A method for the assessment of O2-uptake and CO2-elimination from respiratory gases in mechanically ventilated patients is presented, the Beckman metabolic measurement cart. It was designed for exercise measurements. In patients under respirator treatment, there are problems resulting from the pressure sensitivity of the polarographic O2-electrode. Correct measurements of O2-uptake is possible if an inspired O2-concentration of 50 per cent is not exceeded.
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