title: Pneumothorax and systemic air embolism during positive-pressure ventilation.
mesh_terms: D017548:Echocardiography, Transesophageal; D004618:Embolism, Air / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011030:Pneumothorax / Q000209:etiology*; D011175:Positive-Pressure Respiration / Q000009:adverse effects*