Hamman's crunch of pneumomediastinum is an unusual, adventitious sound heard on auscultation of the chest.
The consultant diagnosed the problem as Hamman's crunch of pneumomediastinum.
Our patient presented with a classic Hamman's crunch. The only difference between him and the patients described by Dr Hamman was the obvious increase in the sound on expiration.
Baumann and Sahn performed thoracic computed tomography on a patient with Hamman's crunch and failed to demonstrate pneumomediastinum.
Nine of these patients presented with Hamman's crunch, 11 had subcutaneous emphysema, 2 had pneumothorax, 13 admitted to illicit inhalational drug use, and 12 described a concomitant history of a "Valsalva type maneuver." The Valsalva maneuver can cause alveolar injury with subsequent interstitial emphysema, which dissects through tissue planes along the vascular tree to the hilum and subsequently penetrates the mediastinum.