Cardio-respiratory control and monitoring system for determining CPAP pressure for apnea treatment
First Claim
1. A cardio-respiratory apparatus for monitoring physiological signs and controlling breathing air pressure of a person comprisingmonitoring means for gathering one or more types of physiological information from said person;
- means for sensing the pressure of the breathing air being supplied to said person;
recording means for recording said physiological information and said breathing air pressure;
base value control means determining a base value for said breathing air pressure based upon said physiological information;
air supply means for supplying breathing air at determined pressure levels relative to said base value;
air pressure control means for maintaining said air pressure at one of said pressure levels for a predetermined first time interval, increasing said air pressure at a first predetermined rate during a predetermined second time interval to another one of said pressure levels, repeating said process of maintaining and increasing air pressure for a predetermined number of times, and reducing said air pressure at a predetermined second rate during a predetermined third time interval to said base pressure level,said first, second and third time intervals constituting a control cycle of a predetermined fourth time interval; and
means for repeating said control cycle;
wherein said third time interval is at least five times smaller than the sum of said first time intervals plus the sum of said second time intervals.
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Accused Products
Abstract
A system and method for controlling and monitoring externally administered breathing air pressure in a series of cycles. During each cycle, the breathing air pressure starts at a base value and is slowly and progressively increased then rapidly reduced to the base value. If the control and monitoring system detects changes consistent with the presence of upper airway obstruction, the values of breathing air pressure for the next cycle are changed to a higher pressure range. A plurality of vital signs may be monitored and included in the breathing air pressure control system. Information obtained during this procedure is subsequently used to determine the most appropriate externally administered breathing airflow pressure for that person.
362 Citations
36 Claims
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1. A cardio-respiratory apparatus for monitoring physiological signs and controlling breathing air pressure of a person comprising
monitoring means for gathering one or more types of physiological information from said person; -
means for sensing the pressure of the breathing air being supplied to said person; recording means for recording said physiological information and said breathing air pressure; base value control means determining a base value for said breathing air pressure based upon said physiological information; air supply means for supplying breathing air at determined pressure levels relative to said base value; air pressure control means for maintaining said air pressure at one of said pressure levels for a predetermined first time interval, increasing said air pressure at a first predetermined rate during a predetermined second time interval to another one of said pressure levels, repeating said process of maintaining and increasing air pressure for a predetermined number of times, and reducing said air pressure at a predetermined second rate during a predetermined third time interval to said base pressure level, said first, second and third time intervals constituting a control cycle of a predetermined fourth time interval; and means for repeating said control cycle;
wherein said third time interval is at least five times smaller than the sum of said first time intervals plus the sum of said second time intervals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A cardio-respiratory monitoring and control method for monitoring physiological signs and controlling breathing air pressure of a person during repetitive control cycles, each said control cycle comprising the steps of
monitoring and recording said physiological signs and said breathing air pressure of said person; -
determining a base value for said breathing air pressure based upon said physiological information; cyclicly supplying breathing air at determined pressure levels relative to said base value, including the steps of; (a) maintaining said air pressure at one of said pressure levels for a predetermined first time interval, and (b) increasing said air pressure at a predetermined first rate during a predetermined second time interval to another one of said pressure levels, and repeating step (b) a predetermined number of times before reducing said air pressure at a predetermined second rate during a predetermined third time interval to the base pressure value pressure, thereby completing a control cycle of a duration equal to a predetermined fourth time interval; and repeating said control cycle;
wherein in each said control cycle the sum of each said first time interval plus the sum of each said second time intervals is at least five times longer than said third time interval. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification