Oxygen saturation of patients recovering from electroconvulsive therapy
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Updated: Oct 23, 2026

Pupillary Response as Assessment of Effective Seizure Induction by Electroconvulsive Therapy
Published on: April 11, 2019
1Department of Anaesthetics, Southampton General Hospital.
Abstract:
Oxygen saturation was measured by pulse oximetry in 33 psychiatric patients breathing air during recovery from 60 episodes of electroconvulsive therapy. Desaturation to less than 90% occurred in 17% of patients. Oxygen saturation values in recovery were significantly lower than pre-operative saturations (p = 0.0014 using ANOVA), with a significant difference (p = 0.001) for up to 5 min in recovery.
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Electroconvulsive Therapy

