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Canadian Journal of Anesthesia, Vol 19, 647-650, Copyright © 1972 by Canadian Anesthesiologists' Society

THe Effect of Posture on Gas Exchange following Cardiac Surgery

FRED I. RABOW M.D., C.M.1, P. DWANE M.D.1, and HILLARY DON F.R.C.P.(C)1

1 Department of Anaesthesia, Royal Victoria Hospital and Mccill University, Monteal, P.Q., Canada

Gas exchange and cardiac output was measured in twelve patients the day after cardiac surgery involving total cardio-pulmonary bypass. Measurements made with the trunk of the patient flexed at 35° to the horizontal were compared with those made in the horizontal position.

There was no significant difference in arterial Po2, alveolar-arterial oxygen gradient (AaDODO2) or cardiac output. Arterial PCOCO2 decreased slightly but significantly in the 35° head-up position.

We concluded that the 35° head-up position could be safely used to make patients subjectively more comfortable, but there was no evidence of any improvement in cardio respiratory parameters.

Note:

Resident, Department of Anaesthesia.

Associate Professor, Present address, Department of Anaesthesia, Peter Bent Brigham Hospital, Boston, Masschusetts 02115.






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Copyright © 1972 by the Canadian Anesthesiologists' Society.