Device and method for detecting blood oxygen saturation based on dual-wavelength lasers
A dual-wavelength laser and detection device technology, which is applied in the field of medical devices, can solve problems such as insufficient speed, low detection accuracy, and low signal spatial resolution, and achieve the effects of suppressing position changes, improving accuracy, and high accuracy
Inactive Publication Date: 2017-02-22
FOSHAN UNIVERSITY
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Problems solved by technology
[0003] To obtain an accurate blood oxygen saturation value, the light intensity measurement of incident light and transmitted light should be as accurate as possible, but the accuracy of the common measurement method is not ideal and the speed is not fast enough, the main reason is that the detector The spatial resolution of the collected signal is not high, the optical scanning is not full-field, and the flow rate of blood will have a great impact on the measurement
Therefore, the existing methods for detecting blood oxygen saturation have the problem of low detection accuracy and need to be improved.
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[0044] A schematic structural diagram of a blood oxygen saturation detection device based on a dual-wavelength laser in this embodiment is shown in figure 1 As shown, it includes a trigger-type dual-wavelength laser light source 1, an optical fiber head 2, a beam expander 3, a reflector 4, a stage 7, an imaging device 6 and a computer 5; the stage 7 is provided with a through hole, and the through hole A frosted glass 8 is embedded in the hole; the trigger-type dual-wavelength laser source 1 alternately emits two wavelengths of laser light. Afterwards, it is directed at the measured sample placed on the frosted glass 8, the laser light is transmitted through the measured sample and enters the imaging device 6, and the imaging device alternately collects the speckle signals of two wavelengths of laser light transmitted through the measured sample and transmits it to the computer as image data 5. The computer processes the received image data to obtain the blood oxygen saturatio...
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The invention relates to a device and a method for detecting blood oxygen saturation based on dual-wavelength lasers. The device comprises a trigger type dual-wavelength laser light source, an optical fiber head, a beam expander, a reflecting mirror, an object carrying table, an imaging device and a computer; ground glass is embedded in the ground glass; the trigger type dual-wavelength laser light source alternately emits the dual-wavelength lasers, the lasers are emitted to the beam expander through the optical fiber head, and the lasers going out of the beam expander are emitted to a to-be-tested sample placed on the ground glass by being reflected by the reflecting mirror and transmit through the to-be-tested sample to enter the imaging device; the imaging device alternately acquires speckle signals generated when the dual-wavelength lasers transmit through the to-be-tested sample, and the speckle signals are taken as image data to be transmitted to the computer; the computer processes the received image data to obtain the blood oxygen saturation of the to-be-tested sample. The device and the method provided by the invention have the benefits that the to-be-tested sample can be subjected to full field scanning without any damage; the speckle signals under the irradiation of different wavelengths are alternately acquired, so that the influence caused by to-be-tested sample position changes and blood oxygen content changes can be effectively restrained; the detected blood oxygen saturation precision is high.
Description
technical field [0001] The present invention relates to the technical field of medical devices, and more specifically, to a device and method for detecting blood oxygen saturation based on a dual-wavelength laser. Background technique [0002] Non-invasive blood oxygen saturation detection is based on the change of hemoglobin's light absorption of different wavelengths, so as to measure the percentage of oxyhemoglobin (HbO) in the total hemoglobin. In the see-through blood oxygen saturation detection, if the attenuation caused by factors such as scattering and reflection is ignored, the blood oxygen saturation can be obtained according to the Beer-Lambert Law. [0003] To obtain an accurate blood oxygen saturation value, the light intensity measurement of incident light and transmitted light should be as accurate as possible, but the accuracy of the common measurement method is not ideal and the speed is not fast enough, the main reason is that the detector The spatial reso...
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IPC IPC(8): G01N21/39
CPCG01N21/39
Inventor 王茗祎韩定安曾亚光朱必锋
Owner FOSHAN UNIVERSITY