The use of propofol for anaesthesia for electroconvulsive therapy

Comparison of propofol and methohexitone in anaesthesia for ECT: effect on seizure duration and outcome

The effect of the induction agents propofol and methohexitone on seizure duration and clinical outcome was assessed in a prospective, randomised, double blind study in 32 depressed patients receiving electroconvulsive therapy (ECT). Assessments comprised Hamilton rating scales pre-ECT, weekly during the course, and at one month follow-up. Patients showed a significant improvement in depression as measured by the Hamilton rating scale across the course of the ECT treatment. This improvement was not significantly different in the propofol and methohexitone groups. Nor was the amount of improvement related to either the total duration of seizure experienced by the patient during the ECT series or the use of tricyclic antidepressants by some patients.

[Use of propofol in 1350 anesthetized patients for electroconvulsive therapy]

Propofol was used for 1,350 sessions of electro-convulsive therapy (ECT). After 0.5 mg of intravenous atropine, patients received 1 to 1.5 mg.kg-1 bolus of propofol over a period of 20 seconds or less. This was convenient for loss of the eye-lash reflex. A bolus of 15 to 20 mg suxamethonium was given, in non allergic patients, to prevent trauma from the seizure. The patient was hyperventilated with pure oxygen through a facial mask. The electric shock was delivered bitemporally after a dental protection had been inserted. For each patient, the following data were noted: sex, use of tricyclic antidepressant drugs, atopy, amount of administered propofol and the effective intensity of the electric shock. The 99 patients were given 16.27 +/- 14 ECT sessions. Among them 26 took antidepressant drugs and 34 were atopic. There was no difference, except for weight, between the 25 men and 74 women. The mean dose of propofol was 1.37 +/- 0.3 mg.kg-1. The dose decreased with increasing age. There was no statistical relationship between the amount of propofol and intensity of the electric shock required to set off a seizure. The use of antidepressant drugs, and atopy did not influence the required amount of propofol. Speed of injection seemed to be the determining factor for narcosis with low doses of propofol. Hyperoxia and hypocapnia induced by hyperventilating with pure oxygen seemed to facilitate occurrence and duration of seizures. Although propofol has been said to reduce the length of seizures, there is controversy concerning the ECT efficacy criteria.(ABSTRACT TRUNCATED AT 250 WORDS)