METHOD AND APPARATUS FOR DETERMINING A RESPIRATION PARAMETER IN A MEDICAL DEVICE
First Claim
1. A method of determining a respiration parameter in a medical device, comprising:
- sensing pressure signals to generate corresponding sample points;
continuously adjusting a breath detection threshold in response to the generated sample points to generate a current adjusted breath detection threshold;
comparing a current generated sample point to the current adjusted breath detection threshold;
suspending the continuous adjusting of the breath detection threshold and setting the breath detection threshold equal to the most current adjusted breath detection threshold generated prior to the suspending;
comparing a next sample point, generated subsequent to the suspending, to the set breath detection threshold; and
determining the respiration parameter in response to the comparing of a next sample point to the set breath detection threshold.
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Abstract
A method of determining a respiration parameter in a medical device in which pressure signals are sensed to generate corresponding sample points, and a breath detection threshold is continuously adjusted in response to the generated sample points to generate a current adjusted breath detection threshold. A current generated sample point is compared to the current adjusted breath detection threshold, and the continuous adjusting of the breath detection threshold is suspended and the breath detection threshold is equal to the most current adjusted breath detection threshold generated prior to the suspending in response to the comparing. A next sample point, generated subsequent to the suspending, is compared to the set breath detection threshold, and the respiration parameter is determined in response to the comparing of a next sample point to the set breath detection threshold.
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Citations
19 Claims
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1. A method of determining a respiration parameter in a medical device, comprising:
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sensing pressure signals to generate corresponding sample points; continuously adjusting a breath detection threshold in response to the generated sample points to generate a current adjusted breath detection threshold; comparing a current generated sample point to the current adjusted breath detection threshold; suspending the continuous adjusting of the breath detection threshold and setting the breath detection threshold equal to the most current adjusted breath detection threshold generated prior to the suspending; comparing a next sample point, generated subsequent to the suspending, to the set breath detection threshold; and determining the respiration parameter in response to the comparing of a next sample point to the set breath detection threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of determining a respiration parameter in a medical device, comprising:
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sensing pressure signals to generate corresponding sample points; continuously adjusting a breath detection threshold in response to a minimum amplitude of a predetermined number of the generated sample points to generate a first detection threshold; determining whether a current generated sample point is less than the first inspiration detection threshold; suspending the continuous adjusting of the breath detection threshold and setting the first respiration detection threshold equal to the most current adjusted breath detection threshold generated prior to the suspending; determining whether a first predetermined number of next sample points, generated subsequent to the suspending, is less than the first respiration detection threshold; resuming the continuous adjusting of the breath detection threshold to continuously adjust the breath detection threshold in response to a maximum amplitude of the generated sample points to generate a second respiration detection threshold; determining whether a current generated sample point is greater than the second respiration detection threshold; suspending the continuous adjusting of the breath detection threshold and setting the expiration detection threshold equal to the most current adjusted breath detection threshold generated prior to the suspending; determining whether a second predetermined number of next sample points, generated subsequent to the suspending, is greater than the second respiration detection threshold; and determining the respiration parameter in response to the predetermined number of next sample points being greater than the second respiration detection threshold. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification