Key result
Ultrasound-guided interfascial obturator nerve block achieves 100% success in blocking both nerve branches.
Why the study?
A simple and successful proximal ultrasound-guided obturator nerve block technique using interfascial local anesthetic injection was described and evaluated.
Observational
Ultrasound-guided obturator nerve block using interfascial local anesthetic injection between the pectineus and obturator externus muscles is a rapid and highly successful technique.
Supports technical feasibility of interfascial obturator block; hypothesis-generating and leaves open clinical efficacy and safety in larger trials.
In Brief BACKGROUND: In this report, I describe and evaluate a proximal ultrasound (US)-guided obturator nerve block technique using an interfascial local anesthetic (LA) injection deep to the pectineus muscle. METHODS: The pectineus muscle was identified and followed, while the US probe was tilted cranially until the superior pubic ramus was visualized. In this plane, LA was injected interfascially between the pectineus and obturator externus. RESULTS: The median time required to identify the injection site was 4 seconds (95% confidence interval, 3–5 seconds). The median motor block onset was 4 minutes (95% confidence interval, 3–5 minutes). Both obturator nerve branches were blocked successfully in all patients (100%). CONCLUSION: The US-guided obturator nerve block using interfascial LA injection inferior to the superior pubic ramus, between the pectineus and obturator externus muscles, was shown to be a simple and successful technique. Published ahead of print October 24, 2011
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Wada et al. (2011) conducted an observational in Patients requiring obturator nerve block. Ultrasound-guided obturator nerve block was evaluated on Successful block of both obturator nerve branches. Ultrasound-guided obturator nerve block using interfascial local anesthetic injection successfully blocked both obturator nerve branches in 100% of patients.
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