Delayed quadriparesis after an interscalene brachial plexus block and general anesthesia: a differential diagnosis.

Interscalene brachial plexus block has been widely used for upper limb surgery. Different neurological complications related to this technique have been published. We report a case of quadriparesis of delayed onset, without loss of consciousness or cardiopulmonary compromise after an interscalene block and general anesthesia in a seated position.