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Expiration end CO2 monitoring device and method of noninvasive respirator

A monitoring device and end-expiratory technology, applied in the field of ventilators, can solve the problems of inability to achieve non-invasive monitoring, inability to perform blood testing efficiently and quickly, and low treatment efficiency, so as to eliminate influences, eliminate errors, and reduce errors. Effect

Active Publication Date: 2020-07-14
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Current monitoring of end-tidal CO 2 The most common method is basically to draw blood for testing, which cannot achieve non-invasive monitoring. At the same time, the delivery of blood for testing cannot be done efficiently and quickly, and the treatment efficiency is not high.

Method used

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  • Expiration end CO2 monitoring device and method of noninvasive respirator

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Embodiment 1

[0025] In the technical solutions disclosed in one or more embodiments, such as figure 1 As shown, the end-tidal CO of a non-invasive ventilator 2 The monitoring device includes a connecting hose, which is respectively connected to the breathing valve 1, the oxygen delivery tube 6 and the carbon dioxide exhalation tube 5 of the non-invasive ventilator, and the outlet end of the carbon dioxide exhalation tube 5 is connected to the first air chamber 3 and the monitoring device. Terminal, the first air chamber 3 is set CO 2 The detection device and moisture sensor are used to detect CO 2 Concentration and humidity data in the gas, the monitoring terminal detects CO based on the detected humidity data 2 The concentration is corrected to output the end-tidal CO 2 The waveform of the partial pressure as a function of time.

[0026] In this embodiment, by measuring the water vapor content in the patient's exhaled gas, the error caused by water vapor condensation can be eliminated...

Embodiment 2

[0050] In this embodiment, if figure 2 As shown, providing a non-invasive ventilator end-tidal CO 2 The monitoring method includes the following steps:

[0051] Step 1. Turn on the non-invasive ventilator to start oxygen delivery, and set the switch of the inhaled and exhaled gas pipeline according to the breathing frequency; specifically, it can be realized by the first ideal diode switch device 7 and the second ideal diode switch device 8 in the embodiment .

[0052] Step 2, collect the exhaled gas at the output end through the first air chamber 3, and obtain the detected humidity data and CO of the exhaled gas 2 Concentration data, according to the humidity data of exhaled gas to detect CO 2 The concentration is corrected to obtain the corrected end-tidal gas CO 2 concentration;

[0053] Step 3. According to the corrected end-tidal gas CO 2 The concentration of CO was obtained by gas source component spectral analysis method. 2 partial pressure parameter;

[0054] ...

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Abstract

The invention discloses an expiration end CO2 monitoring device and method of a noninvasive respirator. Due to arrangement of an isolation device, the situation that oxygen of an oxygen conveying section is directly fed into a respiration tube through a pipeline can be reduced, and errors of monitoring results, which are caused by the oxygen, can be reduced. Due to arrangement of a first gas chamber, a gas can be temporarily stored in the first gas chamber, and carbon dioxide in exhaled air can be effectively marked and detected; meanwhile, the content of vapor in the exhaled air of a patientcan be tested, so that errors caused by condensation of the vapor can be eliminated as much as possible in the monitoring process, the influence to experiment results by moisture can be eliminated asmuch as possible, and the expiration end CO2 concentration detection accuracy can be improved.

Description

technical field [0001] The present disclosure relates to the technical field related to the ventilator, in particular, relates to a ventilator end-tidal CO 2 Monitoring device and method. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] End-tidal CO is often sampled in clinical anesthesia and monitoring 2 Partial pressure is used to ensure the normal performance of pulmonary ventilation and ventilation function of patients during the perioperative period. end-tidal CO 2 Partial pressure can reflect pulmonary ventilation and pulmonary blood flow. When ventilator and anesthesia are used clinically, the ventilation volume is adjusted according to the partial pressure to keep the partial pressure close to the preoperative level. Therefore, end-tidal CO 2 After the data obtained from partial pressure monitoring are integrated, it can prov...

Claims

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Application Information

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IPC IPC(8): A61B5/083A61M16/00
CPCA61B5/0836A61M16/0003A61M2016/0042A61M2205/18A61M2205/3306A61B2560/0247
Inventor 李玮季心宇马德东韩毅马志祥孟祥伟
Owner SHANDONG UNIV
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