PULSE OXIMETRY AND PULSE OXIMETER
First Claim
1. A pulse oximetry comprising:
- irradiating living tissue with a plurality of light beams of different wavelengths;
receiving the light beams transmitted through or reflected from the living tissue and converting the received light beams to electric signals which correspond to the different wavelengths;
time-segmenting time series data of the electric signals;
calculating, with respect to each of the segmented time series data of the electric signals, a slope value of a regression line between each two of the electric signals;
calculating SaO2 based on the slope values of each of the segmented time series data of the electric signals;
constructing a histogram of SaO2 for each predetermined number of time segments; and
obtaining a mode value from the histogram as SpO2 to be output of the pulse oximetry.
1 Assignment
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Accused Products
Abstract
A pulse oximetry includes: irradiating living tissue with a plurality of light beams of different wavelengths; receiving the light beams transmitted through or reflected from the living tissue and converting the received light beams to electric signals which correspond to the different wavelengths; time-segmenting time series data of the electric signals; calculating, with respect to each of the segmented time series data of the electric signals, a slope value of a regression line between each two of the electric signals; calculating SaO2 based on the slope value of each of the segmented time series data of the electric signals; constructing a histogram of SaO2 for each predetermined number of time segments; and obtaining a mode value from the histogram as SpO2 to be output of the pulse oximetry.
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Citations
5 Claims
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1. A pulse oximetry comprising:
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irradiating living tissue with a plurality of light beams of different wavelengths; receiving the light beams transmitted through or reflected from the living tissue and converting the received light beams to electric signals which correspond to the different wavelengths; time-segmenting time series data of the electric signals; calculating, with respect to each of the segmented time series data of the electric signals, a slope value of a regression line between each two of the electric signals; calculating SaO2 based on the slope values of each of the segmented time series data of the electric signals; constructing a histogram of SaO2 for each predetermined number of time segments; and obtaining a mode value from the histogram as SpO2 to be output of the pulse oximetry. - View Dependent Claims (2, 3, 4)
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5. A pulse oximeter comprising:
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a light emitter, which irradiates living tissue with a plurality of light beams of different wavelengths; a light receiver, which receives the light beams transmitted through or reflected from the living tissue and which converts the received light beams to electric signals which correspond to the different wavelengths; a processor, which segments time series data of the electric signals; a slope value calculator, which calculates, with respect to each of the segmented time series data of the electric signals, a slope value of a regression line between each two of the electric signals; an SaO2 calculator, which calculates SaO2 based on the slope values of each of the segmented time series data of the electric signals; a histogram constructer, which constructs a histogram of SaO2 for each predetermined number of time segments; and an obtainer, which obtains a mode value from the histogram as SpO2 to be output of the pulse oximeter.
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Specification