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Noninvasive brain blood oxygen parameter measuring method

A parameter measurement and blood oxygen technology, which is applied in the field of medical testing and can solve problems affecting the stability of blood oxygen parameter detection.

Active Publication Date: 2015-03-04
重庆名希医疗器械有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the near-infrared spectroscopy detection method, the processing of the optical signal directly affects the stability of blood oxygen parameter detection.

Method used

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  • Noninvasive brain blood oxygen parameter measuring method
  • Noninvasive brain blood oxygen parameter measuring method
  • Noninvasive brain blood oxygen parameter measuring method

Examples

Experimental program
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Effect test

Embodiment 1

[0041] The non-invasive method for measuring blood oxygen parameters in the brain in this embodiment is based on the absorption characteristics of human tissue to near-infrared light, and realizes the measurement of local blood oxygen parameters in brain tissue, including the following steps:

[0042] S1) Two near-infrared LED light-emitting diodes are placed on the forehead of the human body, one emits light with a dominant wavelength λ 1 is 650nm, another dominant wavelength λ 2 800nm; two photoreceiving tubes are arranged on the same side of the two LED light-emitting diodes, and the midpoint of the connection between the two photoelectric receiving tubes and the two LED light-emitting diodes is horizontally collinear, and one of the photoelectric receiving tubes is connected to the LED light-emitting diode The distance D1 of the midpoint is 15mmmm, and the distance D2 of the midpoint of the connection between another photoelectric receiving tube and the LED light-emitting ...

Embodiment 2

[0073] Different from Example 1, λ 1 800nm, λ 2 1000nm; D1 is 29mm, D2 is 40mm.

Embodiment 3

[0075] The difference from Example 1 is that λ1 is 710nm, and λ 2 920nm; D1 is 22mm, D2 is 35mm.

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Abstract

The invention discloses a noninvasive brain blood oxygen parameter measuring method. The method includes: arranging two near-infrared LEDs, with light-emitting wavelengths being lambda1 and lambda2 respectively, on the forehead of a human body, arranging two photoelectric receiving tubes different in distance on the same side of the LEDs, respectively driving the two LEDs to emit light at time t1 and t2 under drive of a controller, acquiring light intensity values after human tissue absorption and scattering through the photoelectric receiving tubes every time after light emission, subtracting the value of the far photoelectric receiving tube from the value of the photoelectric receiving tube near to the LEDs respectively corresponding to the lambda1 and the lambda2 so as to eliminate influence on measurement due to background noise, skin and skull, and subtracting difference at the t2 time from difference at t1 time, in other words, making difference of the light intensity values at different time points to obtain concentration variation. The blood oxygen parameters measured by the method are more stable and accurate.

Description

technical field [0001] The invention relates to the field of medical detection, in particular to a method for measuring non-invasive brain blood oxygen parameters. Background technique [0002] Hemoglobin is the main carrier of oxygen in tissues, and it consists of oxyhemoglobin (HbO2) and deoxygenated hemoglobin (Hb). The metabolic process of the human body is a biological oxidation process, and the oxygen needed in the metabolic process enters the human blood through the respiratory system, combines with the deoxygenated hemoglobin (Hb) in the red blood cells to form oxyhemoglobin (HbO2), and then transports it to the human body All parts of the tissue cells go. [0003] At present, near-infrared spectroscopy (NIRS) detection method has been widely used in medicine to detect the changes of oxygenated hemoglobin (HbO2) and deoxygenated hemoglobin (Hb). Near-infrared light has good penetrability to human tissues, and studies have shown that HbO2 and Hb are the main absorbe...

Claims

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Application Information

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IPC IPC(8): A61B5/1455
CPCA61B5/14552A61B5/14553A61B5/7203
Inventor 李卓东何文劼胡胜利赖波王中克闫晓东刘欢郑子隆吴西彭毅杨峻
Owner 重庆名希医疗器械有限公司
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