[Air embolism during neurosurgical operations in the sitting position. Efficacy of real-time two-dimensional echocardiography].
D004452:Echocardiography / Q000379:methods*; D004618:Embolism, Air / Q000175:diagnosis*; D006801:Humans; D007431:Intraoperative Complications / Q000175:diagnosis; D008991:Monitoring, Physiologic / Q000379:methods; D009493:Neurosurgery; D011187:Posture