 of of ADP anesthj-39 106 10 ultrasound ultrasound ADJ anesthj-39 106 11 imaging imaging NOUN anesthj-39 106 12 . . PUNCT anesthj-39 107 1 new new PROPN anesthj-39 107 2 york york PROPN anesthj-39 107 3 : : PUNCT anesthj-39 107 4 springer springer NOUN anesthj-39 107 5 science science NOUN anesthj-39 107 6 business business NOUN anesthj-39 107 7 media medium NOUN anesthj-39 107 8 ; ; PUNCT anesthj-39 107 9 2011:13 2011:13 NUM anesthj-39 107 10 - - SYM anesthj-39 107 11 19 19 NUM anesthj-39 107 12 . . PUNCT anesthj-39 107 13 doi doi NOUN anesthj-39 107 14 : : PUNCT anesthj-39 107 15 http://dx.doi.org/10.1007/978-1-44191681-5_2 http://dx.doi.org/10.1007/978-1-44191681-5_2 NOUN anesthj-39 107 16 . . PUNCT anesthj-39 108 1 4 4 X anesthj-39 108 2 . . X anesthj-39 108 3 reusz reusz PROPN anesthj-39 108 4 g g PROPN anesthj-39 108 5 , , PUNCT anesthj-39 108 6 sarkany sarkany PROPN anesthj-39 108 7 j j PROPN anesthj-39 108 8 , , PUNCT anesthj-39 108 9 gal gal PROPN anesthj-39 108 10 j j PROPN anesthj-39 108 11 , , PUNCT anesthj-39 108 12 csomos csomos PROPN anesthj-39 108 13 a. a. PROPN anesthj-39 108 14 needle needle PROPN anesthj-39 108 15 - - PUNCT anesthj-39 108 16 related relate VERB anesthj-39 108 17 ultrasound ultrasound NOUN anesthj-39 108 18 artifacts artifact NOUN anesthj-39 108 19 and and CCONJ anesthj-39 108 20 their their PRON anesthj-39 108 21 importance importance NOUN anesthj-39 108 22 in in ADP anesthj-39 108 23 anaesthetic anaesthetic ADJ anesthj-39 108 24 practice practice NOUN anesthj-39 108 25 . . PUNCT anesthj-39 109 1 br br PROPN anesthj-39 109 2 j j PROPN anesthj-39 109 3 anaesth anaesth PROPN anesthj-39 109 4 . . PUNCT anesthj-39 110 1 2014;112(5):794 2014;112(5):794 NUM anesthj-39 110 2 - - SYM anesthj-39 110 3 802 802 NUM anesthj-39 110 4 . . PUNCT anesthj-39 111 1 http://dx.doi.org/10.1093/bja/aet585 http://dx.doi.org/10.1093/bja/aet585 PROPN anesthj-39 111 2 . . PUNCT anesthj-39 112 1 5 5 NUM anesthj-39 112 2 . . X anesthj-39 112 3 schafhalter schafhalter PROPN anesthj-39 112 4 - - PUNCT anesthj-39 112 5 zoppoth zoppoth NOUN anesthj-39 112 6 i i PROPN anesthj-39 112 7 , , PUNCT anesthj-39 112 8 mcculloch mcculloch PROPN anesthj-39 112 9 ce ce PROPN anesthj-39 112 10 , , PUNCT anesthj-39 112 11 gray gray ADJ anesthj-39 112 12 at at ADP anesthj-39 112 13 . . PUNCT anesthj-39 113 1 ultrasound ultrasound PROPN anesthj-39 113 2 visibility visibility NOUN anesthj-39 113 3 of of ADP anesthj-39 113 4 needles needle NOUN anesthj-39 113 5 used use VERB anesthj-39 113 6 for for ADP anesthj-39 113 7 regional regional ADJ anesthj-39 113 8 nerve nerve NOUN anesthj-39 113 9 block block NOUN anesthj-39 113 10 : : PUNCT anesthj-39 113 11 an an DET anesthj-39 113 12 in in ADP anesthj-39 113 13 vitro vitro X anesthj-39 113 14 study study NOUN anesthj-39 113 15 . . PUNCT anesthj-39 114 1 reg reg PROPN anesthj-39 114 2 anesth anesth PROPN anesthj-39 114 3 pain pain NOUN anesthj-39 114 4 med me VERB anesthj-39 114 5 . . PUNCT anesthj-39 115 1 2004;29(5):480 2004;29(5):480 NUM anesthj-39 115 2 - - SYM anesthj-39 115 3 488 488 NUM anesthj-39 115 4 . . PUNCT anesthj-39 116 1 http://dx.doi.org/10.1097/00115550-200409000-00014 