Nerve Blocks at the Wrist for Carpal Tunnel Release Revisited: The Use of Sensory-Nerve and Motor-Nerve Stimulation Techniques

This study describes how infrequently an initial motor response is identified when a nerve stimulator is used on the median nerve at the wrist. A very high success rate of median and ulnar nerve block at the wrist is obtained by use of sensory or sensory-motor-nerve stimulation and less than 10 mL of anesthetic solution.