Changes in the arterial to end-tidal PCO2 differences during coronary artery bypass grafting

Acta Anaesthesiologica Scandinavica
R Fletcher, F Veintemilla

Abstract

The arterial to end-tidal PCO2 difference, PaCO2-PE,CO2, was measured at four different stages during coronary artery bypass grafting in 43 patients: 1) before sternotomy; 2) after sternotomy, sternum retracted; 3) after bypass, sternum still retracted; 4) sternum closed. Mean PaCO2-PE,CO2 initially was 0.6 kPa and changed scarcely at all during the procedure. There were, however, some moderate individual changes in PaCO2-PE,CO2 during surgery, the range of changes compared to the initial value being from -1.4 to +1.3 kPa. The standard deviations for the changes from stage to stage were 0.3-0.4 kPa. PaCO2-PE,CO2 changed by more than 0.5 kPa on only 12 occasions in ten patients. The limitations of PaCO2-PE,CO2 as an index of the alveolar deadspace fraction and the efficiency of ventilation are discussed.

References

Apr 1, 1986·British Journal of Anaesthesia·C JonmarkerO Werner
May 1, 1986·Acta Anaesthesiologica Scandinavica·R FletcherB Jonson
Dec 1, 1983·Anesthesia and Analgesia·D B RaemerR A Gabel

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Citations

Jun 1, 1995·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·S K SharmaC J Cruise
Aug 1, 1996·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·R W Wahba, M J Tessler
Apr 1, 2006·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·Jana Hudcova, Roman Schumann
Oct 1, 1991·Canadian Journal of Anaesthesia = Journal Canadien D'anesthésie·V A Lazzell, F A Burrows
Apr 2, 1998·European Journal of Anaesthesiology·M BundS Piepenbrock
Oct 1, 1995·Academic Emergency Medicine : Official Journal of the Society for Academic Emergency Medicine·M C PlewaA Deuster
Jan 24, 2006·The Annals of Thoracic Surgery·Per WierupStig Steen
Feb 1, 1990·Journal of Cardiothoracic Anesthesia·R Fletcher

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