http://dx.doi.org/10.1097/00115550-200409000-00014 PROPN anesthj-39 116 2 . . PROPN anesthj-39 117 1 6 6 NUM anesthj-39 117 2 . . PUNCT anesthj-39 117 3 miura miura PROPN anesthj-39 117 4 m m PROPN anesthj-39 117 5 , , PUNCT anesthj-39 117 6 kazuhide kazuhide PROPN anesthj-39 117 7 t t PROPN anesthj-39 117 8 , , PUNCT anesthj-39 117 9 toshiyasu toshiyasu PROPN anesthj-39 117 10 s. s. PROPN anesthj-39 117 11 visibility visibility PROPN anesthj-39 117 12 of of ADP anesthj-39 117 13 ultrasound ultrasound NOUN anesthj-39 117 14 - - PUNCT anesthj-39 117 15 guided guide VERB anesthj-39 117 16 echogenic echogenic NOUN anesthj-39 117 17 needle needle NOUN anesthj-39 117 18 and and CCONJ anesthj-39 117 19 its its PRON anesthj-39 117 20 potential potential NOUN anesthj-39 117 21 in in ADP anesthj-39 117 22 clinical clinical ADJ anesthj-39 117 23 delivery delivery NOUN anesthj-39 117 24 of of ADP anesthj-39 117 25 regional regional ADJ anesthj-39 117 26 anesthesia anesthesia NOUN anesthj-39 117 27 . . PUNCT anesthj-39 118 1 tokai tokai PROPN anesthj-39 118 2 j j PROPN anesthj-39 118 3 exp exp PROPN anesthj-39 118 4 clin clin PROPN anesthj-39 118 5 med med PROPN anesthj-39 118 6 . . PUNCT anesthj-39 119 1 2014;39(2):80 2014;39(2):80 NUM anesthj-39 119 2 - - SYM anesthj-39 119 3 86 86 NUM anesthj-39 119 4 . . PUNCT anesthj-39 120 1 7 7 X anesthj-39 120 2 . . PUNCT anesthj-39 120 3 takatani takatani PROPN anesthj-39 120 4 j j PROPN anesthj-39 120 5 , , PUNCT anesthj-39 120 6 takeshima takeshima NOUN anesthj-39 120 7 n n CCONJ anesthj-39 120 8 , , PUNCT anesthj-39 120 9 okuda okuda PROPN anesthj-39 120 10 k k PROPN anesthj-39 120 11 , , PUNCT anesthj-39 120 12 uchino uchino PROPN anesthj-39 120 13 t t PROPN anesthj-39 120 14 , , PUNCT anesthj-39 120 15 noguchi noguchi PROPN anesthj-39 120 16 t. t. PROPN anesthj-39 120 17 ultrasound ultrasound PROPN anesthj-39 120 18 visibility visibility NOUN anesthj-39 120 19 of of ADP anesthj-39 120 20 regional regional ADJ anesthj-39 120 21 anesthesia anesthesia NOUN anesthj-39 120 22 catheters catheter NOUN anesthj-39 120 23 : : PUNCT anesthj-39 120 24 an an DET anesthj-39 120 25 in in ADP anesthj-39 120 26 vitro vitro X anesthj-39 120 27 study study NOUN anesthj-39 120 28 . . PUNCT anesthj-39 121 1 korean korean PROPN anesthj-39 121 2 j j PROPN anesthj-39 121 3 anesthesiol anesthesiol NOUN anesthj-39 121 4 . . PUNCT anesthj-39 122 1 2012;63(1):59 2012;63(1):59 NUM anesthj-39 122 2 - - SYM anesthj-39 122 3 64 64 NUM anesthj-39 122 4 . . PUNCT anesthj-39 123 1 http://dx.doi.org/10.4097/kjae.2012.63.1.59 http://dx.doi.org/10.4097/kjae.2012.63.1.59 X anesthj-39 123 2 . . PUNCT anesthj-39 124 1 anesthesia anesthesia PROPN anesthj-39 124 2 ejournal ejournal PROPN anesthj-39 124 3 www.anesthesiaejournal.com www.anesthesiaejournal.com PROPN anesthj-39 124 4 volume volume NOUN anesthj-39 124 5 3 3 NUM anesthj-39 124 6 issue issue NOUN anesthj-39 124 7 2 2 NUM anesthj-39 124 8 2015 2015 NUM anesthj-39 124 9 table table NOUN anesthj-39 124 10 1 1 NUM anesthj-39 124 11 . . PUNCT anesthj-39 124 12 application application NOUN anesthj-39 124 13 chart chart NOUN anesthj-39 124 