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LED-based noninvasive blood oxygen saturation tester

A technology of saturation and detectors, applied in the field of non-invasive blood oxygen saturation detectors, can solve problems such as inability to provide blood oxygen saturation data, patient pain or even infection, time-consuming, etc., to achieve continuous real-time detection, safe and reliable results, and easy to use flexible effects

Inactive Publication Date: 2013-01-02
CHINA JILIANG UNIV
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

Existing invasive detection methods have the disadvantage of time-consuming, easy to cause pain and even infection to patients, and cannot provide continuous real-time blood oxygen saturation data

Method used

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  • LED-based noninvasive blood oxygen saturation tester
  • LED-based noninvasive blood oxygen saturation tester
  • LED-based noninvasive blood oxygen saturation tester

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] This embodiment takes a finger cuff type blood oxygen probe as an example. figure 1 It is a partial block diagram of the hardware design of the present invention. The core circuit is the connection circuit of the finger detection device, including a finger cuff blood oxygen probe. image 3 It is a schematic diagram of a finger cuff blood oxygen probe, including a light source device and a photoelectric receiving device. The light source device is fixed on the upper wall of the probe. It is two light-emitting diodes placed side by side, which can emit red light and infrared light. The LED drive circuit provides a stable and suitable light-emitting power supply current. In this embodiment, two light emitting diodes respectively emit 660NM red light and 940NM infrared light. The lower wall of the probe is a PIN photodiode, which can convert the r...

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Abstract

The invention mainly relates to an LED-based noninvasive blood oxygen saturation tester. A blood oxygen probe is arranged on a portion to be measured, after red light and infrared light are emitted from a light emitting source and transmit through a human body, a received light signal is converted into a micro-current signal by a photoelectric detector, the micro-current signal is acquired and then converted into a voltage signal, and then the voltage signal is amplified and filtered. The amplified voltage signal is a pulse signal, and related information of blood oxygen saturation is carried by waveform of the pulse signal. The amplified voltage signal is acquired by a data acquisition card and sent into a PC (personal computer) to be subjected to an algorithmic process. Due to the fact that reduced hemoglobin and oxyhemoglobin in blood have special absorption spectrum in red light and infrared light zones, blood components in tissues can be researched, and information of the blood oxygen saturation can be detected. The LED-based noninvasive blood oxygen saturation tester can measure human internal blood oxygen saturation continuously in real time, cannot hurt the human body, and has the advantages of simple structure, flexibility in use, safety and reliable results.

Description

technical field [0001] The invention relates to an LED-based non-invasive blood oxygen saturation detector, which is especially suitable for continuous and real-time detection of blood oxygen saturation in clinical monitoring in the medical field. Background technique [0002] Currently, there are two methods for detecting blood oxygen saturation: invasive measurement and noninvasive measurement. Existing invasive detection methods have the disadvantages of time-consuming, easy to cause pain and even infection to patients, and cannot provide continuous real-time blood oxygen saturation data. Based on the Lambert-Beer law, the invention utilizes the unique absorption spectra of reduced hemoglobin and oxygenated hemoglobin in red and infrared light regions to study blood components in tissues. The invention can realize the continuous and real-time measurement of blood oxygen saturation in the human body without causing loss to the human body, has the advantages of simple stru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/1455
Inventor 王乐梁培杜永博牛荦陈洁徐定科石岩黄杰
Owner CHINA JILIANG UNIV
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