Pulmonary barotrauma during scuba diving is a life-threatening event. In a skin diver, who does not use compressed air, this complication is rare and its pathophysiology is not readily understood. We present a young, healthy skin diver who suffered pneumomediastinum and subcutaneous emphysema after a sequence of free dives to 5 m, and suggest a possible mechanism.

Kol, Weisz, Melamed, , , , , , (1993). Pulmonary barotrauma after a free dive–a possible mechanism.¬†Aviation, space, and environmental medicine, 1993 Mar;64(3 Pt 1):236-7.¬†https://www.ncbi.nlm.nih.gov/pubmed/8447807