Methods and systems for qualifying physiological values based on segments of a physiological signal
First Claim
1. A subject monitoring system for determining physiological information of a subject, comprising:
- a sensor configured to generate an intensity signal, wherein the sensor detects light attenuated by the subject; and
processing equipment coupled to the sensor, wherein the processing equipment is configured to;
determine a value indicative of a physiological rate of the subject;
select two signal segments based on the intensity signal, wherein the two signal segments are of two different lengths, and wherein the two different lengths are selected based on the value indicative of the physiological rate of the subject; and
determine whether to qualify the value indicative of the physiological rate of the subject based on the two signal segments.
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Accused Products
Abstract
A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal.
49 Citations
32 Claims
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1. A subject monitoring system for determining physiological information of a subject, comprising:
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a sensor configured to generate an intensity signal, wherein the sensor detects light attenuated by the subject; and processing equipment coupled to the sensor, wherein the processing equipment is configured to; determine a value indicative of a physiological rate of the subject; select two signal segments based on the intensity signal, wherein the two signal segments are of two different lengths, and wherein the two different lengths are selected based on the value indicative of the physiological rate of the subject; and determine whether to qualify the value indicative of the physiological rate of the subject based on the two signal segments. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A processing module for determining physiological information of a subject, wherein the processing module is configured to:
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receive an intensity signal from a detector, wherein the detector detects light attenuated by the subject; determine a value indicative of a physiological rate of the subject; select two signal segments based on the intensity signal, wherein the two signal segments are of two different lengths, and wherein the two different lengths are selected based on the value indicative of the physiological rate of the subject; and determine whether to qualify the value indicative of the physiological rate of the subject based on the two signal segments. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method for processing physiological information of a subject, comprising:
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receiving an intensity signal from a detector, which detects light attenuated by the subject; determining a value indicative of a physiological rate of the subject; selecting two signal segments based on the intensity signal, wherein the two signal segments are of two different lengths, and wherein the two different lengths are selected based on the value indicative of the physiological rate of the subject; and determining, using processing equipment, whether to qualify the value indicative of the physiological rate of the subject based on the two signal segments. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. Non-transitory computer-readable medium for use in determining physiological information of a subject, the computer-readable medium having computer program instructions recorded thereon for:
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receiving an intensity signal from a detector, which detects light attenuated by the subject; determining a value indicative of a physiological rate of the subject; selecting two signal segments based on the intensity signal, wherein the two signal segments are of two different lengths, and wherein the two different lengths are selected based on the value indicative of the physiological rate of the subject; and determining whether to qualify the value indicative of the physiological rate of the subject based on the two signal segments. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32)
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Specification