title: Cardiorespiratory effects of the sitting position in neurosurgery.
abstract: The cardiorespiratory effects of raising patients from the supine to the sitting position for neurosurgery were investigated. The change caused marked decreases in cardiac index, stroke volume, PaO2 and Qs/Qt, with a significant increase in (PAO2-PaO2) and total peripheral resistance. It is concluded that patients who maintain normotension in the sitting position do not necessarily have an adequate circulatory status.
mesh_terms: D001794:Blood Pressure; D002302:Cardiac Output; D002496:Central Venous Pressure; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008875:Middle Aged; D019635:Neurosurgical Procedures; D010100:Oxygen / Q000097:blood; D011187:Posture; D013318:Stroke Volume
chemical_list: D010100:Oxygen