Method and apparatus for detecting respiratory disturbances
First Claim
1. A device for detecting a respiratory disturbance, comprising:
- means for sensing a physiological signal containing a frequency component or an amplitude component related to a common characteristic of at least two respiratory cycles;
means for deriving at least one respiratory parameter from the physiologic signal;
means for 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
means for determining a circulatory delay time comprising means for measuring an oxygen saturation and means for determining a time between the respiratory disturbance and one of a subsequent minimum and 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.
81 Citations
21 Claims
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1. A device for detecting a respiratory disturbance, comprising:
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means for sensing a physiological signal containing a frequency component or an amplitude component related to a common characteristic of at least two respiratory cycles; means for deriving at least one respiratory parameter from the physiologic signal; means for 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 means for determining a circulatory delay time comprising means for measuring an oxygen saturation and means for determining a time between the respiratory disturbance and one of a subsequent minimum and a subsequent maximum oxygen saturation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A computer readable medium for storing a set of computer instructions for performing the following method, comprising:
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instructions for sensing a physiological signal containing a frequency component or an amplitude component related to a common characteristic of at least two respiratory cycles; instructions for deriving at least one respiratory parameter from the physiologic signal; instructions for 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 instructions for determining a circulatory delay time comprising measuring an oxygen saturation and determining a time between the respiratory disturbance and a subsequent minimum or a subsequent maximum oxygen saturation. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification