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Bhavani Shankar Kodali MD

Capnogram recorded during general anesthesia for cesarean section

Capno Clips

 Bhavani Shankar Kodali MD

 pregnant.

 

 Capnogram recorded during general anesthesia for cesarean section.

The slope of the phase III is increased. This is a normal physiological variation. Airway obstruction can result in an increase in the phase III as well. Depending on the severity of airway obstruction, phase II can also be prolonged.

Occasionally, a phase IV can also occur in capnograms recorded during anesthesia in pregnant subjects.

 

Reference:

Bhavani-Shankar et al. Canadian Journal of Anaesthesia 1992;39:617-32.

Shankar KB et al. Arterial to end-tidal carbon dioxide difference during cesarean section anaesthesia. Anaesthesia 1986;41:698-702.

Shankar KB et al. Arterial to end-tidal carbon dioxide difference during  anaesthesia for tubal ligations. Anaesthesia 1987;42:482-6