Method and apparatus for detecting and analyzing variations in a physiologic parameter
First Claim
1. A pulse oximetry system, comprising:
- a sensor comprising;
an emitter configured to emit light at different wavelengths into a tissue bed; and
a detector configured to detect the light from the emitter after dispersion and/or reflection by the tissue bed; and
a pulse oximeter configured to;
receive signals from the sensor that are indicative of characteristics of the light detected by the detector;
utilize the signals to estimate blood oxygen saturation values over time at a high resolution;
detect variations in the blood oxygen saturation values that are smaller in magnitude than an accuracy, display precision, and/or calibration of the blood oxygen saturation values; and
perform control and/or pattern detection functions based on the variations.
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Accused Products
Abstract
The present disclosure is generally directed to identifying and/or analyzing high resolution variations in a measured physiologic parameter, such as blood oxygen saturation (SpO2) measured using pulse oximetry. Present embodiments may include a system including a sensor comprising an emitter capable of emitting light at different wavelengths into a tissue bed, and a detector capable of detecting the light from the emitter after dispersion and/or reflection by the tissue bed. Further, the system may include a pulse oximeter capable of receiving signals from the sensor that are indicative of characteristics of the light detected by the detector, and utilizing the signals to estimate blood oxygen saturation values over time at a high resolution to facilitate detection of variations in the blood oxygen saturation values that are smaller in magnitude than an accuracy, display precision, and/or calibration of the blood oxygen saturation values.
958 Citations
17 Claims
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1. A pulse oximetry system, comprising:
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a sensor comprising;
an emitter configured to emit light at different wavelengths into a tissue bed; and
a detector configured to detect the light from the emitter after dispersion and/or reflection by the tissue bed; anda pulse oximeter configured to; receive signals from the sensor that are indicative of characteristics of the light detected by the detector; utilize the signals to estimate blood oxygen saturation values over time at a high resolution; detect variations in the blood oxygen saturation values that are smaller in magnitude than an accuracy, display precision, and/or calibration of the blood oxygen saturation values; and perform control and/or pattern detection functions based on the variations. - View Dependent Claims (2, 3, 4, 5)
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6. A method of performing pulse oximetry, comprising:
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emitting light from an emitter component of a pulse oximeter sensor at first and second wavelengths useful for measuring oxygen saturation; detecting the light with a detector component of the pulse oximeter sensor; transmitting signals indicative of characteristics of the detected light to a pulse oximeter; estimating blood oxygen saturation values over time at a high resolution based on the signals with the pulse oximeter; detecting variations in the blood oxygen saturation values that are smaller in magnitude than an accuracy, display precision, and/or calibration of the blood oxygen saturation values; and detecting a patient condition and/or controlling a physiologic parameter based on the variations. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A pulse oximeter sensor configured to facilitate detection of high precision changes in blood oxygen saturation estimates obtained via pulse oximetry, comprising:
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a sensor body; a plurality of emitters positioned within the sensor body, wherein each of the plurality of emitters is configured to emit light at a different wavelength, and wherein at least one of the plurality of emitters is selected for sensitivity to small changes in blood oxygen saturation by emitting light within a bounded range of wavelengths; a detector configured to detect the light emitted by the plurality of emitters; and a processor configured to calculate a value of blood oxygen saturation based on the detected light with a precision of 0.1, 0.01, or 0.001. - View Dependent Claims (14, 15, 16, 17)
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Specification