{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T15:40:19Z","timestamp":1790782819327,"version":"4.1.0"},"reference-count":11,"publisher":"Springer Science and Business Media LLC","issue":"4","license":[{"start":{"date-parts":[[2024,12,2]],"date-time":"2024-12-02T00:00:00Z","timestamp":1733097600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2024,12,2]],"date-time":"2024-12-02T00:00:00Z","timestamp":1733097600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["J Anesth"],"published-print":{"date-parts":[[2025,8]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>The obturator nerve variably gives off the anterior, posterior, and hip articular branches along its course; however, all branches invariably pass through the obturator canal. Herein, we describe our obturator nerve block technique, which promises to deliver local anesthetic directly into the obturator canal. We performed the obturator nerve block in six patients undergoing transurethral resection of bladder tumor under spinal anesthesia. We also evaluated the spread of dye in a cadaver. With patient placed in the lithotomy position, a linear ultrasound transducer was placed on the anterior part of the genitofemoral sulcus, oriented cephalad, to observe the external orifice of the obturator canal, which is present immediately posterior to the posterior end of the inferior margin of the superior pubic ramus and just medial to the body of the ischium. The needle tip was guided to this location, and 10\u00a0ml of 1.5% lidocaine was injected into the obturator canal. The procedure was repeated using 10-ml dye in a cadaver. No obturator jerks were observed during the transurethral resection of bladder tumors in all six cases. Cadaver examination confirmed the dye stained the obturator nerve, with retrograde spread into the pelvic cavity via the obturator canal.<\/jats:p>","DOI":"10.1007\/s00540-024-03434-1","type":"journal-article","created":{"date-parts":[[2024,12,1]],"date-time":"2024-12-01T22:07:10Z","timestamp":1733090830000},"page":"652-656","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Ultrasound-guided obturator nerve block technique at the distal end of the obturator canal: case series and cadaver evaluation"],"prefix":"10.1007","volume":"39","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5083-894X","authenticated-orcid":false,"given":"Takayuki","family":"Yoshida","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yousuke","family":"Nakano","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masaaki","family":"Kitada","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tatsuo","family":"Nakamoto","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2024,12,2]]},"reference":[{"key":"3434_CR1","doi-asserted-by":"publisher","first-page":"33","DOI":"10.1097\/AAP.0b013e3181933b51","volume":"34","author":"S Anagnostopoulou","year":"2009","unstructured":"Anagnostopoulou S, Kostopanagiotou G, Paraskeuopoulos T, Chantzi C, Lolis E, Saranteas T. Anatomic variations of the obturator nerve in the inguinal region: implications in conventional and ultrasound regional anesthesia techniques. Reg Anesth Pain Med. 2009;34:33\u20139.","journal-title":"Reg Anesth Pain Med"},{"key":"3434_CR2","doi-asserted-by":"publisher","first-page":"236","DOI":"10.1213\/ANE.0b013e318237fb40","volume":"114","author":"AM Taha","year":"2012","unstructured":"Taha AM. Brief reports: ultrasound-guided obturator nerve block: a proximal interfascial technique. Anesth Analg. 2012;114:236\u20139.","journal-title":"Anesth Analg"},{"key":"3434_CR3","doi-asserted-by":"publisher","first-page":"1037","DOI":"10.1213\/ane.0b013e3181966f03","volume":"108","author":"T Akkaya","year":"2009","unstructured":"Akkaya T, Ozturk E, Comert A, Ates Y, Gumus H, Ozturk H, Tekdemir I, Elhan A. Ultrasound-guided obturator nerve block: a sonoanatomic study of a new methodologic approach. Anesth Analg. 2009;108:1037\u201341.","journal-title":"Anesth Analg"},{"key":"3434_CR4","doi-asserted-by":"publisher","first-page":"337","DOI":"10.1093\/bja\/aeu467","volume":"114","author":"JA Lin","year":"2015","unstructured":"Lin JA, Nakamoto T, Yeh SD. Ultrasound standard for obturator nerve block: the modified Taha\u2019s approach. Br J Anaesth. 