SHOULDER & ELBOW
Faster interscalene nerve block onset with injection inside brachial plexus sheath
This report has been verified
by one or more authors of the
original publication.
J Ultrasound Med. 2016 Feb;35(2):279-85
60 patients undergoing elective shoulder surgery and receiving an interscalene nerve block were randomized to an injection of 0.5% ropivacaine either directly inside the brachial plexus sheath, or outside the brachial plexus sheath. The study was conducted in order to determine which administration method yielded a faster nerve block and to assess the side effects of each injection technique. It was found that injecting the local anesthetic into the brachial plexus sheath resulted in a faster nerve block onset; however, it also resulted in an increased incidence of transient paresthesia while positioning the needle, as compared to injecting outside the sheath. All other outcomes were comparable between groups.
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