Detection of periodic breathing during CPAP therapy
First Claim
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1. A breathing therapy device comprising:
- a blower;
a processor;
a flow sensing element, for sensing total flow of air andsaid processor configured to;
collect flow data from said flow sensing element;
analyze said flow data to detect patterns of periodic breathing in a user of said device;
rate the severity of said periodic breathing, wherein rating the severity of said periodic breathing comprises configuring said processor to;
calculate a power envelope of a normalized amplitude signal representing waxing and waning cycles of said patient flow data;
calculate a signal representing a zero crossing variance of said normalized amplitude signal; and
classify the severity of said periodic breathing using said power envelope of said normalized amplitude signal and said signal representing the zero crossing variance; and
alter therapy delivered to said user based on said rated severity of said periodic breathing.
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Abstract
An improvement to a breathing therapy machine to detect and rate occurrences of periodic breathing and to alter the therapy delivered to a user of the device based on the rating.
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Citations
10 Claims
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1. A breathing therapy device comprising:
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a blower; a processor; a flow sensing element, for sensing total flow of air and said processor configured to; collect flow data from said flow sensing element; analyze said flow data to detect patterns of periodic breathing in a user of said device; rate the severity of said periodic breathing, wherein rating the severity of said periodic breathing comprises configuring said processor to; calculate a power envelope of a normalized amplitude signal representing waxing and waning cycles of said patient flow data; calculate a signal representing a zero crossing variance of said normalized amplitude signal; and classify the severity of said periodic breathing using said power envelope of said normalized amplitude signal and said signal representing the zero crossing variance; and alter therapy delivered to said user based on said rated severity of said periodic breathing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification