Intelligent zero-calibration method and device for respiratory gas monitoring

Abstract

The invention provides a smart zero calibration method and a smart zero calibration device for monitoring breathing air. The smart zero calibration method comprises the following steps: A, timing step, namely beginning timing a baseline stage, wherein the baseline stage is the time interval of the wave trough stage of a CO2 concentration breathing wave; B, storage step, namely storing the timing result of the baseline stage; C, command judging step, namely judging whether a zero calibration command is monitored, if yes, executing step D, else executing step A; D, comparison step, judging whether the timing result of the baseline state falls in the range of a zero calibration threshold, if yes, executing step E, else executing step A; E, zero calibration step, carrying out zero calibration at the baseline state of the current CO2 concentration breathing wave, so as to obtain a zero-based reference value. The smart zero calibration method has the beneficial effect that zero calibration is rapidly completed; the key parameter values at which a user is concerned are not influenced and the influence of zero calibration on the real-time breathing wave is reduced to the greatest extent.

Description

technical field [0001] The invention relates to the field of respiratory gas monitoring, in particular to an intelligent zero calibration method and device for respiratory gas monitoring. Background technique [0002] Respiratory gas monitoring is mainly used to monitor physiological parameters related to the patient's respiratory vital signs, often involving respiratory rate, end-tidal CO 2 concentration, inhaled CO 2 concentration and shape. It mainly monitors the breathing-related physiological parameters of anesthetized patients during the operation or real-time monitoring of ICU patients, and gives medical staff prompts according to the test results, and makes corresponding adjustments in time. [0003] exhaled CO 2 Concentration measurement as an example, based on the Lambert-Beer law of spectral absorption, i.e. CO 2 The absorption peak of the gas in the infrared spectrum has an absorption effect on the corresponding wavelength infrared light, and the absorption i...

AI Technical Summary

Problems solved by technology

Obviously, this zero calibration operation will affect the normal CO 2 The measurement of the respiratory wave, because it is switched to the air channel, cannot perform real-time detection of the breathing situation at this time, and it is likely to miss the more critical respiratory waveform, which will affect the judgment of the medical staff

At the same time, it will also affect the calculation of the real-time measurement results of various parameters, and the accuracy of the end-expiration value, inhalation value, and respiration rate value will be affected.

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