Phrenic nerve injury following stretch trauma: case reports.

Phrenic nerve injuries from stretch trauma are uncommon. The setting in which they occur is often associated with more severe or obscuring injuries. Electrodiagnostic studies are helpful in establishing the presence of a phrenic nerve injury and in monitoring recovery as demonstrated by the two case reports described here. Mechanisms of injury, the anatomic factors associated with phrenic nerve injury, and management are discussed.