Sensitivity of transcranial Doppler for confirming brain death: a prospective study of 270 cases.

Abstract:

OBJECTIVE:The reported sensitivity of transcranial Doppler ultrasonography (TCD) for confirming brain death (BD) ranges from 91% to 100%. We assessed the frequency and causes of false-negative results in TCD examination in a series of patients with BD and in the literature. METHODS:We carried out a prospective TCD examination of consecutive patients with the clinical diagnosis of BD. RESULTS:In 204 (75.5%) of 270 patients, TCD showed a pattern compatible with BD. The causes of the false-negative results were persistent flow in the intracranial arteries in 47 (17.4%) patients and a lack of signal in 19 (7%). Absence of sympathomimetic drug use [odds ratio (OR) 5.4, 95% confidence interval (CI) 1.8-16.0, P = 0.003) and female gender (OR 3.7, 95% CI 1.1-12.5, P = 0.03) were associated with false-negative results. A review of 16 studies showed a sensitivity of 88% and a specificity of 98% of TCD for confirming BD. CONCLUSIONS:The sensitivity of TCD for confirming BD may be lower than previously reported, but is probably similar to that of other non-invasive methods. The specificity of TCD is close to 100%. Uniform criteria are needed for the routine use of TCD as a confirmatory test for BD.

journal_name

Acta Neurol Scand

authors

de Freitas GR,André C

doi

10.1111/j.1600-0404.2006.00645.x

subject

Has Abstract

pub_date

2006-06-01 00:00:00

pages

426-32

issue

6

eissn

0001-6314

issn

1600-0404

pii

ANE645

journal_volume

113

pub_type

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