14 of of ADP anesthj-39 124 15 the the DET anesthj-39 124 16 law law NOUN anesthj-39 124 17 of of ADP anesthj-39 124 18 sines sine NOUN anesthj-39 124 19 for for ADP anesthj-39 124 20 increased increase VERB anesthj-39 124 21 needle needle NOUN anesthj-39 124 22 visibility visibility NOUN anesthj-39 124 23 during during ADP anesthj-39 124 24 ultrasound ultrasound NOUN anesthj-39 124 25 - - PUNCT anesthj-39 124 26 guided guide VERB anesthj-39 124 27 regional regional ADJ anesthj-39 124 28 procedures procedure NOUN anesthj-39 124 29 discussion discussion NOUN anesthj-39 124 30 the the DET anesthj-39 124 31 benefits benefit NOUN anesthj-39 124 32 of of ADP anesthj-39 124 33 incorporating incorporate VERB anesthj-39 124 34 this this DET anesthj-39 124 35 chart chart NOUN anesthj-39 124 36 into into ADP anesthj-39 124 37 clinical clinical ADJ anesthj-39 124 38 use use NOUN anesthj-39 124 39 are be AUX anesthj-39 124 40 straightforward straightforward ADJ anesthj-39 124 41 . . PUNCT anesthj-39 125 1 allowing allow VERB anesthj-39 125 2 users user NOUN anesthj-39 125 3 to to PART anesthj-39 125 4 see see VERB anesthj-39 125 5 needles needle NOUN anesthj-39 125 6 , , PUNCT anesthj-39 125 7 even even ADV anesthj-39 125 8 during during ADP anesthj-39 125 9 deep deep ADJ anesthj-39 125 10 structure structure NOUN anesthj-39 125 11 targeting target VERB anesthj-39 125 12 , , PUNCT anesthj-39 125 13 may may AUX anesthj-39 125 14 allow allow VERB anesthj-39 125 15 for for ADP anesthj-39 125 16 increased increase VERB anesthj-39 125 17 safety safety NOUN anesthj-39 125 18 and and CCONJ anesthj-39 125 19 effectiveness effectiveness NOUN anesthj-39 125 20 for for ADP anesthj-39 125 21 every every DET anesthj-39 125 22 technique technique NOUN anesthj-39 125 23 . . PUNCT anesthj-39 126 1 the the DET anesthj-39 126 2 formula formula NOUN anesthj-39 126 3 is be AUX anesthj-39 126 4 simple simple ADJ anesthj-39 126 5 to to PART anesthj-39 126 6 incorporate incorporate VERB anesthj-39 126 7 and and CCONJ anesthj-39 126 8 requires require VERB anesthj-39 126 9 only only ADV anesthj-39 126 10 one one NUM anesthj-39 126 11 piece piece NOUN anesthj-39 126 12 of of ADP anesthj-39 126 13 information information NOUN anesthj-39 126 14 to to PART anesthj-39 126 15 use use VERB anesthj-39 126 16 . . PUNCT anesthj-39 127 1 this this DET anesthj-39 127 2 piece piece NOUN anesthj-39 127 3 of of ADP anesthj-39 127 4 information information NOUN anesthj-39 127 5 is be AUX anesthj-39 127 6 the the DET anesthj-39 127 7 depth depth NOUN anesthj-39 127 8 of of ADP anesthj-39 127 9 the the DET anesthj-39 127 10 target target NOUN anesthj-39 127 11 structure structure NOUN anesthj-39 127 12 . . PUNCT anesthj-39 128 1 the the DET anesthj-39 128 2 depth depth NOUN anesthj-39 128 3 is be AUX anesthj-39 128 4 available available ADJ anesthj-39 128 5 on on ADP anesthj-39 128 6 most most ADJ anesthj-39 128 7 clinical clinical ADJ anesthj-39 128 8 ultrasounds ultrasound NOUN anesthj-39 128 9 in in ADP anesthj-39 128 10 use use NOUN anesthj-39 128 11 today today NOUN anesthj-39 128 12 . . PUNCT anesthj-39 129 1 as as SCONJ anesthj-39 129 2 an an DET