Pneumomediastinum, Pneumothorax and Subcutaneous Emphysema Following the Measurement of Maximal Expiratory Pressure in a Normal Subject

Mediastinal and subcutaneous emphysema have been reported as a consequence of deliberate manipulations of the breathing pattern producing a Valsalva-like maneuver in healthy subjects. We present a case of pneumomediastinum, pneumothorax and subcutaneous emphysema occurring in a normal volunteer after repeated measurements of the PEmax.