Patent ID: 7805975
Filing Date: 2010-10-05
Classification: A61B,G01N

Abstract:
1. A method of calibrating a metabolic analyzer having a sample line adapted to receive inspiratory and expiratory respiratory gas therein, the sample line connected to a non-dispersive infrared carbon dioxide sensor having an IR emitter and an IR detector spaced from one another in the sample line, an oxygen sensor in series with said carbon dioxide sensor, means for drawing the respiratory gases through the carbon dioxide sensor and the oxygen sensor, a pressure sensor for sensing absolute pressure in the sample line and a flow regulator controlling the rate that the respiratory gases are drawn and a microprocessor based controller operatively coupled in controlling relation to the IR emitter, the IR detector, the oxygen sensor, the pressure sensor and the flow regulator comprising the steps of: (a) at the time of factory set-up: (b) in the field: