Preoperative evaluation of the chronically ill surgical patient by tilt table and adrenal responses correlated with blood volumes.
D000302:Adrenal Cortex / Q000502:physiology*; D001810:Blood Volume; D002908:Chronic Disease; D010361:Patients; D013514:Surgical Procedures, Operative
ADRENAL CORTEX/physiology; BLOOD VOLUME; SURGERY, OPERATIVE/experimental