2015;114:337\u20139.","journal-title":"Br J Anaesth"},{"key":"3434_CR5","doi-asserted-by":"publisher","first-page":"291","DOI":"10.1111\/anae.13336","volume":"71","author":"T Yoshida","year":"2016","unstructured":"Yoshida T, Onishi T, Furutani K, Baba H. A new ultrasound-guided pubic approach for proximal obturator nerve block: clinical study and cadaver evaluation. Anaesthesia. 2016;71:291\u20137.","journal-title":"Anaesthesia"},{"key":"3434_CR6","doi-asserted-by":"publisher","first-page":"7023750","DOI":"10.1155\/2017\/7023750","volume":"2017","author":"T Yoshida","year":"2017","unstructured":"Yoshida T, Nakamoto T, Kamibayashi T. Ultrasound-guided obturator nerve block: a focused review on anatomy and updated techniques. Biomed Res Int. 2017;2017:7023750.","journal-title":"Biomed Res Int"},{"key":"3434_CR7","doi-asserted-by":"publisher","first-page":"357","DOI":"10.1097\/AAP.0000000000000587","volume":"42","author":"TD Nielsen","year":"2017","unstructured":"Nielsen TD, Moriggl B, Soballe K, Kolsen-Petersen JA, Borglum J, Bendtsen TF. A cadaveric study of ultrasound-guided subpectineal injectate spread around the obturator nerve and its hip articular branches. Reg Anesth Pain Med. 2017;42:357\u201361.","journal-title":"Reg Anesth Pain Med"},{"key":"3434_CR8","doi-asserted-by":"publisher","first-page":"383","DOI":"10.1007\/s00540-022-03055-6","volume":"36","author":"T Uchino","year":"2022","unstructured":"Uchino T, Miura M, Matsumoto S, Shingu C, Shin T, Tomonari K, Kitano T. Comparison of three obturator nerve block techniques for injectate spread into the obturator canal: a randomized controlled trial. J Anesth. 2022;36:383\u20139.","journal-title":"J Anesth"},{"key":"3434_CR9","doi-asserted-by":"publisher","first-page":"197","DOI":"10.1016\/S0940-9602(11)80347-X","volume":"174","author":"W Thiel","year":"1992","unstructured":"Thiel W. An arterial substance for subsequent injection during the preservation of the whole corpse. Ann Anat. 1992;174:197\u2013200.","journal-title":"Ann Anat"},{"key":"3434_CR10","doi-asserted-by":"publisher","first-page":"185","DOI":"10.1016\/S0940-9602(11)80346-8","volume":"174","author":"W Thiel","year":"1992","unstructured":"Thiel W. The preservation of the whole corpse with natural color. Ann Anat. 1992;174:185\u201395.","journal-title":"Ann Anat"},{"key":"3434_CR11","doi-asserted-by":"publisher","first-page":"495","DOI":"10.1007\/s00276-008-0358-x","volume":"30","author":"S Kendir","year":"2008","unstructured":"Kendir S, Akkaya T, Comert A, Sayin M, Tatlisumak E, Elhan A, Tekdemir I. The location of the obturator nerve: a three-dimensional description of the obturator canal. Surg Radiol Anat. 2008;30:495\u2013501.","journal-title":"Surg Radiol Anat"}],"container-title":["Journal of Anesthesia"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s00540-024-03434-1.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/article\/10.1007\/s00540-024-03434-1\/fulltext.html","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s00540-024-03434-1.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,9,6]],"date-time":"2025-09-06T01:24:34Z","timestamp":1757121874000},"score":1,"resource":{"primary":{"URL":"https:\/\/link.springer.com\/10.1007\/s00540-024-03434-1"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,12,2]]},"references-count":11,"journal-issue":{"issue":"4","published-print":{"date-parts":[[2025,8]]}},"alternative-id":["3434"],"URL":"https:\/\/doi.org\/10.1007\/s00540-024-03434-1","relation":{},"ISSN":["0913-8668","1438-8359"],"issn-type":[{"value":"0913-8668","type":"print"},{"value":"1438-8359","type":"electronic"}],"subject":[],"published":{"date-parts":[[2024,12,2]]},"assertion":[{"value":"15 August 2024","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"10 November 2024","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"2 December 2024","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"No external funding and no conflict of interests declared.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}}]}}