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Mainstream type real-time monitoring method for concentration of plurality of types of breathing gas

A breathing gas, mainstream technology, applied in the field of biomedical engineering, can solve problems such as delay distortion, difficulty in miniaturization, poor measurement accuracy, etc., and achieve the effect of improving the signal-to-noise ratio

Inactive Publication Date: 2014-04-09
TIANJIN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problems of time-delay distortion, poor measurement accuracy and difficulty in miniaturization in the existing side-flow monitoring method for multiple respiratory gas concentrations, and provide a method for conveniently and accurately realizing real-time monitoring of multiple respiratory gas concentrations

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  • Mainstream type real-time monitoring method for concentration of plurality of types of breathing gas
  • Mainstream type real-time monitoring method for concentration of plurality of types of breathing gas

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Embodiment Construction

[0018] The gas concentration monitoring method of the present invention is proposed for mainstream monitoring of various respiratory gas concentrations, and the composition of the monitoring system applicable to the present invention is given below.

[0019] The mainstream multi-breathing gas concentration monitoring system consists of a host computer, a pipeline adapter and a monitoring module. The upper computer is a general-purpose computer or monitor. Pipeline adapters and monitoring modules such as figure 1 Insert the tubing adapter 1 into the monitoring module 2 as shown. The infrared light source 6 placed in the monitoring module 2 emits infrared light with a fixed period, and the infrared light is absorbed by the breathing gas when passing through the pipeline adapter 1, and finally detected by the four-channel pyroelectric sensor 3 placed at the other end. The output signal of the sensor 3 is filtered and amplified by the band-pass filter amplifier circuit 4 and sen...

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Abstract

The invention belongs to the field of biomedical engineering and relates to a mainstream type real-time monitoring method for the concentration of a plurality of types of breathing gas. The mainstream type real-time monitoring method comprises the following steps: controlling an infrared light source to switch on or off by using a pulse signal so as to output a modulation signal with a regular period by a four-channel pyroelectric sensor; collecting crest voltage or though voltage of each channel so as to obtain an alternative-current component of each channel by using a difference value of the crest voltage and the though voltage of each channel; adjusting measurement data of three measurement channels by using a correction equation, so as to obtain a numerical value of a carbon dioxide after adjustment, a numerical value of a nitrous oxide channel after adjustment and a numerical value of an ether atmosphere anesthetic gas channel after adjustment; respectively calculating the concentrations of different gases by using a coefficient and a three-order polynomial which are obtained through a calibration experiment. The mainstream type real-time monitoring method for the concentration of the plurality of types of breathing gas can be used for conveniently and accurately monitoring the concentrations of various breath gases in real time.

Description

Technical field: [0001] The invention belongs to the field of biomedical engineering, and relates to a real-time and synchronous monitoring method for the concentrations of carbon dioxide, nitrous oxide and ether-like anesthetic gases in mainstream human breathing gas. Background technique: [0002] During the clinical monitoring process, the real-time monitoring of the concentration of human respiratory carbon dioxide can accurately grasp the metabolism of the human body. In addition, during the operation process, the real-time monitoring of the concentration of anesthetic gases such as nitrous oxide and ether atmosphere anesthetic gases can provide important information and guidance for doctors to apply anesthesia . At present, due to the limitation of sensors, a small number of devices capable of real-time monitoring of the concentration of various respiratory gases are mainly carried out by pumping respiratory gases into side-flow monitoring modules, so there are delays ...

Claims

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Application Information

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IPC IPC(8): G01N21/3504
Inventor 杨嘉琛王海涛陈波波
Owner TIANJIN UNIV
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