Method and device for pressure dividing monitoring and estimating arterial blood CO2 by using respiratory gas CO2

A technology of exhaled gas and arterial blood, applied in the field of clinical respiratory monitoring, to achieve the effect of important clinical application value

Inactive Publication Date: 2008-07-09
THE FIRST AFFILIATED HOSPITAL OF GUANGZHOU MEDICAL UNIV (GUANGZHOU RESPIRATORY CENT) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And create a simple and portable one that can better reflect the real PaCO 2 , especially the end-tidal carbon dioxide monitoring instr

Method used

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  • Method and device for pressure dividing monitoring and estimating arterial blood CO2 by using respiratory gas CO2
  • Method and device for pressure dividing monitoring and estimating arterial blood CO2 by using respiratory gas CO2
  • Method and device for pressure dividing monitoring and estimating arterial blood CO2 by using respiratory gas CO2

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Embodiment 1

[0037] Referring to Figure 1, the present invention uses exhaled CO 2 Partial pressure monitoring estimates arterial blood CO 2 The device of the method of partial pressure includes a capnography monitor 1 connected with a computer PC; the computer PC has a central processor A, a memory DISK and a data memory Z, and the capnography monitor 1 is connected with the data memory Z of the computer PC, and the data memory Z is connected to the central processor A of the computer PC. The memory DISK of the computer PC is equipped with data storage space B input by the capnograph 1, peak flow rate calculation software storage space E, peak flow rate storage space F, and instantaneous flow rate determination condition storage space G. Instantaneous flow velocity and the average flow velocity calculation software storage space H of the following four points, the average flow velocity value storage space obtained based on the instantaneous flow velocity judgment, the instantaneous slope calc...

Embodiment 2

[0039] Referring to Figure 2, another method of the present invention uses exhaled CO 2 Partial pressure monitoring estimates arterial blood CO 2 The device of the method of partial pressure includes a capnography monitor 1 connected with a computer PC; the computer PC has a central processor A, a memory DISK and a data memory Z, and the capnography monitor 1 is connected with the data memory Z of the computer PC, and the data memory Z is connected to the central processor A of the computer PC, and the memory DISK of the computer PC is provided with the PCO input by the capnograph 1 2 / Time data storage space N, instantaneous slope calculation formula storage space O, instantaneous slope value storage space P, instantaneous slope judgment condition storage space Q, instantaneous slope measurement point serial number storage space R, serial number storage space S, instantaneous slope judgment condition Storage space T, PCO corresponding to instantaneous slope 2 And the average calc...

Embodiment 3

[0041] Referring to Figure 3, the present invention uses exhaled gas CO 2 Partial pressure monitoring estimates arterial blood CO 2 The device of the method of partial pressure includes a capnography monitor 1 connected with a computer PC; the computer PC has a central processor A, a memory DISK and a data memory Z, and the capnography monitor 1 is connected with the data memory Z of the computer PC, and the data memory Z is connected to the central processor A of the computer PC. The memory DISK of the computer PC is equipped with data storage space B input by the capnograph 1, peak flow rate calculation software storage space E, peak flow rate storage space F, and instantaneous flow rate determination condition storage space G. Instantaneous flow velocity and the average flow velocity calculation software storage space H of the following four points, the average flow velocity value storage space obtained based on the instantaneous flow velocity judgment, the instantaneous slope ...

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Abstract

The invention discloses a method and a device using the expired gas partial pressure of CO2 to monitor and estimate the CO2 partial pressure of arterial blood, belonging to the clinical respiratory monitoring technology field. The technical points includes using a CO2 analyzing and monitoring instrument for the real-time acquisition on the expiratory flow, the time and CO2 partial pressure PaCO2 to be input into a computer; processing input data; when the instant flow is 22.25 plus or minus 0.08 percent or the instant slope of the flow speed/time curve is 0.13 plus or minus 0.19, (a) and the difference of the corresponding CO2 partial pressures is within about 5 percent, the average value of the corresponding CO2 partial pressure is basically the same with the arterial blood CO2 partial pressure; (b) the corresponding CO2 partial pressure difference is over about 5 percent, the mathematical model fitting is implemented on the CO2 partial pressure/time curve to estimate the corresponding arterial blood CO2 partial pressure. The invention can be applied to clinical wound-free monitoring COPD patients, especially the PaCO2 of severe COPD patients.

Description

Technical field [0001] The present invention relates to a clinical breathing monitoring technology, more specifically, it relates to a method of using exhaled CO 2 Partial pressure monitoring estimates arterial blood CO 2 The method of partial pressure, the present invention also relates to a device for realizing the above method. Background technique [0002] Chronic obstructive pulmonary disease (COPD) is a disease with the characteristics of airflow limitation. The airflow limitation is not completely reversible and develops progressively. It is related to the abnormal inflammatory response of the lungs to harmful gases or harmful particles. With the progress of COPD, peripheral airway obstruction, destruction of lung parenchyma, and abnormal pulmonary blood vessels reduce lung gas exchange capacity, resulting in hypoxemia, and hyperrespiratory acidemia may occur in the future. Blood gas analysis is very important for patients with acute and advanced COPD. However, the invasiv...

Claims

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Application Information

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IPC IPC(8): A61B5/145G06F17/00G01N33/48
Inventor 陈荣昌李德容郑则广罗群李寅环钟南山田联房魏栋
Owner THE FIRST AFFILIATED HOSPITAL OF GUANGZHOU MEDICAL UNIV (GUANGZHOU RESPIRATORY CENT)
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