Mainstream type synchronous monitoring device and method for multiple kinds of breathing gas concentrations and breathing gas pressure

Abstract

The invention discloses a mainstream type synchronous monitoring device and method for multiple kinds of breathing gas concentrations and breathing gas pressure. A light source is controlled to flicker, so that a four-channel infrared sensor outputs modulation signals with a fixed period. Measuring channel voltage and reference channel voltage of the four-channel infrared sensor and an output value of a differential pressure type gas pressure sensor are acquired. The breathing gas concentrations are monitored, and alternating components of all channels are acquired through wave crest and wave trough differential values of all the channels. Measuring data of three measuring channels are adjusted through a correction equation, and an adjusted numerical value of the carbon dioxide channel is obtained, an adjusted numerical value of the nitrous oxide channel and the adjusted numerical value of the ether atmosphere anesthetic gas channel are obtained. The concentrations of different gases are obtained through coefficients obtained through a calibration test and a three-order polynomial. A determined formula is fit according to the previous calibration test and a two-order polynomial through the output value of the gas pressure sensor, and current breathing gas pressure is determined. Real-time speed and breathing flow of breathing flow are obtained. The lung volume is obtained. The multiple kinds of breathing gas concentrations and breathing gas pressure can be synchronous monitored conveniently and fast.

Description

technical field [0001] The invention belongs to the field of biomedical engineering, and relates to a mainstream synchronous monitoring device and method for multiple breathing gas concentrations and breathing air pressure. Background technique [0002] The monitoring of human respiratory gas concentration and respiratory pressure is an important part of medical monitoring, which provides important information for clinical monitoring and disease diagnosis. At present, respiratory air pressure monitoring is mainly done in intensive care units with high-end ventilators, which are bulky, expensive and difficult to apply in portable monitoring equipment. Respiratory gas concentration monitoring can be divided into mainstream type and side flow type. The mainstream type monitors directly on the patient's breathing pipeline, avoiding the delay and distortion problems of the side flow type, but it is easily interfered by water vapor and excrement in the breath. . Respiratory gas ...

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Problems solved by technology

[0003] In order to solve the problems existing in the prior art, the present invention provides a mainstream multi-breathing gas concentration and breathing air pressure synchronous monitoring device and method, which overcomes the difficulty in the mainstream breathing gas concentration monitoring in the prior art, which is easily disturbed by the respiratory air flow, breathing air pressure, etc. Monitor issues with limited scope

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