Arteriovenous cerebral blood flow correlation in moderate-to-severe traumatic brain injury: CT perfusion study

The relationship between arterial and venous blood flow in moderate-to-severe traumatic brain injury (TBI) is poorly understood. was to compare differences in perfusion computed tomography (PCT)-derived arterial and venous cerebral blood flow (CBF) in moderate-to-severe TBI as an indication of changes in cerebral venous outflow patterns referenced to arterial inflow. Moderate-to-severe TBI patients (women 53; men 74) underwent PCT and were stratified into 3 groups: I (moderate TBI), II (diffuse severe TBI without surgery), and III (severe TBI after the surgery). Arterial and venous CBF were measured by PCT in both the internal carotid arteries (CBFica) and the confluence of upper sagittal, transverse, and straight sinuses (CBFcs). In group I, CBFica on the left and right sides were significantly correlated with each other (p