Does Lidocaine Shorten Seizure Duration in Electroconvulsive Therapy?

Area of Science:

• Neuroscience
• Anesthesiology
• Psychiatry

Background:

• Electroconvulsive therapy (ECT) is a recognized short-term treatment for psychiatric disorders like schizophrenia and depression.
• Lidocaine is commonly administered with propofol during ECT to mitigate injection pain.
• Lidocaine's dose may influence seizure duration, a critical parameter in ECT efficacy.

Purpose of the Study:

• To investigate the impact of lidocaine dosage on seizure duration during electroconvulsive therapy.
• To analyze the relationship between lidocaine administration and seizure length in patients undergoing ECT.

Main Methods:

• A retrospective, naturalistic cohort study analyzed 4714 ECT sessions across 169 patients.
• Data included sessions with propofol alone or with lidocaine, with ictal quality assessed visually.
• Multivariate analyses controlled for demographic, ECT, and anesthetic variables to determine lidocaine's effect on seizure duration.

Main Results:

• A significant negative association was observed between lidocaine use and seizure duration.
• Lidocaine administration was linked to an average reduction of 3.21 seconds in seizure length.
• A dose-dependent negative correlation between lidocaine dose and seizure duration was identified.

Conclusions:

• Caution is advised regarding lidocaine dosing in ECT due to its effect on seizure length.
• Clinicians should carefully manage lidocaine administration to maintain optimal seizure duration.
• Further research is recommended to establish causal links and explore titration methods for charge calculation.