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August 1, 2005Journal of Clinical Neurophysiology

QEEG Changes During Carotid Clamping in Carotid Endarterectomy: Spectral Edge Frequency Parameters and Relative Band Power Parameters

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Key result

Clamp minus preclamp QEEG parameters best distinguish carotid shunt need.

  • n=149

Why the study?

Which quantitative EEG parameters best distinguish the need for a shunt during carotid endarterectomy under isoflurane or propofol anesthesia?

Population

149 patients undergoing carotid endarterectomy under isoflurane (n=61) or propofol (n=88) anesthesia

Design

Cohort

Follow-up

intraoperative

Authors

DLD.M. LamanGWG.H. WienekeHDH. van Duijn

Discussion

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Overview

Anesthesia-specific QEEG thresholds may aid shunt decisions in CEA; hypothesis-generating and requires prospective validation before practice change.

Study Design

Type

Observational (n=149)

Structured PICO

Which quantitative EEG parameters best distinguish the need for a shunt during carotid endarterectomy under isoflurane or propofol anesthesia?

P
Population
149 patients undergoing carotid endarterectomy under isoflurane or propofol anesthesia, evaluated for EEG changes during carotid clamping.
E
Exposure
Quantitative EEG monitoring evaluating 16 derivations and 12 parameters (relative and absolute powers and spectral edge frequencies) during carotid clamping
O
Outcome
Distinction between patients who did and did not need a shunt during carotid clampingsurrogate

The optimal quantitative EEG parameters for detecting the need for a shunt during carotid endarterectomy depend on the type of anesthesia used (isoflurane vs. propofol).

Cite This Study

Laman et al. (2005) conducted an observational in Carotid endarterectomy (n=149). QEEG parameters (SEF and relative band power) vs. Shunt vs nonshunt groups was evaluated on Distinguishing between shunt and nonshunt groups. Clamp minus preclamp computation of QEEG parameters best distinguished shunt need, with SEF 90% best for isoflurane and delta band relative power best for propofol.

synapsesocial.com/papers/6aa4be38ac77d5296f2bc9adhttps://doi.org/10.1097/01.wnp.0000167931.83516.cf
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Also Consider

Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Prognostic Value of Computerized EEG Analysis during Carotid Endarterectomy1983 · 149 citations
  2. 2Current role of electroencephalography in cerebral ischemia.1993 · 78 citations
  3. 3Cerebral blood flow measurements and electroencephalograms during carotid endarterectomy1974 · 357 citations