Systems and methods for concomitant co2 sampling and o2 delivery

Abstract

A CO2 monitoring system (100) provides oxygen (O2) (120, 230) to a subject's mask (140) with known characteristics. The CO2 monitoring system (100) receives, from the mask (140), gas samples (146) including exhaled CO2 (144) diluted by O2 (120, 230). The CO2 monitoring system (100) uses an adaptive noise canceller (166, 400) to cancel the diluting O2 (120, 230) by using the known characteristics of the O2 (120, 230) provided to the mask (140), the result of which process is restoration of the original concentration level of the CO2 (144) as exhaled by the subject into the mask (140).

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Application No. 62 / 461,121, filed February 20, 2017, the contents of which are hereby incorporated by reference in their entirety for all purposes. technical field [0003] The present disclosure generally relates to methods for measuring carbon dioxide (CO2) exhaled by a subject. 2 ) sampling capnography system, and more specifically relates to the realization of exhaled CO 2 Method and system for making reliable measurements despite diluting exhaled CO while simultaneously providing oxygen to the subject 2 . Background technique [0004] This section is intended to introduce the reader to various aspects of art, which may be related to various aspects of the inventive techniques that are described and / or claimed below. This discussion is considered helpful in providing the reader with background information to facilitate a better understanding of various asp...

AI Technical Summary

Problems solved by technology

Conventional hoods that contain two ports have the disadvantage of

One disadvantage is that sampling the CO 2 Oxygen dilution that is continuously delivered to the subject

Dilute CO by oxygen (or by any other gas for that matter) 2 Reduced CO 2 The concentration level (partial pressure) of the sample, resulting in CO 2 Measurements below capnographic standards and resulting in CO 2 Concentration measurements are inaccurate or incorrect and may lead attending medical personnel to draw erroneous conclusions about the subject's true breathing

As a result, CO 2 Sampling ports are often located in the mask, adjacent to the mouth / nasal opening, making it uncomfortable for the patient to wear the mask

[0008] Although for CO 2 Sampling and delivering oxygen are beneficial, but there is a need to use both functions at the same time (e.g., in CO 2 Dilution) related disadvantages

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