Using activity-based rest disturbance as a metric of sleep apnea
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United States of America Patent
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Oct 3, 2006
Issued Date -
N/A
app pub date -
Jun 27, 2002
filing date -
Jun 27, 2002
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Abstract
An implantable cardiac device is programmed to monitor short term activity changes that occur while a patient is at rest to produce a sleep disturbance metric that is useful in analyzing and/or treating sleep apnea. After the implantable cardiac device confirms that a patient is at rest, the device monitors an instantaneous signal from an activity sensor to detect variances from normal rest mode activity. When the variances exceed a preset threshold for a short time period (e.g., less than 30 40 sec.), the patient is presumed to be experiencing a form of sleep disturbance as opposed to conscious or wakeful activity. These short term events are recorded as sleep disturbance events. The sleep disturbance metric are reported to a physician as a diagnostic to help ascertain the severity of sleep apnea or to evaluate the effectiveness of pacing therapies being applied to treat sleep apnea.
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