Objective To define cerebral blood flow dynamics during postoperative emergence from anesthesia, via blood oxygen saturation of jugular vein bulb (SjvO2) and transcranial Doppler (TCD). Methods 50 patients undergoing craniotomy and 50 patients undergoing abdominal surgery were grouped to craniotomy group (Group Ⅰ) and abdominal surgery group (Group Ⅱ) respectively. Jugular vein bulb was catheterized for all craniotomy patients. Mean velocity of middle cerebral artery (MCA Vm), mean arterial pressure (MAP), SjvO2 (only measured in Group Ⅰ) were measured before anesthesia, the moment of tracheal extubation, 30,60, 90, and 120 min after extubation in both groups. Results There was a significant increase in MCA Vm after extubation compared with the values before anesthesia in Group Ⅰ（P<0.05）, while MCA Vm did not change in Group Ⅱ. The increase in MCA Vm in Group Ⅰwas significant at least for 120 min after extubation（P<0.05）. There were significant differences in MCA Vm between two groups (P<0.05). SjvO2 increased significantly after extubation（P<0.05）,and maintained for 2 hr. There was correlation between MCA Vm and SjvO2 after extubation in Group Ⅰ（P<0.05）. However, there was no linear correlation between MCA Vm and MAP observed at one time. Conclusions Cerebral hyperemia occurs exclusively in patients who have craniotomy，its severity has no linear correlation with hypertention.
YANG Xiao-yu;ZHOU Shou-jing;YU Ying-fang.
Comparison of cerebral hyperemia during emergence from general anesthesia for craniotomy and abdominal surgery[J]. Fudan University Journal of Medical Sciences, 2008, 35(5): 687-0
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