COLLECTION AND ANALYSIS OF VOLUME OF EXHALED GAS WITH COMPENSATION FOR FREQUENCY OF BREATHING PARAMETER

摘要

To provide devices and methods for sampling and analysis of gas from a person's breath for correlation to and diagnosis of an underlying physiologic condition.SOLUTION: Apparatuses may include a sample compartment, a breath speed analyzer, a gas analyzer, and a processor. The sample compartment includes an inlet that receives the breath. The breath speed analyzer determines a speed of a portion of the breath. The gas analyzer determines a gas concentration. The processor includes an algorithm that determines a degree of non-homogeneity of the sample based on the speed, and a corrected gas concentration based on the degree of non-homogeneity. In some variations, the gas correction is determined independently of patient cooperation. The apparatuses may be tuned based on the intended population's expected breathing pattern ranges such that the sample compartment is filled with a homogenous end-tidal gas sample regardless of an individual's breathing pattern. These apparatuses are useful, for example, for end-tidal CO analysis.SELECTED DRAWING: None