Method and apparatus for detecting respiratory disturbances
First Claim
1. A method for detecting a respiratory disturbance, comprising:
- sensing a physiological signal containing a frequency or an amplitude component related to at least two respiratory cycles;
deriving at least one respiratory parameter from the physiologic signal;
detecting a respiratory disturbance event when the at least one respiratory parameter meets or exceeds a predetermined criteria threshold for detecting the respiratory disturbance; and
determining a circulatory delay time by measuring an oxygen saturation and determining the time between the end of the respiratory disturbance and a subsequent minimum or a subsequent maximum oxygen saturation.
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Abstract
A system and method for monitoring respiration including sensing a signal that varies with respiration, deriving a respiration parameter, applying criteria for detecting a respiration disturbance and determining one or more respiratory disturbance metrics. The system preferably includes an implantable sensor with an associated implantable medical device such that chronic respiration monitoring is possible. The implantable medical device may execute methods for detecting and measuring respiratory disturbances or may store data to be transferred to an external device for detecting and measuring respiratory disturbances. Respiratory disturbance detection may trigger a responsive action such as physiological data storage, a change in therapy delivery, or a clinician warning. Assessment of cardiac function may be made based on metrics of respiratory disturbances or a measure of circulatory delay time following detection of a respiratory disturbance.
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Citations
14 Claims
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1. A method for detecting a respiratory disturbance, comprising:
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sensing a physiological signal containing a frequency or an amplitude component related to at least two respiratory cycles; deriving at least one respiratory parameter from the physiologic signal; detecting a respiratory disturbance event when the at least one respiratory parameter meets or exceeds a predetermined criteria threshold for detecting the respiratory disturbance; and determining a circulatory delay time by measuring an oxygen saturation and determining the time between the end of the respiratory disturbance and a subsequent minimum or a subsequent maximum oxygen saturation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification