BERNARD P. WOLFF, M.D.
Interstitial emphysema of the lungs following injury or greatly increased intrapulmonary pressure has long been recognized clinically by the appearance of air in the subcutaneous tissues about the neck. The term surgical emphysema has been applied to this condition to distinguish it from vesicular emphysema produced by bronchial obstruction and subsequent dilatation of the pulmonary alveoli. The first description of interstitial emphysema occurring spontaneously, that is, without trauma or greatly increased intrapulmonary pressure, was recorded by Hamman1 in 1937. He reported six cases and described a new physical sign characteristic of the condition. He emphasized that spontaneous interstitial emphysema is
WOLFF BP. SPONTANEOUS INTERSTITIAL EMPHYSEMA OF THE LUNGS; REPORT OF AN ADDITIONAL CASE1. Ann Intern Med. ;13:1250–1252. doi: 10.7326/0003-4819-13-7-1250
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Published: Ann Intern Med. 1940;13(7):1250-1252.
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