Trial reportJournal of anesthesia2022
Comparison of three obturator nerve block techniques for injectate spread into the obturator canal: a randomized controlled trial.
Trial report in Journal of anesthesia, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
What it found
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The trial behind it
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Who cites it
6 citing papers in PubMed, 6 citations in OpenAlex.
- Ultrasound versus nerve stimulation-guided interadductor approach for obturator nerve block: evaluation of injectate spread into the obturator canal in a randomized controlled trial.BMC anesthesiology · 2026Trial
- Cadaveric investigation of an ultrasound-guided obturator canal approach for obturator nerve block.Korean journal of anesthesiology · 2026Article
- Anatomical variations of the external obturator muscle and their impact on injectate spread to the obturator canal: a cadaveric study related to ultrasound-guided proximal obturator nerve block.Journal of anesthesia · 2026Article
- Ultrasound-guided obturator nerve block technique at the distal end of the obturator canal: case series and cadaver evaluation.Journal of anesthesia · 2025Article
- Efficacy of a pubic superior ramus approach versus a distal approach for obturator nerve block in transurethral bladder tumor resection: a randomized controlled trial.American journal of translational research · 2025Article
- Application value of extreme flexion and abduction hip combined with stirrup-shaped multifunctional leg frame in blocking obturator nerve reflex in transurethral resection of bladder tumor.International urology and nephrology · 2024Article
Corrections and comments
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Authors and funding
7 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeThe obturator nerve branches into the obturator canal; therefore, local anesthetic spread into the obturator canal predicts the success of the obturator nerve block (ONB). We compared three ONB techniques for the spread of local anesthetic mixed with contrast medium into the obturator canal.
methodsWe performed the ONB using the classical pubic approach (PA), inguinal approach (IA), or ultrasound-guided methodologic approach (UMA) in 143 patients undergoing transurethral resection of bladder tumors. The obturator nerve course and branching patterns of the UMA group were examined using ultrasound imaging. After injecting a local anesthetic mixed with a contrast medium, we evaluated its spread into the obturator canal using fluoroscopic imaging. P < 0.05 indicated statistical significance.
resultsSuccess rate of obturator canal enhancement was the greatest in the UMA group (84%; P < 0.001); the PA (42.6%; 20/47 patients) and IA (47.8%; 22/46 patients) groups did not differ significantly (P = 1.000). Both branches of the obturator nerve passed above the superior margin of the external obturator muscle (EOM), and the obturator canal was enhanced in 13 of 50 (26%) patients in the UMA group. The posterior branch of the obturator nerve passed between the superior and main fasciculi of the EOM in 37 of 50 patients (74%) in the UMA group; the obturator canal was enhanced in 29 of these 37 patients (78%).
conclusionLocal anesthetic spread into the obturator canal using the UMA was superior to that using the PA and IA. Both branches of the obturator nerve could be blocked using the UMA.
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