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Measurement method of blood oxygen saturation for eliminating motion interference

A motion interference and measurement method technology, applied in the field of blood oxygen saturation measurement, can solve the problem of weak ability to eliminate periodic interference

Inactive Publication Date: 2010-01-27
FOURTH MILITARY MEDICAL UNIVERSITY
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  • Abstract
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  • Claims
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Problems solved by technology

Since the MCDST algorithm mainly relies on the assumption that the interference signal is orthogonal to the ideal signal, the algorithm is weak in eliminating periodic interference

Method used

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  • Measurement method of blood oxygen saturation for eliminating motion interference
  • Measurement method of blood oxygen saturation for eliminating motion interference
  • Measurement method of blood oxygen saturation for eliminating motion interference

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Embodiment Construction

[0023] The blood oxygen saturation measurement method for eliminating motion interference of the present invention is implemented in the actual blood oxygen saturation measurement:

[0024] (1) Determine the relationship between arterial blood oxygen saturation and r according to the measurement system, where r = I AC λ 1 / I DC λ 1 I AC λ 2 / I DC λ 2 , It can be calibrated by the oximeter analyzer, and the relationship of this method is S P o 2 =110-2...

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Abstract

The invention discloses a measurement method of blood oxygen saturation for eliminating motion interference. Photo-plethysmography (PPG) is interfered under motion influence, which results in a great error generated in noninvasive measurement of blood oxygen saturation. The measurement method comprises the following steps: firstly taking the difference between two wavelength-standardized PPG signals as an ideal signal to create an adaptive filter, filtering the two wavelength PPG signals to weaken partial interference, respectively building a reference signal series according to 0-100% of the blood oxygen saturation, and computing the current arterial oxygen saturation with the correlation between FFT coefficients of a reference signal and an original signal as an identification method of the arterial oxygen saturation.

Description

technical field [0001] The invention relates to a method for measuring blood oxygen saturation, in particular to a method for measuring blood oxygen saturation that eliminates motion interference, and the method can realize the measurement of arterial blood oxygen saturation when a subject is in motion. Background technique [0002] Because the PPG signal is susceptible to motion interference, the use of blood oxygen saturation measurement in portable and wearable measurement devices is limited. [0003] At present, the commonly used methods include FFT method, motion acceleration method, three light source sensor method and various signal processing methods. For the measurement of saturation, it has been proved that these methods are limited to the elimination of motion interference. [0004] The discrete saturation transformation algorithm (DST) proposed by Masimo is widely considered as an ideal anti-motion blood oxygen saturation measurement method because of its low fa...

Claims

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Application Information

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IPC IPC(8): A61B5/145
Inventor 董秀珍付峰张坤焦腾张雯舒强
Owner FOURTH MILITARY MEDICAL UNIVERSITY
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