Duration of Sciatic Nerve Block After Injection of Local Anesthetic In or Around the Nerve

Summary

This study was designed to assess whether the injection of local anesthetic into the nerve (intraneural), as opposed to around it (perineural), leads to longer anesthesia and analgesia of the leg. Some reports of accidental intraneural injection mention an extremely long duration. When different drugs and doses were evaluated in a clinical trial of intraneural injection, a longer-than-expected duration was reported. The investigators will compare the two types of injection using the same drug, so as to determine if there is an actual difference in duration.

Timeline

Start

2012-10

Primary completion

2013-07

Completion

2013-10

Publications

• Background Benhamou D, Blonski E, Levy P, Plessis E, Chalhoub V. Ultra-long duration of a peripheral nerve block: a possible consequence of intraneural (subepineural) local anaesthetic injection. Ann Fr Anesth Reanim. 2010 Jul-Aug;29(7-8):589-91. doi: 10.1016/j.annfar.2010.05.032. Epub 2010 Jul 13.
• Background Nader A, Kendall MC, De Oliveira GS Jr, Puri L, Tureanu L, Brodskaia A, Asher Y, Parimi V, McCarthy RJ. A dose-ranging study of 0.5% bupivacaine or ropivacaine on the success and duration of the ultrasound-guided, nerve-stimulator-assisted sciatic nerve block: a double-blind, randomized clinical trial. Reg Anesth Pain Med. 2013 Nov-Dec;38(6):492-502. doi: 10.1097/AAP.0b013e3182a4bddf.

Drugs

Indications

No indication recorded.