PMID: 8941692Oct 1, 1996Paper

Arterial-venous PCO2 gradient in early postoperative hours following myocardial revascularization

The Journal of Cardiovascular Surgery
F CavaliereR Schiavello

Abstract

To investigate the utility of the arterial-venous PCO2 gradient (P(a-v)CO2) as a marker of the increased risk of postoperative complications in the early postoperative hours following myocardial revascularization. Prospective study. The Postoperative Intensive Care Unit (ICU) of a University Hospital. Thirty patients (28 males and 2 females; aged 39-70) that consecutively underwent myocardial revascularization. None. Thirty minutes following arrival at the ICU the hemodynamic parameters were recorder; the arterial and mixed venous hemogasanalyses were obtained; the mixed venous blood hemoglobin saturation (SvO2) and the O2 consumption (VO2) were calculated; and plasma lactate was determined. The arterial and mixed venous hemogasanalyses were determined again 90 minutes after the admission to the ICU. P(a-v)CO2 at 30 minutes was 8.1+/-2.3 mmHg and was only slightly lower at 90 minutes (7.5+/-2.3 mmHg) so that any significant influence of patient transport to the ICU could be ruled out. P(a-v)CO2 did not significantly relate with cardiac index, mixed venous blood O2 saturation, and blood lactate. Twenty-one patients (70%) showed P(a-v)CO2 values higher than 7 mmHg at 30 minutes: in comparison with the others they were characteriz...Continue Reading

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