Mask ventilation, hypocapnia, and seizure duration in electroconvulsive therapy

Christopher G. Choukalas, James Walter, David Glick, Michael F. O'Connor, Avery Tung, Stephen H. Dinwiddie, Mark E. Nunnally

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Study Objective: To compare the Mapleson D circuit and the bag-valve-mask device for mask ventilation of patients undergoing electroconvulsive therapy (ECT). Design: Cross-over study. Setting: Single-center academic medical center. Patients: 18 patients undergoing ECT for major depressive disorder. Interventions: Patients were randomized to undergo mask ventilation by the Mapleson D circuit or the bag-valve-mask device. Measurements: End-tidal CO 2, seizure duration, and airway pressure values were recorded. Main Results: End-tidal CO2 was significantly lower with the bag-valve-mask device. When compared with the bag-valve-mask device, ventilation with the Mapleson circuit resulted in rebreathing of CO2 in nearly all patients, shorter expiratory time, and lower pressure ramp slope. Conclusions: Hypocapnia was not associated with longer seizures, and the user-device interaction might affect device performance.

Original languageEnglish (US)
Pages (from-to)415-419
Number of pages5
JournalJournal of Clinical Anesthesia
Issue number6
StatePublished - Sep 1 2010


  • Electroconvulsive therapy
  • Equipment and supplies: bag-valve-mask ventilation device
  • Mapleson D circuit
  • Mask ventilation

ASJC Scopus subject areas

  • Anesthesiology and Pain Medicine


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