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Related Experiment Videos

Etomidate anesthesia increases seizure duration during ECT. A retrospective study

P T Trzepacz1, F C Weniger, J Greenhouse

  • 1University of Pittsburgh, School of Medicine, PA.

General Hospital Psychiatry
|March 1, 1993
PubMed
Summary

Etomidate anesthesia, compared to thiopental, significantly prolonged electroconvulsive therapy (ECT) seizure durations in depressed inpatients. This finding suggests etomidate may enhance ECT effectiveness by increasing seizure times.

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Area of Science:

  • Neuroscience
  • Psychiatry

Background:

  • Electroconvulsive therapy (ECT) is a treatment for severe depression.
  • Anesthetic agents used during ECT can influence seizure duration.
  • Etomidate, a nonbarbiturate anesthetic, has shown potential to enhance seizure activity.

Purpose of the Study:

  • To compare the effects of etomidate and thiopental anesthesia on electroconvulsive therapy (ECT) seizure duration.
  • To investigate whether etomidate enhances seizure duration in ECT sessions for psychiatric inpatients.

Main Methods:

  • Retrospective chart review of 28 consecutive depressed psychiatric inpatients who received ECT.
  • Each patient served as their own control, receiving both etomidate and thiopental anesthesia during different ECT sessions.
  • Comparison of mean seizure durations between etomidate and thiopental anesthesia sessions.

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Main Results:

  • Mean seizure durations were significantly longer (p < 0.001) during etomidate anesthesia sessions compared to thiopental anesthesia sessions.
  • Etomidate anesthesia enhanced seizure duration in the studied inpatient population.
  • The mean proportion of etomidate sessions per patient was 54%.

Conclusions:

  • Etomidate anesthesia, in contrast to some prior reports, enhanced seizure duration during electroconvulsive therapy (ECT) in this sample of depressed inpatients.
  • Longer seizure durations are controversially advocated to improve ECT effectiveness.
  • Clinical efficacy of anesthetic agents in depression relief could not be assessed due to the study's retrospective nature.