Activity detector for a closed loop neuromodulator
First Claim
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1. An abnormal respiration detector comprising:
- a sampling clock, configured to generate clock pulses at a predetermined frequency;
a first gate configured to receive digital airflow information from a hardened sensor interface of a closed loop neural modulator, to pass the clock pulses from the sampling clock to a first counter when the digital airflow information is in a first respiration state, and to not pass the clock pulses from the sampling clock to the first counter when the digital airflow information is in a second respiration state;
wherein the first counter is coupled to the first gate and configured to sum a first count of clock pulses passed from the first gate;
a first magnitude comparator configured to receive the first count from the first counter and to compare the first count to a first count threshold; and
an activity gate coupled to the first magnitude counter and configured to produce a signal indicative of respiration activity using an output of the first magnitude comparator.
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Abstract
This document discusses, among other things, method and apparatus for detecting abnormal respiration activity. Clock pulses can be passed through a first gate when digital airflow information indicates a first respiration state, summed, and compared to a first count threshold, and a respiration activity output can be generated using the comparison.
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Citations
20 Claims
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1. An abnormal respiration detector comprising:
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a sampling clock, configured to generate clock pulses at a predetermined frequency; a first gate configured to receive digital airflow information from a hardened sensor interface of a closed loop neural modulator, to pass the clock pulses from the sampling clock to a first counter when the digital airflow information is in a first respiration state, and to not pass the clock pulses from the sampling clock to the first counter when the digital airflow information is in a second respiration state; wherein the first counter is coupled to the first gate and configured to sum a first count of clock pulses passed from the first gate; a first magnitude comparator configured to receive the first count from the first counter and to compare the first count to a first count threshold; and an activity gate coupled to the first magnitude counter and configured to produce a signal indicative of respiration activity using an output of the first magnitude comparator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system comprising:
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a respiration sensor configured to detect respiration information from a patient; a close loop neural modulator, configured to optimize sleep. therapy for the patient and to produce a digital signal indicative of respiration activity using the detected respiration information, the closed loop neural modulator comprising; a respiration activity sensor configured to detect abnormal respiration information using the digital signal indicative of respiration activity, the respiration activity sensor comprising a sampling clock configured to generate clock pulses at a predetermined frequency; an inhalation gate configured to receive the digital signal indicative of respiration activity from a sensor interface, to pass the clock pulses from the sampling clock to an inhalation counter when the digital signal indicative of respiration activity is indicative of inhalation, and to not pass the clock pulses from the sampling clock to the inhalation counter when the digital signal indicative of respiration activity is not indicative of inhalation; an exhalation gate configured to receive the digital signal indicative of respiration activity from the sensor interface, to pass the clock pulses from the sampling clock to an exhalation counter when the digital signal indicative of respiration activity is indicative of exhalation, and to not pass the clock pulses from the sampling clock to the exhalation counter when the digital signal indicative of respiration activity is not indicative of exhalation; wherein the inhalation counter is coupled to the inhalation gate and configured to sum a first count of clock pulses passed from the inhalation gate; wherein the exhalation counter is coupled to the exhalation gate and configured to sum a second count of clock pulses passed from the exhalation gate; an inhalation magnitude comparator coupled to the inhalation counter, the inhalation magnitude comparator configured to compare the first count to an inhalation threshold and to produce an inhalation activity signal using the comparison of the first count to the inhalation threshold; an exhalation magnitude comparator coupled to the exhalation counter;
the exhalation magnitude comparator configured to compare the second count to an exhalation threshold and to produce an exhalation activity signal using the comparison of the second count to the exhalation threshold; anda respiration activity gate coupled to the inhalation magnitude counter and the exhalation magnitude counter, the activity gate configured to produce a signal indicative of abnormal respiration activity using the inhalation activity signal and the exhalation activity signal; wherein the closed loop neural modulator is configured to detect a sleep disorder using the signal indicative of abnormal respiration activity, to provide a first stimulus to a transducer, the first stimulus configured to not interrupt the detected sleep disorder, and to provide a second stimulus to the transducer, the second stimulus having more energy than the first stimulus and configured to interrupt the detected sleep disorder event; and wherein the transducer is configured to deliver the first and second stimuli to the patient. - View Dependent Claims (14, 15)
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16. A method for detecting abnormal respiration activity, the method comprising:
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generating clock pulses at a predetermined frequency; receiving a digital airflow signal at a first gate; passing the clock pulses through the first gate when the digital airflow signal indicates a first respiration state; summing a first count of clock pulses passed through the first gate; comparing the first count to a first count threshold; and generating a respiration activity output using the comparison of the first count to the first count threshold. - View Dependent Claims (17, 18, 19, 20)
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Specification