anesthj-39 129 3 added add VERB anesthj-39 129 4 , , PUNCT anesthj-39 129 5 albeit albeit SCONJ anesthj-39 129 6 unforeseen unforeseen ADJ anesthj-39 129 7 benefit benefit NOUN anesthj-39 129 8 of of ADP anesthj-39 129 9 this this DET anesthj-39 129 10 discovery discovery NOUN anesthj-39 129 11 , , PUNCT anesthj-39 129 12 the the DET anesthj-39 129 13 chart chart NOUN anesthj-39 129 14 also also ADV anesthj-39 129 15 reveals reveal VERB anesthj-39 129 16 not not PART anesthj-39 129 17 only only ADV anesthj-39 129 18 the the DET anesthj-39 129 19 point point NOUN anesthj-39 129 20 of of ADP anesthj-39 129 21 entry entry NOUN anesthj-39 129 22 that that PRON anesthj-39 129 23 will will AUX anesthj-39 129 24 enhance enhance VERB anesthj-39 129 25 needle needle NOUN anesthj-39 129 26 visibility visibility NOUN anesthj-39 129 27 but but CCONJ anesthj-39 129 28 also also ADV anesthj-39 129 29 the the DET anesthj-39 129 30 total total ADJ anesthj-39 129 31 distance distance NOUN anesthj-39 129 32 the the DET anesthj-39 129 33 needle needle NOUN anesthj-39 129 34 will will AUX anesthj-39 129 35 be be AUX anesthj-39 129 36 required require VERB anesthj-39 129 37 to to PART anesthj-39 129 38 travel travel VERB anesthj-39 129 39 . . PUNCT anesthj-39 130 1 this this PRON anesthj-39 130 2 will will AUX anesthj-39 130 3 simplify simplify VERB anesthj-39 130 4 needle needle NOUN anesthj-39 130 5 length length NOUN anesthj-39 130 6 selection selection NOUN anesthj-39 130 7 before before ADP anesthj-39 130 8 the the DET anesthj-39 130 9 start start NOUN anesthj-39 130 10 of of ADP anesthj-39 130 11 a a DET anesthj-39 130 12 procedure procedure NOUN anesthj-39 130 13 . . PUNCT anesthj-39 130 14     SPACE anesthj-39 131 1 some some DET anesthj-39 131 2 problems problem NOUN anesthj-39 131 3 may may AUX anesthj-39 131 4 be be AUX anesthj-39 131 5 associated associate VERB anesthj-39 131 6 with with ADP anesthj-39 131 7 this this DET anesthj-39 131 8 technique technique NOUN anesthj-39 131 9 . . PUNCT anesthj-39 132 1 this this DET anesthj-39 132 2 chart chart NOUN anesthj-39 132 3 or or CCONJ anesthj-39 132 4 technique technique NOUN anesthj-39 132 5 is be AUX anesthj-39 132 6 difficult difficult ADJ anesthj-39 132 7 to to PART anesthj-39 132 8 use use VERB anesthj-39 132 9 if if SCONJ anesthj-39 132 10 the the DET anesthj-39 132 11 probe probe NOUN anesthj-39 132 12 is be AUX anesthj-39 132 13 placed place VERB anesthj-39 132 14 in in ADP anesthj-39 132 15 a a DET anesthj-39 132 16 position position NOUN anesthj-39 132 17 that that PRON anesthj-39 132 18 may may AUX anesthj-39 132 19 be be AUX anesthj-39 132 20 difficult difficult ADJ anesthj-39 132 21 to to PART anesthj-39 132 22 measure measure VERB anesthj-39 132 23 accurately accurately ADV anesthj-39 132 24 . . PUNCT anesthj-39 133 1 also also ADV anesthj-39 133 2 , , PUNCT anesthj-39 133 3 the the DET anesthj-39 133 4 region region NOUN anesthj-39 133 5 must must AUX anesthj-39 133 6 be be AUX anesthj-39 133 7 relatively relatively ADV anesthj-39 133 8 flat flat ADJ anesthj-39 133 9 in in ADP anesthj-39 133 10 order order NOUN anesthj-39 133 11 to to PART anesthj-39 133 