In this study, we investigated the blood flow velocity changes in orbital a
rteries by using Doppler sonography in eight patients with brain death. Pea
k-systolic and end-diastolic velocities and resistive indices of the ophtha
lmic and central retinal arteries were evaluated. We observed the absence o
r reversal of end-diastolic blood flow in these arteries. To our knowledge,
this finding has not been previously reported to be associated with brain
death.