Mechanical ventilation in the presence of sleep disordered breathing
First Claim
1. A method for treating sleep disordered breathing with a ventilatory device that delivers a supply of air to a patient at a positive pressure;
- said device including a controller, a blower, a patient interface, and a flow sensor;
comprising the steps of;
sensing leaks from the patient interface, the supply of air to the patient through the patient interface, and transitions between inspiration and expiration of the patient'"'"'s breathing cycle with said flow sensor;
detecting the pressure in the patient interface with said controller, determining with said controller the presence of a first event and a second event based upon detected information, the first and second events being different indications of sleep disordered breathing, the first event being an indication of obstructive sleep disordered breathing; and
setting with said controller a first pressure as a function of the occurrence of the first event and adjusted for any sensed leak indicative of mouth leak, and setting a second pressure as a function of the occurrence of the second event and the first pressure, the first pressure being provided during the expiratory phase of the patient'"'"'s breathing cycle and the second pressure being provided during the inspiratory phase of the patient'"'"'s breathing cycle.
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Accused Products
Abstract
A method for controlling operation of a CPAP apparatus. The apparatus has a blower, a patient interface, an air delivery conduit for delivering air from the blower to the patient interface, a sensor for determining the pressure in the patient interface, and a control mechanism that causes air to be delivered at a desired pressure to the patient interface and that detects transitions between inhalation and exhalation of a respiratory cycle of a patient in order to synchronize the blower output with the patient'"'"'s efforts. In one form the CPAP apparatus provides pressure in accordance with a bi-level waveform with at least one characterizing parameter of the waveform being automatically adjusted in accordance with indications of sleep disordered breathing. The indications of sleep disordered breathing can be one or more of snoring, apnea, hypopnea, and flow limitation.
22 Citations
34 Claims
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1. A method for treating sleep disordered breathing with a ventilatory device that delivers a supply of air to a patient at a positive pressure;
- said device including a controller, a blower, a patient interface, and a flow sensor;
comprising the steps of;sensing leaks from the patient interface, the supply of air to the patient through the patient interface, and transitions between inspiration and expiration of the patient'"'"'s breathing cycle with said flow sensor; detecting the pressure in the patient interface with said controller, determining with said controller the presence of a first event and a second event based upon detected information, the first and second events being different indications of sleep disordered breathing, the first event being an indication of obstructive sleep disordered breathing; and setting with said controller a first pressure as a function of the occurrence of the first event and adjusted for any sensed leak indicative of mouth leak, and setting a second pressure as a function of the occurrence of the second event and the first pressure, the first pressure being provided during the expiratory phase of the patient'"'"'s breathing cycle and the second pressure being provided during the inspiratory phase of the patient'"'"'s breathing cycle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 31, 32)
- said device including a controller, a blower, a patient interface, and a flow sensor;
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16. An apparatus adapted for treatment of sleep disordered breathing comprising:
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a blower for providing to a patient a supply of air at a positive treatment pressure in phase with the patient'"'"'s respiratory breathing cycle, the respiratory breathing cycle including an expiratory phase and an inspiratory phase; a patient interface, an air delivery conduit for delivering air from the blower to the patient interface; and a controller for detecting the pressure in the patient interface, leaks from the patient interface, the supply of air to the patient through the patient interface, and transitions between inspiration and expiration of the patient'"'"'s breathing cycle, said controller further determining the presence of a first event and a second event based upon detected information, the first and second events being different indications of sleep disordered breathing, the first event being an indication of obstructive sleep disordered breathing, and setting a first pressure as a function of the occurrence of the first event and adjusted for any sensed leak indicative of mouth leak, and setting a second pressure as a function of the occurrence of the second event and the first pressure, the first pressure being provided during the expiratory phase of the patient'"'"'s breathing cycle and the second pressure being provided during the inspiratory phase of the patient'"'"'s breathing cycle. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 33, 34)
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Specification