12 ensure ensure VERB anesthj-39 133 13 relative relative ADJ anesthj-39 133 14 accuracy accuracy NOUN anesthj-39 133 15 of of ADP anesthj-39 133 16 the the DET anesthj-39 133 17 formula formula NOUN anesthj-39 133 18 . . PUNCT anesthj-39 134 1 the the DET anesthj-39 134 2 technique technique NOUN anesthj-39 134 3 described describe VERB anesthj-39 134 4 to to PART anesthj-39 134 5 increase increase VERB anesthj-39 134 6 visualization visualization NOUN anesthj-39 134 7 dictates dictate VERB anesthj-39 134 8 the the DET anesthj-39 134 9 distance distance NOUN anesthj-39 134 10 that that SCONJ anesthj-39 134 11 the the DET anesthj-39 134 12 needle needle NOUN anesthj-39 134 13 must must AUX anesthj-39 134 14 be be AUX anesthj-39 134 15 placed place VERB anesthj-39 134 16 from from ADP anesthj-39 134 17 the the DET anesthj-39 134 18 probe probe NOUN anesthj-39 134 19 . . PUNCT anesthj-39 135 1 as as SCONJ anesthj-39 135 2 the the DET anesthj-39 135 3 target target NOUN anesthj-39 135 4 depth depth NOUN anesthj-39 135 5 increases increase NOUN anesthj-39 135 6 ( ( PUNCT anesthj-39 135 7 albeit albeit SCONJ anesthj-39 135 8 beyond beyond ADP anesthj-39 135 9 most most ADJ anesthj-39 135 10 common common ADJ anesthj-39 135 11 clinical clinical ADJ anesthj-39 135 12 depths depth NOUN anesthj-39 135 13 ) ) PUNCT anesthj-39 135 14 , , PUNCT anesthj-39 135 15 such such ADJ anesthj-39 135 16 as as ADP anesthj-39 135 17 beyond beyond ADP anesthj-39 135 18 6.5 6.5 NUM anesthj-39 135 19 cm cm NOUN anesthj-39 135 20 , , PUNCT anesthj-39 135 21 needles needle VERB anesthj-39 135 22 greater great ADJ anesthj-39 135 23 than than ADP anesthj-39 135 24 10 10 NUM anesthj-39 135 25 cm cm NOUN anesthj-39 135 26 must must AUX anesthj-39 135 27 be be AUX anesthj-39 135 28 used use VERB anesthj-39 135 29 . . PUNCT anesthj-39 136 1 this this PRON anesthj-39 136 2 may may AUX anesthj-39 136 3 represent represent VERB anesthj-39 136 4 a a DET anesthj-39 136 5 special special ADJ anesthj-39 136 6 order order NOUN anesthj-39 136 7 item item NOUN anesthj-39 136 8 and and CCONJ anesthj-39 136 9 may may AUX anesthj-39 136 10 therefore therefore ADV anesthj-39 136 11 increase increase VERB anesthj-39 136 12 cost cost NOUN anesthj-39 136 13 or or CCONJ anesthj-39 136 14 exclude exclude VERB anesthj-39 136 15 use use NOUN anesthj-39 136 16 of of ADP anesthj-39 136 17 the the DET anesthj-39 136 18 technique technique NOUN anesthj-39 136 19 by by ADP anesthj-39 136 20 centers center NOUN anesthj-39 136 21 that that PRON anesthj-39 136 22 lack lack VERB anesthj-39 136 23 the the DET anesthj-39 136 24 necessary necessary ADJ anesthj-39 136 25 needle needle NOUN anesthj-39 136 26 length length NOUN anesthj-39 136 27 . . PUNCT anesthj-39 137 1 increased increase VERB anesthj-39 137 2 needle needle NOUN anesthj-39 137 3 distances distance NOUN anesthj-39 137 4 may may AUX anesthj-39 137 5 become become VERB anesthj-39 137 6 uncomfortable uncomfortable ADJ anesthj-39 137 7 for for ADP anesthj-39 137 8 the the DET anesthj-39 137 9 patient patient NOUN anesthj-39 137 10 , , PUNCT anesthj-39 137 11 because because SCONJ anesthj-39 137 12 it it PRON