Non-contact detection method for oxyhemoglobin saturation

Abstract

The invention discloses a non-contact detection method for the oxyhemoglobin saturation. The method comprises the following steps that an industrial camera or a camera is started for recording a facevideo of an examinee; a forehead glabellar periphery of the examinee in the video is selected as an interested area, and a blood volume pulse wave signal is extracted; images, different in resolutionratio, of an interested frequency band and corresponding original images are added and synthesized to obtain a final image, the gray average change of the interested area is used for representing thechange of the illumination intensity of reflection light, and a blood volume pulse wave waveform is obtained; an interested frequency band signal is reconstructed, a reconstruction signal is used forobtaining a blood volume pulse wave alternating component waveform graph, peak valley value information of a pulse wave is extracted from the graph to obtain an average value through solution, and anoxyhemoglobin saturation value is obtained through calculation. According to the method, non-contact detection of a common industrial dual-camera with an optical filter is achieved, the measurement result is high in accuracy, detection is conveniently conducted, and the demand for daily oxyhemoglobin saturation detection can be met.

Description

technical field [0001] The invention relates to the technical field of blood oxygen detection, in particular to a non-contact blood oxygen saturation detection method. Background technique [0002] The purpose of the present invention is to provide a non-contact blood oxygen saturation detection method, using a dual camera with a narrow-band filter as a video acquisition device to obtain two different wavelengths of light transmitted or reflected by human tissue The maximum value and the minimum value of the intensity, that is, to obtain the blood volume pulse wave corresponding to the two lines of light, respectively obtain the maximum value and minimum value of the two pulse wave waveforms, and obtain the blood oxygen saturation. [0003] The technical scheme most similar to the present invention has: 1, the traditional blood oxygen saturation measuring method is to first carry out human body blood collection, utilize blood gas analyzer to carry out electrochemical analysi...

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Problems solved by technology

[0003] The technical scheme most similar to the present invention has: 1, the traditional blood oxygen saturation measuring method is to first carry out human body blood collection, utilize blood gas analyzer to carry out electrochemical analysis again, measure blood oxygen partial pressure PO2 calculate blood oxygen saturation , this method is cumbersome, and continuous monitoring cannot be carried out; 2. Finger sleeve photoelectric sensors are used. When measuring, you only need to put the sensor on the human finger, use the finger as a transparent container for hemoglobin, and use red light with a wavelength of 660nm. Light and 940nm near-infrared light are used as the incident light source to measure the light transmission intensity through the tissue bed to calculate the hemoglobin concentration and blood oxygen saturation. The instrument can display the blood oxygen saturation of the human body, providing a continuous non-invasive Blood Oxygen Measuring Instrument

[0004] The disadvantage of using a blood gas analyzer to detect blood oxygen saturation is that it needs to collect blood from the human body, perform electrochemical analysis with professional instruments, and measure blood oxygen partial pressure PO2 to calculate blood oxygen saturation. This method is cumbersome. without continuous monitoring

[0005] The disadvantages of using the fingertip photoelectric sensor for blood oxygen saturation detection are: contact measurement has limitations in use, for example, patients with large area burns and scalds cannot perform contact measurement, and the delicate skin of newborns is easily damaged by sticky probes. Some people with sensitive skin may be allergic to the adhesive or rubber on the probe, etc.

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