Abrupt postural changes in patients undergoing air contrast studies.
D000293:Adolescent; D000328:Adult; D000768:Anesthesia, General; D000772:Anesthesia, Local; D001795:Blood Pressure Determination; D001835:Body Weight; D002200:Capillary Resistance; D014695:Cerebral Ventriculography / Q000295:instrumentation*; D006439:Hemodynamics; D006801:Humans; D008875:Middle Aged; D011187:Posture; D012119:Respiration