anesthj-39 137 13 will will AUX anesthj-39 137 14 become become VERB anesthj-39 137 15 difficult difficult ADJ anesthj-39 137 16 to to PART anesthj-39 137 17 localize localize VERB anesthj-39 137 18 an an DET anesthj-39 137 19 area area NOUN anesthj-39 137 20 at at ADP anesthj-39 137 21 great great ADJ anesthj-39 137 22 depth depth NOUN anesthj-39 137 23 from from ADP anesthj-39 137 24 the the DET anesthj-39 137 25 projected project VERB anesthj-39 137 26 needle needle NOUN anesthj-39 137 27 insertion insertion NOUN anesthj-39 137 28 site site NOUN anesthj-39 137 29 . . PUNCT anesthj-39 138 1 it it PRON anesthj-39 138 2 is be AUX anesthj-39 138 3 difficult difficult ADJ anesthj-39 138 4 to to PART anesthj-39 138 5 assess assess VERB anesthj-39 138 6 or or CCONJ anesthj-39 138 7 predict predict VERB anesthj-39 138 8 patient patient ADJ anesthj-39 138 9 comfort comfort NOUN anesthj-39 138 10 in in ADP anesthj-39 138 11 this this DET anesthj-39 138 12 arena arena NOUN anesthj-39 138 13 , , PUNCT anesthj-39 138 14 but but CCONJ anesthj-39 138 15 an an DET anesthj-39 138 16 adequate adequate ADJ anesthj-39 138 17 volume volume NOUN anesthj-39 138 18 of of ADP anesthj-39 138 19 a a DET anesthj-39 138 20 fast fast ADV anesthj-39 138 21 - - PUNCT anesthj-39 138 22 acting act VERB anesthj-39 138 23 , , PUNCT anesthj-39 138 24 dilute dilute VERB anesthj-39 138 25 local local ADJ anesthj-39 138 26 anesthetic anesthetic NOUN anesthj-39 138 27 to to ADP anesthj-39 138 28 the the DET anesthj-39 138 29 projected project VERB anesthj-39 138 30 needle needle NOUN anesthj-39 138 31 path path NOUN anesthj-39 138 32 may may AUX anesthj-39 138 33 prove prove VERB anesthj-39 138 34 more more ADV anesthj-39 138 35 comfortable comfortable ADJ anesthj-39 138 36 for for ADP anesthj-39 138 37 patients patient NOUN anesthj-39 138 38 having have VERB anesthj-39 138 39 deep deep ADJ anesthj-39 138 40 injections injection NOUN anesthj-39 138 41 . . PUNCT anesthj-39 139 1 another another DET anesthj-39 139 2 obvious obvious ADJ anesthj-39 139 3 deficit deficit NOUN anesthj-39 139 4 in in ADP anesthj-39 139 5 this this DET anesthj-39 139 6 chart chart NOUN anesthj-39 139 7 is be AUX anesthj-39 139 8 the the DET anesthj-39 139 9 lack lack NOUN anesthj-39 139 10 of of ADP anesthj-39 139 11 necessary necessary ADJ anesthj-39 139 12 information information NOUN anesthj-39 139 13 regarding regard VERB anesthj-39 139 14 targets target NOUN anesthj-39 139 15 greater great ADJ anesthj-39 139 16 than than ADP anesthj-39 139 17 10 10 NUM anesthj-39 139 18 cm cm NOUN anesthj-39 139 19 . . PUNCT anesthj-39 140 1 however however ADV anesthj-39 140 2 , , PUNCT anesthj-39 140 3 it it PRON anesthj-39 140 4 would would AUX anesthj-39 140 5 be be AUX anesthj-39 140 6 rare rare ADJ anesthj-39 140 7 for for SCONJ anesthj-39 140 8 a a DET anesthj-39 140 9 patient patient NOUN anesthj-39 140 10 to to PART anesthj-39 140 11 require require VERB anesthj-39 140 12 an an DET anesthj-39 140 13 injection injection NOUN anesthj-39 140 14 or or CCONJ anesthj-39 140 15 vessel vessel NOUN anesthj-39 140 16 access access NOUN anesthj-39 140 17 at at ADP anesthj-39 140 