mediastinal emphysema

Symptoms of other consequences of lung overexpansion such as pneumothorax, subcutaneous or mediastinal emphysema may also be present.

Pneumomediastinum (from Greek pneuma - "air", also known as mediastinal emphysema) is a condition in which air is present in the mediastinum.

The clinical consequences if he got it wrong- multiple emboli, pneumothoraces, mediastinal emphysema, subcutaneous emphysema, all of them air bubbles where they shouldn't be- were nasty enough that he'd die screaming.

Hamman's murmur, also known as Laënnec-Hamman symptom, Laënnec-Müller-von Bergmann-Hamman symptom, or Hamman's crunch is a crunching sound heard over the precordium due to spontaneous mediastinal emphysema.

Hamman's sign (rarely, Hammond's sign or Hammond's crunch) is a crunching, rasping sound, synchronous with the heartbeat, heard over the precordium in spontaneous mediastinal emphysema produced by the heart beating against air-filled tissues.