Anti-interference blood oxygen measuring device and blood oxygen probe

A technology of blood oxygen probe and measuring device, which is applied in the field of anti-interference blood oxygen measuring device and blood oxygen probe, which can solve the problems of weak blood oxygen signal and easy to be affected by various external interference, so as to reduce the transmission distance and enhance the Anti-interference performance, the effect of preventing adverse effects

Inactive Publication Date: 2009-06-17
SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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Problems solved by technology

Since the blood oxygen signal detected by the photosensitive element is relatively weak, this solution is extremely susceptible to various external interferences during signal transmission.

Method used

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  • Anti-interference blood oxygen measuring device and blood oxygen probe
  • Anti-interference blood oxygen measuring device and blood oxygen probe

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Embodiment Construction

[0017] The features and advantages of the present invention will be described in detail with reference to the accompanying drawings.

[0018] First introduce the principle of blood oxygen measurement. When pulse waves are used to cause the pulsation of arterial blood in the end of human tissue, the optical properties of oxygenated hemoglobin and reduced hemoglobin are different in the red light spectral region and infrared region, thus affecting the light transmittance of fingers to red light and infrared light. When red light and infrared light with a certain light intensity are added to the finger, by detecting the transmitted light intensity of the two wavelengths respectively, the content of oxyhemoglobin can be calculated by the ratio of the finger to the change in the two optical densities, so that Calculate blood oxygen saturation.

[0019] Spectrophotometry is commonly used to measure blood oxygen saturation, including transmitted light method and reflected light meth...

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Abstract

The present invention discloses a blood oxygen measuring device which prevents interference, which comprises a blood oxygen probe and an information processing module. The blood oxygen probe comprises a radiating device which is used for radiating at least two lights with different wavelengths, a photosensitive element which is used for receiving the optical signal carrying the blood oxygen saturation information of tested tissue and switching to an analog electric signal, and an A / D converting circuit which is used for converting the analog electric signal to the digital signal. The input end of A / D converting circuit is coupled with the output end of the photosensitive element. The output end of A / D converting circuit is coupled to the input end of information processing module through a signal transmission line. The invention also discloses the blood oxygen probe adopted in the blood oxygen measuring device. The blood oxygen measuring device firstly converts the analog detecting signal to digital signal and then outputs and processes through adding an A / D converting circuit in the blood oxygen probe, thereby effectively reducing the transmission distance of analog signal which is easily interfered by outside and reinforcing the interference resistance of the blood oxygen measuring device.

Description

【Technical field】 [0001] The invention relates to a device for measuring blood oxygen information, in particular to an anti-interference blood oxygen measuring device and a blood oxygen probe. 【Background technique】 [0002] At present, the basic structure of blood oxygen saturation measuring devices at home and abroad includes a blood oxygen probe and a signal processing device. The blood oxygen probe is a sensor composed of a light-emitting diode and a photosensitive element. The function of the photosensitive element is to convert the optical signal with blood oxygen saturation information passing through the end of the tissue under test into an analog electrical signal and output it. After processing, the analog signal is digitized to obtain a digital value, and then a certain signal processing algorithm is used to calculate blood oxygen saturation. In the existing blood oxygen saturation measuring device, the blood oxygen probe outputs an analog electrical signal, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/1455A61B5/0205
Inventor 张旭李旭
Owner SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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