AbstractBilateral phrenic nerve paralysis is described following interscalene brachial plexus block and inadvertent epidural spread is discussed as being the probable cause.References1. Winnie A. P. (1970): “Interscalene Brachial Plexus Block”, Anesth. Analg., 49, 455.2. Cobcroft M. D. (1976): “Bilateral spread of Analgesia and Interscalene Brachial Plexus Block”, Anaesth. Intens. Care, 4, 73.3. Ward M. E. (1974): “The Interscalene approach to the Brachial Plexus”, Anaesthesia, 29, 147.
