Reflective pulse blood oxygen detecting method based on diffusion theory

A pulse oximetry and detection method technology, applied in the field of human physiological parameter measurement, can solve the problem of large error in measurement values

Inactive Publication Date: 2012-07-18
TIANJIN UNIV
View PDF2 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oximeter based on the original Lambert Beer's law as the theoretical model takes the change of blood volume and arterial blood absorption coefficient as the investigation object, and ignores the scattering of light by the tissue, which leads to the deviation of the calculation result.
Generally, the measurement accuracy of the blood oxygen value is 2% to 6% in the range of 75% to 100%, and the error of this measurement value is larger when the blood oxygen saturation is low

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Reflective pulse blood oxygen detecting method based on diffusion theory
  • Reflective pulse blood oxygen detecting method based on diffusion theory
  • Reflective pulse blood oxygen detecting method based on diffusion theory

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] The principle of the hardware platform that detection method of the present invention is based on is as figure 2 As shown, the pulse oximeter measurement platform includes a voltage conversion circuit that provides a stable and suitable voltage for the entire hardware platform, a light source drive circuit that supplies power to dual-wavelength LEDs, and generates two orthogonal pulse sequences to perform two-wavelength light respectively. The switch circuit that modulates and controls LED lighting, D-LED type dual-wavelength light-emitting diode, converts the light intensity of the received light into a photodiode (Photo Diode, PD) of current I, and converts the difficult-to-measure current signal into an easy-to-measure The I-U conversion circuit for the voltage signal, the sampling and holding circuit for filtering ambient light, the differential amplifier circuit and the correction circuit, the DSP application template produced by TI for further processing of the di...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of human body physiological parameter measurement, and relates to a reflective pulse blood oxygen detecting method based on diffusion theory, which includes the steps: (1) establishing the relationship between organizer absorption coefficient and SaO2 (oxygen saturation); (2) establishing the relationship between reflection light intensity and organizer absorption coefficient; (3) establishing the relationship between an R value and the reflection light intensity; (4) acquiring pulse wave signals of a red light wavelength and a near-infrared light wavelength; (5) detecting features of pulse wave signals of the infrared light wavelength to extract peak values which are the maximum value and the minimal value of the reflection light intensity; (6) calculating blood oxygen saturation coefficient R; and (7) plugging the R value into a calibration curve to obtain needed blood oxygen saturation coefficient in real time. The reflective pulse blood oxygen detecting method based on the diffusion theory can be used for realizing non-invasive real-time measurement, and is higher in precision and wider in application range.

Description

technical field [0001] The invention belongs to the technical field of measuring human physiological parameters, and relates to a pulse blood oxygen detection method. Background technique [0002] The physiological activities of the human body require internal energy and nutrients, and different activities require different energy. Blood transports oxygen and nutrients to organs and plays a vital role in the body's metabolism. Hypoxia will affect the normal operation of a series of functions of the human body, causing symptoms of hypoxia in mild cases, and life-threatening in severe cases. Therefore, the monitoring of oxygen transport and combination process in human tissue, the concentration of oxygen in human internal tissue and blood has far-reaching significance for clinical diagnosis and treatment. [0003] Oxygen saturation detection provides timely and effective clinical evidence for doctors in clinical anesthesia operations and intensive care applications, and is a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/1455
Inventor 赵会娟孟伟刘明高峰
Owner TIANJIN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap