[Diagnosis of brain stem ischemia by transcranial Doppler ultrasonography].

Intracranial pressure (ICP) was elevated in cats by intrathecal infusions. Middle cerebral artery and basilar artery were studied using Transcranial Doppler (TCD) during the infusion followed by systemic arterial pressure increase (Cushing response). Cushing response was symptomatic for brain stem ischaemia. The earliest TCD changes concerned the basilar artery. The most informative data for the diagnosis were pulsatility index increase and diastolic velocity decrease.