PMID: 2496203Jan 1, 1989Paper

The Doppler CO2 test to exclude patients not in need of extracranial/intracranial bypass surgery

Journal of Neurology, Neurosurgery, and Psychiatry
B Widder

Abstract

In patients with an internal carotid artery (ICA) occlusion who suffer from ipsilateral transient ischaemic attacks or minor stroke extra/intracranial (EC/IC) bypass surgery may be useful only where there is insufficient collateral supply. The transcranial Doppler CO2 test offers a simple method of investigating the residual autoregulatory capacity which gives quantitative information about the efficiency of the collaterals. In 155 patients with 162 ICA occlusions there was a significant correlation between a markedly decreased or exhausted autoregulatory capacity and a recent ipsilateral ischaemic event (p less than 0.001). The Doppler CO2 test may enable the exclusion of patients not in need of EC/IC bypass surgery. In the reported series this affected more than 80% of all ICA occlusions.

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Citations

Jan 1, 1997·Medicine and Law·R Hinchcliffe
Jul 3, 2007·Current Treatment Options in Cardiovascular Medicine·Nancy Futrell
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