Spread of Injectate Associated With Radial or Median Nerve-Type Motor Response During Infraclavicular Brachial-Plexus Block: An Ultrasound Evaluation

We have demonstrated that as compared with median-nerve-type motor response, injection performed after a radial-nerve-type motor response promoted reproducible and remarkable ultrasound spread characteristics associated with complete sensory block of the 3 cords at 30 minutes.