The delay in the diagnosis of brain death represents a cause of deficiency of organs for transplant. In this prospective study we evaluate the role of Doppler sonography, to investigate typical velocimetric profiles of brain death, and to evaluate the delay between finding the typical profiles and diagnosis expressed according to law. In this ongoing study, we evaluated 32 patients affected fro...

BACKGROUND AND PURPOSE Retrospective studies have found a close correlation between an impaired cerebrovascular reserve capacity and the incidence of hemodynamic stroke. The present study evaluates this relation prospectively. METHODS We measured the CO2 reactivity in 85 patients with internal carotid artery occlusions by transcranial Doppler sonography (Doppler CO2 test). All patients were p...

CSF pressure (intracranial pressure, in one patient lumbar pressure) was monitored continuously for one night in 23 patients with suspected symptomatic normal pressure hydrocephalus (NPH) to identify patients who might benefit from subsequent shunt surgery. In 20 patients middle cerebral artery (MCA) blood flow velocity by means of transcranial Doppler sonography (TCD) and CSF pressure were rec...

Intra-arterial Doppler sonography may complement arteriography by providing immediate physiological evidence of hemodynamic adequacy and by obviating unnecessary angioplastic dilation. We used a Doppler-tipped guidewire in 16 patients and obtained velocity measurements at the site of stenosis immediately before and after carotid artery stenting (CAS) in 10 patients. Intra-arterial Doppler sonog...