Fig. 3From: Hypoxic respiratory failure due to phrenic nerve palsy from an interscalene brachial plexus block and previously asymptomatic pulmonary embolisma The subject’s diaphragm is shown moving over time with the arrow indicating the beginning of expiration or elevation of the diaphragm. b The subject’s diaphragm does not move and the M-mode tracing is uniform over time indicating no movementBack to article page