Middle cerebral O2 delivery during the modified Oxford maneuver increases with sodium nitroprusside and decreases during phenylephrine

The modified Oxford maneuver is the reference standard for assessing arterial baroreflex function. The maneuver comprises a systemic bolus injection of 100 $μ$g sodium nitroprusside (SNP) followed by 150 $μ$g phenylephrine (PE). On the one hand, this …