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.
This sound is heard best over the left lateral position. It has been described as a series of precordial crackles that correlate with the heart beat and not the respirations.
Also heard together with spontaneous pneumothorax; small and not a total lung collapse, on the left side. Sounds like bubbles hitting the inside of the chest. Can be felt/seen.
Hamman's crunch is caused by pneumomediastinum or pneumopericardium, and is associated with tracheobronchial injury due to trauma, medical procedures (e.g., bronchoscopy) or proximal pulmonary bleb rupture. It is commonly seen in Boerhaave syndrome.
- The Pericardium - Google Book Search. Retrieved 2008-11-26.
- Hadjis T, Palisaitis D, Dontigny L, Allard M (March 1995). "Benign pneumopericardium and tamponade". Can J Cardiol. 11 (3): 232–4. PMID 7889442.
- "Hamman sign" at Dorland's Medical Dictionary
- synd/3001 at Who Named It?
- . Chu CP, Chen PP (April 2002). "Tracheobronchial injury secondary to blunt chest trauma: Diagnosis and management". Anaesth Intensive Care. 30 (2): 145–52. PMID 12002920.
|This medical sign article is a stub. You can help Wikipedia by expanding it.|