title: Anaesthesia and the Valsalva manoeuvre. A test of circulatory responses in neurosurgical patients including those in the sitting position.
abstract: The four phases of the Valsalva manoeuvre were studied before and after anaesthesia had been induced with a technique of either spontaneous breathing or controlled ventilation of the lungs. The Valsalva manoeuvre was found to be an unreliable predictor of a patient's ability to tolerate the upright or sitting position for neurosurgical procedures. However, a false negative response is more likely to occur than a false positive response.
mesh_terms: D000328:Adult; D000368:Aged; D000768:Anesthesia, General; D001794:Blood Pressure; D005260:Female; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008875:Middle Aged; D019635:Neurosurgical Procedures; D011187:Posture; D011300:Preoperative Care; D012018:Reflex / Q000502:physiology; D014636:Valsalva Maneuver