18 this this DET anesthj-39 140 19 depth depth NOUN anesthj-39 140 20 without without ADP anesthj-39 140 21 another another DET anesthj-39 140 22 more more ADV anesthj-39 140 23 feasible feasible ADJ anesthj-39 140 24 alternative alternative NOUN anesthj-39 140 25 . . PUNCT anesthj-39 141 1 we we PRON anesthj-39 141 2 recommend recommend VERB anesthj-39 141 3 a a DET anesthj-39 141 4 formulated formulated ADJ anesthj-39 141 5 study study NOUN anesthj-39 141 6 to to PART anesthj-39 141 7 formalize formalize VERB anesthj-39 141 8 these these DET anesthj-39 141 9 theoretical theoretical ADJ anesthj-39 141 10 suggestions suggestion NOUN anesthj-39 141 11 . . PUNCT anesthj-39 142 1 conclusion conclusion NOUN anesthj-39 142 2 ultrasound ultrasound NOUN anesthj-39 142 3 guidance guidance NOUN anesthj-39 142 4 has have AUX anesthj-39 142 5 promoted promote VERB anesthj-39 142 6 increased increase VERB anesthj-39 142 7 effectiveness effectiveness NOUN anesthj-39 142 8 , , PUNCT anesthj-39 142 9 and and CCONJ anesthj-39 142 10 to to ADP anesthj-39 142 11 some some DET anesthj-39 142 12 degree degree NOUN anesthj-39 142 13 safety safety NOUN anesthj-39 142 14 , , PUNCT anesthj-39 142 15 during during ADP anesthj-39 142 16 regional regional ADJ anesthj-39 142 17 anesthesia anesthesia NOUN anesthj-39 142 18 techniques technique NOUN anesthj-39 142 19 and and CCONJ anesthj-39 142 20 vascular vascular VERB anesthj-39 142 21 access.12 access.12 NOUN anesthj-39 142 22 we we PRON anesthj-39 142 23 sought seek VERB anesthj-39 142 24 to to PART anesthj-39 142 25 produce produce VERB anesthj-39 142 26 and and CCONJ anesthj-39 142 27 describe describe VERB anesthj-39 142 28 a a DET anesthj-39 142 29 technique technique NOUN anesthj-39 142 30 that that PRON anesthj-39 142 31 would would AUX anesthj-39 142 32 simplify simplify VERB anesthj-39 142 33 anesthesia anesthesia NOUN anesthj-39 142 34 providers provider NOUN anesthj-39 142 35 ’ ' PUNCT anesthj-39 142 36 attempts attempt VERB anesthj-39 142 37 to to PART anesthj-39 142 38 visualize visualize VERB anesthj-39 142 39 needles needle NOUN anesthj-39 142 40 during during ADP anesthj-39 142 41 any any DET anesthj-39 142 42 regional regional ADJ anesthj-39 142 43 or or CCONJ anesthj-39 142 44 vascular vascular ADJ anesthj-39 142 45 procedure procedure NOUN anesthj-39 142 46 . . PUNCT anesthj-39 143 1 we we PRON anesthj-39 143 2 determined determine VERB anesthj-39 143 3 that that SCONJ anesthj-39 143 4 by by ADP anesthj-39 143 5 use use NOUN anesthj-39 143 6 of of ADP anesthj-39 143 7 the the DET anesthj-39 143 8 law law NOUN anesthj-39 143 9 of of ADP anesthj-39 143 10 sines sine NOUN anesthj-39 143 11 , , PUNCT anesthj-39 143 12 a a DET anesthj-39 143 13 simple simple ADJ anesthj-39 143 14 distance distance NOUN anesthj-39 143 15 could could AUX anesthj-39 143 16 reliably reliably ADV anesthj-39 143 17 be be AUX anesthj-39 143 18 used use VERB anesthj-39 143 19 to to PART anesthj-39 143 20 increase increase VERB anesthj-39 143 21 needle needle NOUN anesthj-39 143 22 visualization visualization NOUN anesthj-39 143 23 during during ADP anesthj-39 143 24 ultrasound ultrasound NOUN