MECHANICAL VENTILATION IN THE PRESENCE OF SLEEP DISORDERED BREATHING
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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 synchronise 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 characterising 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.
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Citations
60 Claims
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1-30. -30. (canceled)
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31. A method for treating sleep disordered breathing with a ventilatory device;
- 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 flow 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; and
setting with said controller a first pressure as a function of the occurrence of the first event and adjusted for any leak, and setting a second pressure as a function of the occurrence of the second event and adjusted for any leak, the first pressure being used to determine the treatment pressure provided during the expiratory phase of the patient'"'"'s breathing cycle and the second pressure being used to determine the treatment pressure provided during the inspiratory phase of the patient'"'"'s breathing cycle. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45)
- said device including a controller, a blower, a patient interface, and a flow sensor;
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46. An apparatus adapted for treatment of sleep disordered breathing comprising:
- a blower for providing to a patient a supply of air at a 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 flow 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; and
setting a first pressure as a function of the occurrence of the first event and adjusted for any leak, and setting a second pressure as a function of the occurrence of the second event and adjusted for any leak, the first pressure being used to determine the treatment pressure provided during the expiratory phase of the patient'"'"'s breathing cycle and the second pressure being used to determine the treatment pressure provided during the inspiratory phase of the patient'"'"'s breathing cycle. - View Dependent Claims (47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60)
- a blower for providing to a patient a supply of air at a treatment pressure in phase with the patient'"'"'s respiratory breathing cycle, the respiratory breathing cycle including an expiratory phase and an inspiratory phase;
Specification