MACRO-CONTROL OF TREATMENT FOR SLEEP DISORDERED BREATHING
First Claim
1. A method for monitoring and treating sleep disordered breathing by using two control loops, one inner and one outer, wherein the inner loop is adapted to provide at least two treatment modes and the outer loop is adapted to monitor the effectiveness of therapy provided by the inner loop and to control a change in modes if necessary, wherein the effectiveness of therapy is monitored by assessing the number and/or types of respiratory events occurring over a period of time, and the outer loop exerts control over operational parameters of the inner loop.
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Abstract
A method and apparatus for treating sleep disordered breathing. An arousal index is determined for use in an outer loop of a control algorithm, the arousal index being a measure of the frequency of sleep arousals. The respiratory airflow signal in an inner loop of the control algorithm is monitored to detect an airway obstruction. If the arousal index is high, then the sensitivity of obstruction detection and/or the aggressiveness of the treatment is increased, and if the arousal index is low, then the sensitivity of the obstruction detection and/or the aggressiveness of the treatment is decreased.
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23 Claims
- 1. A method for monitoring and treating sleep disordered breathing by using two control loops, one inner and one outer, wherein the inner loop is adapted to provide at least two treatment modes and the outer loop is adapted to monitor the effectiveness of therapy provided by the inner loop and to control a change in modes if necessary, wherein the effectiveness of therapy is monitored by assessing the number and/or types of respiratory events occurring over a period of time, and the outer loop exerts control over operational parameters of the inner loop.
- 15. Apparatus for monitoring and treating sleep disordered breathing comprising an inner loop control mechanism adapted to provide at least two treatment modes, and an outer loop control mechanism adapted to monitor the effectiveness of therapy provided by the inner loop control mechanism and to control a change in mode if necessary, wherein the effectiveness of therapy is monitored by assessing the number and/or types of respiratory events occurring over a period of time, and the outer loop control mechanism exerts control over operational parameters of the inner loop control mechanism.
Specification