Key result
Peak expired PCO2 correlated significantly with arterial PCO2 during anesthesia (p<0.001), with mean arterial PCO2 exceeding peak expired PCO2 by 1.7 torr overall and 3.3 torr in lung disease.
Why the study?
Does peak expired PCO2 accurately reflect arterial PCO2 during anesthesia, and what factors influence their difference?
Population
Patients undergoing anesthesia
Design
Cross-sectional
Authors
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May support noninvasive capnography in anesthesia; leaves open adjustments needed with lung disease.
Observational
Does peak expired PCO2 accurately reflect arterial PCO2 during anesthesia, and what factors influence their difference?
Mean Difference: 1.7
p-value: p=<0.001
Peak expired PCO2 correlates significantly with arterial PCO2 during anesthesia, though the difference is greater in patients with lung disease.
Whitesell et al. (1981) conducted an observational in Patients undergoing anesthesia. Peak expired PCO2 measurement vs. Arterial PCO2 measurement was evaluated on Difference between temperature-corrected arterial and peak expired PCO2 (MD 1.7 torr, p=<0.001). Peak expired PCO2 correlated significantly with arterial PCO2 during anesthesia (p<0.001), with mean arterial PCO2 exceeding peak expired PCO2 by 1.7 torr overall and 3.3 torr in lung disease.
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