Method and apparatus for measuring respiration, oxidation and similar interactions between a sample and a selected component of a fluid medium.

摘要

Atmospheric air is introduced into reference (20) and sample (21) chambers, whereupon alternating circulation of the gases in the two chambers through a carbon dioxide sensor (15), an oxygen sensor (16), a pressure indicator (17) and a pressure regulator (18) occurs before the gases are returned to their respective chambers (20, 21). The calculation of rate of production or consumption of carbon dioxide and oxygen by a tissue or other sample in the sample chamber (21) is controlled by a microprocessor (27, 28) which receives signals from the carbon dioxide (15) sensor oxygen (15) sensor and pressure indicator (17) and controls the circulation of the gases. Sensor drift is compensated for in the calculations through the use of multiple reference chamber readings and through volume determinations for the reference and sample chambers and the sensors.