Method and apparatus to detect and monitor the frequency of obstructive sleep apnea
First Claim
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1. A method of detecting and monitoring obstructive sleep apnea, comprising:
- measuring impedance minute ventilation to detect a change in the impedance minute ventilation corresponding to a period of hyperpneic respiration, wherein the change includes an increase in impedance minute ventilation followed by a decrease in impedance minute ventilation;
detecting an increasing amount of movement of a patient during the period of hyperpneic respiration; and
determining the presence of obstructive sleep apnea responsive to the change in the impedance minute ventilation coinciding with the increasing movement of the patient.
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Abstract
The present invention provides a method and apparatus for detecting and monitoring obstructive sleep apnea. The apparatus includes an intracardiac impedance sensor to measure intracardiac impedance, a movement sensor to measure an amount of movement of a patient, and a controller operatively coupled to said intracardiac impedance sensor and said movement sensor, said controller adapted to receive at least one of an intracardiac impedance and the amount of movement of the patient and detect obstructive sleep apnea based upon said intracardiac impedance and said movement.
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9 Claims
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1. A method of detecting and monitoring obstructive sleep apnea, comprising:
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measuring impedance minute ventilation to detect a change in the impedance minute ventilation corresponding to a period of hyperpneic respiration, wherein the change includes an increase in impedance minute ventilation followed by a decrease in impedance minute ventilation; detecting an increasing amount of movement of a patient during the period of hyperpneic respiration; and determining the presence of obstructive sleep apnea responsive to the change in the impedance minute ventilation coinciding with the increasing movement of the patient. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9)
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4. A medical device for detecting and monitoring obstructive sleep apnea, comprising:
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means for measuring impedance minute ventilation to detect a change in the impedance minute ventilation corresponding to a period of hyperpneic respiration, wherein the change includes an increase in impedance minute ventilation followed by a decrease in impedance minute ventilation; means for detecting an increasing amount of movement of a patient during the period of hyperpneic respiration; and means for determining the presence of obstructive sleep apnea responsive to the change in the impedance minute ventilation coinciding with the increasing movement of the patient.
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Specification