DETECTION OF HEART FAILURE USING A PHOTOPLETHYSMOGRAPH
First Claim
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1. A method for diagnosis, comprising:
- receiving a signal associated with blood oxygen saturation of a patient during sleep;
filtering the signal so as to eliminate signal components at frequencies equal to and greater than a respiratory frequency of the patient; and
processing the filtered signal to detect a pattern corresponding to multiple cycles of periodic breathing.
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Abstract
A method for diagnosis includes receiving a signal associated with blood oxygen saturation of a patient during sleep. The signal is filtered so as to eliminate signal components at frequencies equal to and greater than a respiratory frequency of the patient. The filtered signal is processed to detect a pattern corresponding to multiple cycles of periodic breathing.
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Citations
82 Claims
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1. A method for diagnosis, comprising:
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receiving a signal associated with blood oxygen saturation of a patient during sleep;
filtering the signal so as to eliminate signal components at frequencies equal to and greater than a respiratory frequency of the patient; and
processing the filtered signal to detect a pattern corresponding to multiple cycles of periodic breathing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. Apparatus for diagnosis, comprising:
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a sensor, which is configured to be coupled to a body of a patient during sleep and to output a signal associated with blood oxygen saturation in the body; and
a processor, which is coupled to filter the signal so as to eliminate signal components at frequencies equal to and greater than a respiratory frequency of the patient, and to process the filtered signal to detect a pattern corresponding to multiple cycles of periodic breathing. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68)
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- 69. A computer software product, comprising a computer-readable medium in which program instructions are stored, which instructions, when read by a computer, cause the computer to receive a signal associated with blood oxygen saturation in a body or a patient, and to filter the signal so as to eliminate signal components at frequencies equal to and greater than a respiratory frequency of the patient, and to process the filtered signal to detect a pattern corresponding to multiple cycles of periodic breathing.
Specification