A detection method of fundus blood flow oxygen saturation based on area array LED

A detection method and saturation technology, applied in the field of medical devices, can solve the problems of low detection accuracy, trouble, and inability to carry out continuous monitoring, and achieve the effect of high precision

Inactive Publication Date: 2018-05-11
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the measurement of blood oxygen saturation is mainly by electrochemical method. This method first collects blood from the human body (taking arterial blood) and then uses a blood gas analyzer to perform electrochemical analysis on the blood, directly measures the arterial partial pressure of oxygen (PaO2), and calculates Arterial blood oxygen saturation (SpO2); however, this method requires arterial puncture or intubation, which is cumbersome and cannot be continuously monitored. Measured using electrochemical methods
In addition, there is a monitoring method of pulse oximetry, which is susceptible to light interference, such as sunlight and operating room lights. If the light enters the detector during measurement, it will affect the intensity of the transmitted light obtained. This will ultimately affect the accuracy of the blood oxygen saturation parameters, and only when the value of the pulse oximeter is greater than 83%, can the error of 3% be achieved
[0004] Therefore, the existing methods for detecting blood oxygen saturation have the problem of low detection accuracy and need to be improved.

Method used

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  • A detection method of fundus blood flow oxygen saturation based on area array LED
  • A detection method of fundus blood flow oxygen saturation based on area array LED
  • A detection method of fundus blood flow oxygen saturation based on area array LED

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Embodiment

[0038] In this embodiment, a method for detecting blood oxygen saturation of fundus blood flow based on an area array LED includes the following steps:

[0039] S1. Set the acquisition speed and exposure time of the CCD color camera 1, so that when the red blood cells enter and exit the imaging range of the pixel unit, the local concentration changes cause the dynamic speckle interference intensity to change; the eye 6 is directly connected to the objective lens 5;

[0040] S2. Synchronize trigger source 8 with frequency f 0 Send n synchronization signals to the area array LED light source 7 and the CCD color camera 1, and n trigger the area array LED light source 7 at the same time to emit a wavelength of λ 1 And λ 2 The light reaches the beam splitter 4, the beam splitter 4 reflects the light to the eye objective lens 5 and reaches the fundus. The light reflected from the fundus enters the eye objective lens 5 again and enters the imaging objective lens 3 through the beam splitter ...

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Abstract

The invention relates to a device and method for detecting the eye-ground-blood-flow blood-oxygen saturation degree based on an area array LED. The device comprises a synchronous triggering source, a data processing system, an area array LED light source, a beam splitter mirror, an eye connecting objective lens, an imaging objective lens, a CCD color camera and a Bayer filter installed on the CCD color camera. The area array LED light source is alternately composed of LED lamps with the two wave lengths in series; the synchronous triggering source is used for emitting synchronous signals to the area array LED light source and the CCD color camera; when the synchronous signals are emitted, the area array LED light source emits light with the two wave lengths to the beam splitter mirror at the same time, the light is reflected to the eye connecting objective lens through the beam splitter mirror and reaches the eye ground rightly opposite to the eye connecting objective lens, the light is reflected from the eye ground to enter the eye connecting objective lens again and enters the imaging objective lens through the beam splitter mirror, and the CCD color camera collects speckle images formed by the light with the two wave lengths of the imaging lens, and transmits the speckle images to the data processing system for processing the speckle images to obtain the blood-oxygen saturation degree. The device is free of harm to the human body, and the detection accuracy of the blood-oxygen saturation degree is high.

Description

Technical field [0001] The present invention relates to the technical field of medical devices, and more specifically, to a method for detecting blood oxygen saturation of fundus blood flow based on an area array LED. Background technique [0002] Blood oxygen saturation refers to the percentage of hemoglobin bound by oxygen, that is, the percentage of hemoglobin's oxygen content to oxygen capacity. It is an important parameter of respiratory and circulatory functions and reflects the body's blood oxygen balance. Some diseases can cause hypoxia in organs or tissues of the human body, leading to abnormal metabolism of tissue cells, imbalance in internal environment, and serious threats to human life. Monitoring the blood oxygen saturation of the patient will help solve this problem. The fundus retina is a part of the systemic microcirculation. It needs oxygen supply to maintain its normal metabolism, and it is more sensitive to changes in blood oxygen, which facilitates monitorin...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): A61B3/12A61B3/14A61B5/1455
CPCA61B3/1241A61B3/14A61B5/14555A61B5/72A61B5/725A61B5/7257A61B2560/06
Inventor王茗祎曾亚光韩定安缪耀军
OwnerFOSHAN UNIVERSITY