METHOD AND APPARATUS FOR DETERMINING RESPIRATORY EFFORT IN A MEDICAL DEVICE
First Claim
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1. A method of determining respiratory effort in a medical device, comprising:
- sensing pressure signals to generate corresponding sample points;
detecting an inspiration in response to the sensed pressure signals;
detecting an expiration in response to the sensed pressure signals;
detecting a breath in response to the detected inspiration and the detected expiration; and
determining the respiratory effort in response to the detected breath.
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Abstract
A method of determining respiratory effort in a medical device in which pressure signals are sensed to generate corresponding sample points, an inspiration and an expiration are detected in response to the sensed pressure signals, a breath is detected in response to the detected inspiration and the detected expiration, and the respiratory effort is determined in response to the detected breath.
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Citations
20 Claims
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1. A method of determining respiratory effort in a medical device, comprising:
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sensing pressure signals to generate corresponding sample points; detecting an inspiration in response to the sensed pressure signals; detecting an expiration in response to the sensed pressure signals; detecting a breath in response to the detected inspiration and the detected expiration; and determining the respiratory effort in response to the detected breath. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of determining respiratory effort in a medical device, comprising:
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sensing cardiac pressure signals; sensing cardiac signals and determining a heart rate in response to the sensed cardiac signals; filtering the sensed pressure signals in response to the determined heart rate to generate a heart-rate dependent frequency response; deriving a filtered signal in response to the heart rate dependent frequency response; generating sample points in response to the derived filtered signal; detecting an inspiration in response to a first predetermined number of sample points corresponding to the sensed pressure signals being less than a detection threshold; detecting an expiration in response to a second predetermined number of sample points corresponding to the sensed pressure signals, occurring subsequent to the first predetermined number of sample points, being greater than the detection threshold; detecting a breath in response to the detected inspiration and the detected expiration; and determining the respiratory effort in response to the detected breath. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification