Balloon test occlusion of the internal carotid artery: change in stump pressure over 15 minutes and its correlation with xenon CT cerebral blood flow.

Abstract

Large overlaps among the groups prohibit the use of stump pressure changes as an accurate predictor of CBF or of stroke risk in an individual patient. However, these data suggest an autoregulatory mechanism in the cerebral circulation that evolves over a period of minutes in contrast to the traditional concept of cerebral autoregulation which is thought to occur in a matter of seconds.