초록 ▼

Apparatus for automatically analyzing a gas sample to determine the concentration of an absorbable gas therein, such as carbon dioxide in a patient\s out breath. In the preferred embodiment, the end tidal volume of the patient\s out breath is automatically sampled, drawn into a sample cylinder, circ

Apparatus for automatically analyzing a gas sample to determine the concentration of an absorbable gas therein, such as carbon dioxide in a patient\s out breath. In the preferred embodiment, the end tidal volume of the patient\s out breath is automatically sampled, drawn into a sample cylinder, circulated through an absorber, and the volumetric reduction effected by the absorption of the absorbable gas measured by a pressure indicator, all of which is cycled by the normal respiration cycle of the patient through an end of breath detector mechanism. The end of breath detector mechanism may also be used as a gas flow meter generally.

대표청구항 ▼

Gas analyzer comprising: (a) a volumetric gas sampling means comprising a gas receiving cylinder and piston; (b) sampling means actuator for reciprocally driving said sampling means piston; (c) means for triggering said actuator; (d) valve means for selectively connecting said sampling means to a so

Gas analyzer comprising: (a) a volumetric gas sampling means comprising a gas receiving cylinder and piston; (b) sampling means actuator for reciprocally driving said sampling means piston; (c) means for triggering said actuator; (d) valve means for selectively connecting said sampling means to a source of said sample gas, during the sample phase of operation of said analyzer, or to a closed recycle circuit including an absorber for a gas, the content of which in said sample gas is to be measured during the analyze phase of operation of said analyzer; and (e) means for comparing the volume of sample gas in said recycle circuit before and after passage of said gas through said recycle circuit and absorber.