Method and apparatus for arousal detection
First Claim
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1. A method for detecting arousal from sleep in a patient by the steps of:
- (a) sensing a signal characteristic of respiratory effort of the patient;
(b) sampling the sensed signal at a predetermined interval to provide a digitized respiratory effort waveform;
(c) monitoring the digitized signal for at least one parameter of the waveform indicating a body movement artifact; and
(d) comparing at least one value for the parameter with a predetermined limit to determine whether the patient is aroused.
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Abstract
A method and device for detecting arousal from sleep in a patient by monitoring a respiratory effort waveform of the patient. At least one parameter of the waveform that is characteristic of a body movement artifact is monitored and compared with a predetermined limit. This method of arousal detection is particularly useful for treating sleep apnea by bursts of electrical stimulation in response to sensed inspiration since it allows the electrical stimulation to be reduced or stopped promptly as the patient wakes.
458 Citations
32 Claims
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1. A method for detecting arousal from sleep in a patient by the steps of:
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(a) sensing a signal characteristic of respiratory effort of the patient; (b) sampling the sensed signal at a predetermined interval to provide a digitized respiratory effort waveform; (c) monitoring the digitized signal for at least one parameter of the waveform indicating a body movement artifact; and (d) comparing at least one value for the parameter with a predetermined limit to determine whether the patient is aroused. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for treatment of a patient by electrical stimulation upon detecting arousal from sleep in the patient by the steps of:
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(a) providing electrical stimulation to the patient; (b) monitoring a respiratory effort waveform of the patient for at least one parameter of the waveform indicating a body movement artifact; (c) comparing at least one value for the parameter with a predetermined limit to determine whether the patient is aroused; and (d) adjusting treatment of the patient upon detection of arousal by reducing electrical stimulation applied to the patient upon arousal.
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17. A medical device for the detection of arousal from sleep in a patient comprising:
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(a) signal sensing means for sensing a signal characteristic of respiratory effort of the patient; (b) signal sampling means for sampling the sensed signal at a predetermined interval to provide a digitized respiratory effort waveform; (c) monitoring means for monitoring the digitized signal for at least one parameter of the waveform indicating a body movement artifact; and (d) comparison means associated with said monitoring means for comparing at least one value for the parameter with a predetermined limit to determine whether the patient is aroused. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A medical device for treatment of a patient by electrical stimulation upon the detection of arousal from sleep in the patient comprising:
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(a) stimulation means for electrical stimulation of the patient; (b) monitoring means for monitoring a respiratory effort waveform of the patient for at least one parameter of the waveform indicating a body movement artifact; (c) comparison means associated with said monitoring means for comparing at least one value for the parameter with a predetermined limit to determine whether the patient is aroused; and (d) treatment adjusting means associated with said stimulation means, monitoring means and comparing means for reducing electrical stimulation to the patient upon detection of arousal.
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Specification