End-Tidal CO 2 for Prediction of Cardiac Output Following Weaning from Cardiopulmonary Bypass

This prospective study included 32 patients undergoing cardiopulmonary bypass (CPB) for elective coronary artery bypass grafting correlates the respiratory end-tidal CO 2 (ETCO 2 ) during partial separation from CPB with cardiac output (CO) following weaning from CPB. After induction of general anes...

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Veröffentlicht in:The Journal of extra-corporeal technology 2004-09, Vol.36 (3), p.255-257
Hauptverfasser: Baraka, Anis S., Aouad, Marie T., Jalbout, Maya I., Kaddoum, Roland N., Khatib, Mohammad F., Haroun-Bizri, Sania T.
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Sprache:eng
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Zusammenfassung:This prospective study included 32 patients undergoing cardiopulmonary bypass (CPB) for elective coronary artery bypass grafting correlates the respiratory end-tidal CO 2 (ETCO 2 ) during partial separation from CPB with cardiac output (CO) following weaning from CPB. After induction of general anesthesia, a pulmonary artery catheter was inserted for measurement of cardiac output by thermodilution. Patients were monitored using a 5-lead ECG, pulse oximeter, invasive blood pressure monitoring, rectal temperature probe, and end-tidal capnography. At the end of surgery, patients were weaned from CPB in a stepwise fashion. Respiratory ETCO 2 and in-line venous oximetry were continuously monitored during weaning. The ETCO 2 was recorded at quarter pump flow and after complete weaning from CPB. Following weaning from CPB, CO was measured by thermodilution. The CO values were correlated with the ETCO 2 during partial bypass and following weaning from bypass. Regression analysis of ETCO 2 at quarter-flow and post-bypass CO showed significant correlation (r = 0.57, p < .001). Also, regression analysis of ETCO 2 after complete weaning from bypass and post-bypass CO showed significant correlation (r = 0.6, p = .002). The correlation between ETCO 2 and CO showed that an ETCO 2 >30 mm Hg during partial CPB will always predict an adequate CO following weaning from CPB. An ETCO 2
ISSN:2969-8960
2969-8960
DOI:10.1051/ject/2004363255