Three-wavelength vein blood oxygen concentration measuring method

A technology of venous blood and oxygen concentration, applied in the field of biomedicine, can solve the problems of weak anti-interference ability and complex anti-interference in the measurement process, and achieve the effect of effective parameters, strong anti-interference ability and accurate measurement

Inactive Publication Date: 2021-05-28
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, the inventors of the present application have found through research that the anti-interference ability of the existing dual-wavelength measurement method is weak, and the measurement accuracy needs to be further improved
Theref

Method used

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  • Three-wavelength vein blood oxygen concentration measuring method
  • Three-wavelength vein blood oxygen concentration measuring method
  • Three-wavelength vein blood oxygen concentration measuring method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A method for three-wavelength venous blood oxygen concentration measurement, comprising the following steps:

[0055] S1: Prepare a three-wavelength venous blood oxygen concentration measuring device: the three-wavelength venous blood oxygen concentration measuring device is composed of a blood oxygen probe, a signal amplifier, an analog-to-digital converter, and a main controller;

[0056] S2: Blood sample signal collection and conversion: the blood oxygen probe collects and performs photoelectric conversion to convert the light intensity signal into a frequency signal. After the signal is amplified by the signal amplification circuit, it is converted by an analog-to-digital converter to convert the frequency signal into Digital signal;

[0057] S3: Signal processing: the analog-to-digital converter transmits the digital signal of the blood sample signal to the main controller, and the main controller obtains an electrical signal proportional to the light intensity after...

Embodiment 2

[0093] The difference between this embodiment and embodiment 1 is that the method measurement results provided by this embodiment are as follows: SpO 2 When the simulated value is 96%, and the PI simulated value is 3%, the measured values ​​of venous blood oxygen and PR are as follows (accuracy is ±1%):

[0094]

[0095]

[0096] In this embodiment, the measurement method has stronger anti-interference ability, accurate measurement, no time interval during the measurement period, and can provide real-time, continuous and effective parameters.

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Abstract

The invention discloses a three-wavelength vein blood oxygen concentration measuring method, a measuring device is composed of a blood oxygen signal, a blood oxygen probe, a signal amplifier, an analog-digital converter and a main controller, the blood oxygen probe collects a blood sample signal, carries out photoelectric conversion, converts a light intensity signal into a frequency signal, carries out signal amplification through a signal amplification circuit, performs ADC conversion, converts the frequency signal into a digital signal, transmits the digital signal to the main controller, the digital signal is processed by the main controller to obtain an electric signal in direct proportion to the light intensity, and the obtained electric signal is substituted into a three-wavelength calculation formula obtained by new derivation to obtain the corresponding venous blood oxygen concentration. According to the three-wavelength vein blood oxygen concentration measuring method, wavelength light sources on absorption points such as reduced hemoglobin and oxyhemoglobin serve as reference light sources, the three-wavelength vein blood oxygen concentration measuring method is obtained through derivation, the anti-interference capacity is higher, measurement is accurate, no time interval is generated in the measuring period, and real-time, continuous and effective parameters can be provided.

Description

technical field [0001] The invention belongs to the field of biomedicine, in particular to a method for measuring the oxygen concentration in human vein blood. Background technique [0002] With the development of society, people pay more and more attention to their own health. Medical experts have made full use of the characteristics of the times and applied various information technologies to the medical field. The combination of these technologies can more accurately and effectively find and treat intractable diseases that exist in people's bodies. Various life activities of the human body are inseparable from oxygen, and the consumption and demand of the human body for oxygen reflect the health of human tissues. Therefore, monitoring the oxygen demand (measured by oxygen saturation) of a patient or a person in need is an important task in the medical field. The concept of arterial oxygen saturation and venous oxygen saturation came into being. [0003] Methods for mea...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N21/3577G01N21/359
CPCG01N21/314G01N21/3577G01N21/359G01N2021/3144G01N2021/3148G01N2021/3155G01N2021/3181
Inventor 唐枋李润林
Owner CHONGQING UNIV
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