anesthj-39 143 25 - - PUNCT anesthj-39 143 26 guided guide VERB anesthj-39 143 27 regional regional ADJ anesthj-39 143 28 procedures procedure NOUN anesthj-39 143 29 . . PUNCT anesthj-39 144 1 to to PART anesthj-39 144 2 use use VERB anesthj-39 144 3 this this DET anesthj-39 144 4 chart chart NOUN anesthj-39 144 5 , , PUNCT anesthj-39 144 6 one one NUM anesthj-39 144 7 only only ADV anesthj-39 144 8 needs need VERB anesthj-39 144 9 to to PART anesthj-39 144 10 know know VERB anesthj-39 144 11 the the DET anesthj-39 144 12 target target NOUN anesthj-39 144 13 depth depth NOUN anesthj-39 144 14 , , PUNCT anesthj-39 144 15 and and CCONJ anesthj-39 144 16 this this PRON anesthj-39 144 17 seems seem VERB anesthj-39 144 18 to to PART anesthj-39 144 19 be be AUX anesthj-39 144 20 available available ADJ anesthj-39 144 21 on on ADP anesthj-39 144 22 most most ADV anesthj-39 144 23 clinically clinically ADV anesthj-39 144 24 used use VERB anesthj-39 144 25 ultrasound ultrasound NOUN anesthj-39 144 26 systems system NOUN anesthj-39 144 27 . . PUNCT anesthj-39 145 1 as as SCONJ anesthj-39 145 2 shown show VERB anesthj-39 145 3 in in ADP anesthj-39 145 4 the the DET anesthj-39 145 5 table table NOUN anesthj-39 145 6 , , PUNCT anesthj-39 145 7 many many ADJ anesthj-39 145 8 clinically clinically ADV anesthj-39 145 9 relevant relevant ADJ anesthj-39 145 10 depths depth NOUN anesthj-39 145 11 to to PART anesthj-39 145 12 target target VERB anesthj-39 145 13 structures structure NOUN anesthj-39 145 14 ( ( PUNCT anesthj-39 145 15 ranging range VERB anesthj-39 145 16 from from ADP anesthj-39 145 17 2 2 NUM anesthj-39 145 18 to to ADP anesthj-39 145 19 10 10 NUM anesthj-39 145 20 cm cm NOUN anesthj-39 145 21 ) ) PUNCT anesthj-39 145 22 can can AUX anesthj-39 145 23 be be AUX anesthj-39 145 24 used use VERB anesthj-39 145 25 with with ADP anesthj-39 145 26 reliable reliable ADJ anesthj-39 145 27 results result NOUN anesthj-39 145 28 . . PUNCT anesthj-39 146 1 these these DET anesthj-39 146 2 results result NOUN anesthj-39 146 3 lead lead VERB anesthj-39 146 4 to to ADP anesthj-39 146 5 increased increase VERB anesthj-39 146 6 needle needle NOUN anesthj-39 146 7 visualization visualization NOUN anesthj-39 146 8 with with ADP anesthj-39 146 9 the the DET anesthj-39 146 10 most most ADV anesthj-39 146 11 primitive primitive ADJ anesthj-39 146 12 to to ADP anesthj-39 146 13 the the DET anesthj-39 146 14 most most ADV anesthj-39 146 15 complex complex ADJ anesthj-39 146 16 ultrasound ultrasound NOUN anesthj-39 146 17 systems system NOUN anesthj-39 146 18 . . PUNCT anesthj-39 146 19     SPACE anesthj-39 147 1 acknowledgments acknowledgment NOUN anesthj-39 147 2 special special ADJ anesthj-39 147 3 thanks thank NOUN anesthj-39 147 4 to to ADP anesthj-39 147 5 bill bill PROPN anesthj-39 147 6 gordan gordan PROPN anesthj-39 147 7 , , PUNCT anesthj-39 147 8 crna crna PROPN anesthj-39 147 9 , , PUNCT anesthj-39 147 10 for for ADP anesthj-39 147 11 his his PRON anesthj-39 147 12 assistance assistance NOUN anesthj-39 147 13 with with ADP anesthj-39 147 14 this this DET anesthj-39 147 15 article article NOUN anesthj-39 147 16 . . PUNCT