Time-segmented pulse oximetry and pulse oximeter performing the same
First Claim
1. A method of measuring an oxygen saturation in blood of a subject, comprising:
- irradiating a living tissue of the subject with a first light beam having a first wavelength and a second light beam having a second wavelength different from the first wavelength;
generating a first electrical signal from the first light beam reflected from or transmitted through the living tissue;
generating a second electrical signal from the second light beam reflected from or transmitted through the living tissue;
dividing the first electrical signal into a plurality of first segments each of which includes a part of the first electrical signal for a predetermined time period;
dividing the second electrical signal into a plurality of second segments each of which includes a part of the second electrical signal for the predetermined time period; and
calculating a gradient of a regression line between every one of the first segments and an associated one of the second segments, thereby obtaining a plurality of gradients.
1 Assignment
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Accused Products
Abstract
To measure oxygen saturation in blood, living tissue is irradiated with a first light beam having a first wavelength and a second light beam having a second wavelength. A first electrical signal is generated from the first light beam reflected from or transmitted through the tissue. A second electrical signal is generated from the second light beam reflected from or transmitted through the tissue. The first electrical signal is divided into a plurality of first segments, each including a part of the first electrical signal for a predetermined time period. The second electrical signal is divided into a plurality of second segments, each including a part of the second electrical signal for the predetermined time period. A gradient of a regression line is calculated between every one of the first segments and an associated one of the second segments, thereby obtaining a plurality of gradients.
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Citations
6 Claims
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1. A method of measuring an oxygen saturation in blood of a subject, comprising:
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irradiating a living tissue of the subject with a first light beam having a first wavelength and a second light beam having a second wavelength different from the first wavelength; generating a first electrical signal from the first light beam reflected from or transmitted through the living tissue; generating a second electrical signal from the second light beam reflected from or transmitted through the living tissue; dividing the first electrical signal into a plurality of first segments each of which includes a part of the first electrical signal for a predetermined time period; dividing the second electrical signal into a plurality of second segments each of which includes a part of the second electrical signal for the predetermined time period; and calculating a gradient of a regression line between every one of the first segments and an associated one of the second segments, thereby obtaining a plurality of gradients. - View Dependent Claims (2, 3)
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4. A pulse oximeter operable to measure an oxygen saturation in blood of a subject, comprising:
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a light emitter, adapted to irradiate a living tissue of the subject with a first light beam having a first wavelength and a second light beam having a second wavelength different from the first wavelength; a signal generator, operable to generate a first electrical signal from the first light beam reflected from or transmitted through the living tissue, and operable to generate a second electrical signal from the second light beam reflected from or transmitted through the living tissue; a processor, operable to; divide the first electrical signal into a plurality of first segments each of which includes a part of the first electrical signal for a predetermined time period; divide the second electrical signal into a plurality of second segments each of which includes a part of the second electrical signal for the predetermined time period; and calculate a gradient of a regression line between every one of the first segments and an associated one of the second segments, thereby obtaining a plurality of gradients. - View Dependent Claims (5, 6)
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Specification