Why the study?
Does the rebreathing technique accurately estimate arterial CO2 tension compared to direct measurement in patients with heart or lung disease?
Population
60 consecutive patients with heart or lung disease, many with severe pulmonary emphysema with CO2 retention
Comparison
Estimation of arterial CO2 tension using a… vs Directly measured arterial CO2 tension
Design
Cross-sectional
Authors
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May support non-invasive PaCO2 estimation in heart/lung disease; leaves open prospective validation before routine use.
Does the rebreathing technique accurately estimate arterial CO2 tension compared to direct measurement in patients with heart or lung disease?
The rebreathing technique provides a reasonably accurate non-invasive estimation of arterial CO2 tension in patients with heart or lung disease.
Hackney et al. (1958) studied this question.
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