Blood oxygen measurer and method

A measuring device and blood oxygen technology, applied in the field of medical products, can solve the problems of signal saturation, measurement, inability to perform blood oxygen saturation and pulse rate, etc., and achieve the effect of high popularization and extended use range

Active Publication Date: 2012-06-27
EDAN INSTR
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Problems solved by technology

[0003] Since this technology uses red light and infrared light and its transmitted light or reflected light for detection, and the detected blood oxygen signal is a weak signal, Therefore, it is easy to be interfered by external ambient light, and ambient light is a relatively strong signal, which makes it easy to cause signal saturation during blood oxygen measurement after interference, making it impossible to measure blood oxygen saturation and pulse rate. Especially when used in out-of-hospital transfer, the problem will be more prominent

Method used

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Embodiment Construction

[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0033] see Figure 1 to Figure 4 , a device for blood oxygen measurement in the present invention mainly includes:

[0034] A photocurrent signal acquisition unit 101, the photocurrent signal acquisition unit 101 is used to acquire a photocurrent signal containing the pulse signal of the subject;

[0035] A signal conversion unit 102, the signal conversion unit 102 is connected with the photocurrent signal acquisition unit 101, and is used to convert the collected photocurrent signal into a corresponding voltage signal; the signal conversion unit 102 includes: a resistor, a capacitor, and an...

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Abstract

The invention relates to the technical field of medical treatment products, in particular to a blood oxygen measurer and a method. The blood oxygen measurer comprises a light current signal acquisition unit, a signal conversion unit, an environment light signal filtering unit, a voltage signal amplification unit, an analog-to-digital conversion unit, a waveform signal extraction unit, a noise analysis unit, a waveform processing unit and a blood oxygen data calculating unit which are successively connected according to a signal flow direction, and the environment light signal filtering unit is connected with the signal conversion unit and used for filtering interference of environment light signals. The blood oxygen measurer is provided with the environment light signal filtering unit, when blood oxygen is measured, saturation of measured signals due to interference of environment light is avoided, so that the blood oxygen can be measured in various environments, the service range of the blood oxygen measurer is greatly expanded, and popularization is quite high.

Description

technical field [0001] The invention relates to the technical field of medical products, in particular to a blood oxygen measuring device and method. Background technique [0002] In the pulse-type non-invasive blood oxygen saturation measurement technology, the transmitted light or reflected light of human tissue is generally modulated by the pulse fluctuation through red light and infrared light, and then the transmitted light or reflected light is transmitted by the blood oxygen receiving sensor, that is, the photodiode. It is converted into a current signal, amplified and adjusted by the corresponding analog circuit in the subsequent stage, and the blood oxygen signal modulated by the pulse pulse is collected by an analog-to-digital converter, and sent to the single-chip microcomputer for related calculations, and the blood oxygen saturation and pulse rate are completed through the corresponding algorithm. Calculation of parameters such as rate and pulse waveform. [00...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/1455
Inventor 胡士峰涂娅玲
Owner EDAN INSTR
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