Table 2. Effects of Morphine and Fentanyl on Estimated Cerebral Blood Flow (1/AVD^O2) and Middle Cerebral Artery Mean Flow Velocity in the Entire Group and after Autoregulation Status

Data are mean ± SD. There were no differences within and between groups (morphine and fentanyl) or between patients with preserved or impaired autoregulation.

AVD^O2= arteriojugular oxygen content difference; V^mean= middle cerebral artery mean flow velocity.

* Corrected for changes in carbon dioxide partial pressure.