Fig. 1. Pressor (phenylephrine) and depressor (nitroprusside) test sensitivities of healthy volunteers before (Awake), during (Anesthesia), and after (Recovery) sevoflurane anesthesia. The normothermia group subjects (n = 10) received whole-body forced-air heat, whereas the hypothermia group (n = 10) received no active warming during the entire course of the study. Values are mean ± SD. * P < 0.05 versus the normothermia group by Scheffé F test. †P < 0.05 versus the Awake values by Scheffé F test.