Rebreathing Method for Measurement of Mixed Venous Pco2

Rebreathing Method for Measurement of Mixed Venous

so the CO2 tension can be measured in a gas rather than in a liquid (Campbell and Howell, 1960a). The problem is to achieve this equilibrium before the prevention of its excretion causes the pressure of the CO2 in the blood to rise excessively. A rapid equilibrium will be achieved if a gas mixture is rebreathed which contains enough CO2 to enrich the alveolar gas to approximately the same tensi...

Improving the Reliability of the Rebreathing Method for Measuring Mixed Venous Pco2.

The neurotoxicity of ethoglucid given by arterial perfusion has been investigated in dogs in order to study the histological basis of the various effects noted in clinical practice. A direct toxic effect on nerve fibres of all types was found, and, in addition, damage to muscle and skin in the infused area was observed. A greater proportion of these effects appears to be reversible. The results...

Noninvasive measurement of mixed venous PCO2.

Applicability of Rebreathing Method for Determining Mixed Venous Co(2) in Cases of Chronic Pulmonary Disease.

The carbon dioxide tension of oxygenated mixed venous blood has long been used, in normal individuals and frequently in subjects with various forms of disease, in the determination of cardiac output according to the Fick principle. The method of rebreathing mixtures of CO2 and oxygen, for establishing equilibrium between the CO2 tensions of the lungs and the incoming venous blood, and at the sa...

An Evaluation O F Rebreathing Methods for Measuring Mixed Venous P C O ~ during Exercise

1. Measurements have been made of mixed venous Pco, (PV,co,) by two methods during exercise at 50 and 100 W in five adult male subjects. 2. The equilibration (plateau) method and the extrapolation (Defares) method were performed alternately, five times each, during the steady-state exercise. 3. The coefficient of variation of PT,co, by the extrapolation method was much higher than that of the p...