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[Electroconvulsive therapy decreased bispectral index--a case report]

T Tanabe¹, T Sakai, W D Mi

¹Department of Anesthesiology, University of Hirosaki School of Medicine.

Masui. the Japanese Journal of Anesthesiology

|October 24, 1998

Summary

Electroconvulsive therapy (ECT) may lower Bispectral Index (BIS) levels during propofol anesthesia in schizophrenia patients. This study observed decreased BIS values following ECT administration in a single patient case.

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Area of Science:

Anesthesiology
Neuroscience
Psychiatry

Background:

Electroconvulsive therapy (ECT) is a psychiatric treatment.
Propofol is commonly used for anesthesia during ECT.
Monitoring brain activity with Bispectral Index (BIS) is crucial.

Observation:

A 28-year-old female patient with schizophrenia received five ECT sessions under propofol anesthesia.
Bispectral Index (BIS) was monitored during four of the five sessions.
BIS values were recorded before anesthesia, after loss of consciousness, immediately after ECT, and two minutes post-ECT.

Findings:

Pre-anesthesia BIS was 95.3 +/- 1.3.
After loss of consciousness, BIS decreased to 38.0 +/- 13.1.
Immediately after ECT, BIS was 45.3 +/- 12.7.

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Two minutes post-ECT, BIS further decreased to 27.3 +/- 11.6.

Implications:

ECT may lead to a reduction in BIS values during continuous propofol infusion.
These findings suggest a potential interaction between ECT and propofol affecting brain activity monitoring.
Further research is needed to confirm these observations in a larger patient cohort.