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Stimulus dose titration for electroconvulsive therapy.

K F Chung1, S J Wong

  • 1Department of Psychiatry, University of Hong Kong and Department of Anaesthesiology, Queen Mary Hospital, Hong Kong SAR, China. kfchung@hkucc.hku.hk

Psychiatry and Clinical Neurosciences
|April 4, 2001
PubMed
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Stimulus dose titration for electroconvulsive therapy (ECT) is a practical method for accurately determining seizure thresholds. This study found dose titration feasible in most patients, unlike the less accurate

Area of Science:

  • Neuroscience
  • Psychiatry
  • Medical Technology

Background:

  • Stimulus dose titration is a method to accurately determine electroconvulsive therapy (ECT) seizure thresholds.
  • This technique has not been commonly practiced despite its potential for accurate measurement.
  • Accurate seizure threshold determination is crucial for optimizing ECT efficacy and safety.

Purpose of the Study:

  • To describe the early experience of performing stimulus dose titration in Chinese patients undergoing ECT.
  • To compare seizure thresholds measured by dose titration with those predicted by the formula-based 'half-age' method.
  • To evaluate the feasibility and safety of stimulus dose titration in a clinical setting.

Main Methods:

  • Stimulus dose titration was performed in 22 Chinese patients to determine individual seizure thresholds.

Related Experiment Videos

  • Seizure thresholds were measured in millicoulombs (mC) or joules (J) based on the stimulation required to induce a seizure.
  • Comparison was made between titrated thresholds and predicted thresholds using the 'half-age' formula.

    • Main Results:

    • Seizure thresholds measured by dose titration varied significantly, with an average of 105.5 mC (16.7 J).
    • A majority of patients (27% after one, 37% after two stimulations) achieved seizure induction with low stimulation doses.
    • The 'half-age' method overestimated seizure thresholds by an average of 44%, and by over 100% in 23% of patients.
    • No significant adverse events were reported during the dose titration procedures.

    Conclusions:

    • Stimulus dose titration is a feasible and safe procedure for the majority of patients receiving ECT.
    • The 'half-age' prediction method is significantly less accurate than dose titration for determining seizure thresholds.
    • Implementing dose titration can lead to more precise seizure threshold determination, potentially improving ECT treatment.