[A new alarm device for air embolism during neurosurgery in the sitting position].
D000818:Animals; D001921:Brain / Q000601:surgery*; D003388:Cranial Fossa, Posterior; D004285:Dogs; D004301:Doppler Effect; D004618:Embolism, Air / Q000175:diagnosis*; D007432:Intraoperative Period; D008991:Monitoring, Physiologic / Q000295:instrumentation*; D011187:Posture