Breathing gas delivery method and apparatus
First Claim
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1. A method of detecting changes in the respiratory state of a patient between inspiration and expiration comprising the steps of:
- monitoring the respiratory gas flow of such a patient;
from said monitoring, determining a patient respiratory gas flow characteristic at selected time intervals to provide a plurality of said gas flow characteristics displaced in time from one another;
identifying selected pairs of said respiratory gas flow characteristics from said plurality;
comparing said selected pairs of said respiratory gas flow characteristics; and
from said comparing, identifying changes in the patient'"'"'s respiratory state between inspiration and expiration.
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Abstract
An improved methodology and systems for delivery of breathing gas such as for the treatment of obstructive sleep apnea through application of alternating high and low level positive airway pressure within the airway of the patient with the high and low airway pressure being coordinated with the spontaneous respiration of the patient, and improved methods and apparatus for triggering and for leak management in such systems.
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11 Claims
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1. A method of detecting changes in the respiratory state of a patient between inspiration and expiration comprising the steps of:
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monitoring the respiratory gas flow of such a patient; from said monitoring, determining a patient respiratory gas flow characteristic at selected time intervals to provide a plurality of said gas flow characteristics displaced in time from one another; identifying selected pairs of said respiratory gas flow characteristics from said plurality; comparing said selected pairs of said respiratory gas flow characteristics; and from said comparing, identifying changes in the patient'"'"'s respiratory state between inspiration and expiration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification