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Method for improving detection accuracy of blood oxygen saturation

A technology for detection accuracy and saturation, which is applied in the field of blood oxygen saturation detection, improving the detection accuracy of blood oxygen saturation, and can solve the problem of low detection accuracy and so on.

Inactive Publication Date: 2011-01-12
SOLARIS MEDICAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a blood oxygen saturation detection method to solve the problem that the detection accuracy of the existing blood oxygen saturation detection method is not high

Method used

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  • Method for improving detection accuracy of blood oxygen saturation
  • Method for improving detection accuracy of blood oxygen saturation
  • Method for improving detection accuracy of blood oxygen saturation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] This specific embodiment provides a method for improving the detection accuracy of blood oxygen saturation. The flowchart of the method is as follows: figure 1 shown:

[0058] First, the original signal is acquired, and the original signal is band-pass filtered. In this specific embodiment, the red light and infrared light blood oxygen raw signals are collected under the condition of small slow motion of the palm, and band-pass filtering is performed on the collected raw signals, and the pass-band of the band-pass filter is 0.5-15 Hz. The acquired original signal is figure 2 As shown, the signal after bandpass filtering is as follows image 3 shown.

[0059] Then, the blood oxygen independent component and the interference independent component are calculated, and the separation matrix W and the mixing matrix A are estimated. That is, the band-pass filtered signal is calculated based on the independent component analysis algorithm (Infomax-ICA) based on the criteri...

Embodiment 2

[0085] This specific implementation manner is roughly similar to the first embodiment, the difference is that the collected original blood oxygen signal is extracted when the palm moves rapidly. The extracted raw data is as Figure 9 shown. The band-pass filtered signal is Figure 10 shown. The independent component of blood oxygen signal and the independent component of noise obtained after ICA processing are as follows: Figure 11 shown. The two "clean" blood oxygen signals obtained are as Figure 12 shown. The two noise signals obtained are as follows Figure 13 shown.

Embodiment 3

[0087] This specific implementation manner is roughly similar to the first embodiment, except that the collected blood oxygen original signal is extracted when the arm drives the palm to move at a relatively slow speed. The extracted raw data is as Figure 14 shown. The band-pass filtered signal is Figure 15 shown. The independent component of blood oxygen signal and the independent component of noise obtained after ICA processing are as follows: Figure 16 shown. The two "clean" blood oxygen signals obtained are as Figure 17 shown. The two noise signals obtained are as follows Figure 18 shown.

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Abstract

The invention discloses a method for improving the detection accuracy of blood oxygen saturation. The method comprises the following steps of: first, acquiring an original blood oxygen signal and performing band-pass filter on the original signal; then, calculating the blood oxygen signal subjected to the band-pass filter by an information maximum independence-based independent component analysis algorithm to obtain a blood oxygen independent component and an interference independent component and estimating a separated matrix W and a mixed matrix A; identifying and removing the interference independent component and acquiring two paths of clean blood oxygen signals; and finally calculating the blood oxygen saturation by using the clean blood oxygen signals. By the method for improving the detection accuracy of the blood oxygen saturation in the technical scheme of the invention, the interference caused by noise during calculation of a rate value can be effectively reduced, the aim of improving the detection accuracy of the blood oxygen saturation can be fulfilled by setting and judging an accuracy value; and the method has the advantages of extracting a double-wavelength blood oxygen signal acquired under different environments on line and ensuring more stable calculation accuracy, along with low operation complexity.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a blood oxygen saturation detection technology, and in particular to a method for improving the detection accuracy of blood oxygen saturation. Background technique [0002] Dual-wavelength oxygen saturation (SPO2) non-invasive detection technology based on red light and infrared light has been widely used in clinical practice. Compared with the traditional invasive blood oxygen detection method, although the dual-wavelength blood oxygen saturation detection method has many advantages (such as convenient operation and continuous monitoring), its detection accuracy is often limited by the red light and infrared light blood oxygen detection signals. degree of purity. Because in the process of acquiring dual-wavelength blood oxygen detection signals, there will inevitably be a large number of interference components, such as movement interference caused by voluntary or invol...

Claims

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Application Information

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IPC IPC(8): A61B5/1455
Inventor 吴小培刘冠聪
Owner SOLARIS MEDICAL TECH
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