Method and apparatus for providing variable positive airway pressure
First Claim
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1. A system for delivering a flow of gas to an airway of a patient, the system comprising:
- a gas flow generating system that generates a flow of gas;
a patient circuit coupled to the gas flow generating system and adapted to communicate the flow of gas to an airway of a patient;
a sensor associated with the gas flow generating system or the patient circuit and adapted to measure a characteristic associated with the flow of gas within the patient circuit and to transmit a flow signal indicative thereof;
target value determining means for monitoring an effectiveness of the system in treating Cheyne-Stokes respiration of such a patient and for setting a target value based on the monitored effectiveness;
CSR monitoring means for determining whether such a patient'"'"'s respiratory activity is indicative of Cheyne-Stokes respiration by comparing the characteristic associated with the flow of gas with the target value; and
controlling means for controlling the gas flow generating system so as to cause the gas to be delivered at a sufficient pressure during at least a portion of a breathing cycle to treat Cheyne-Stokes respiration based on an output of the CRS monitoring means.
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Abstract
A method and apparatus for treating a breathing disorder and, more particularly, a method and apparatus for providing a pressurized air flow to an airway of a patient to treat congestive heart failure in combination with Cheyne-Stokes respiration and/or sleep apnea or other breathing disorders. A positive airway pressure ventilator is utilized in combination with an algorithm that adjusts IPAP and EPAP in order to counter a Cheyne-Stokes breathing pattern. Cheyne-Stokes respiration is detected by monitoring a peak flow of the patient.
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Citations
13 Claims
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1. A system for delivering a flow of gas to an airway of a patient, the system comprising:
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a gas flow generating system that generates a flow of gas; a patient circuit coupled to the gas flow generating system and adapted to communicate the flow of gas to an airway of a patient; a sensor associated with the gas flow generating system or the patient circuit and adapted to measure a characteristic associated with the flow of gas within the patient circuit and to transmit a flow signal indicative thereof; target value determining means for monitoring an effectiveness of the system in treating Cheyne-Stokes respiration of such a patient and for setting a target value based on the monitored effectiveness; CSR monitoring means for determining whether such a patient'"'"'s respiratory activity is indicative of Cheyne-Stokes respiration by comparing the characteristic associated with the flow of gas with the target value; and controlling means for controlling the gas flow generating system so as to cause the gas to be delivered at a sufficient pressure during at least a portion of a breathing cycle to treat Cheyne-Stokes respiration based on an output of the CRS monitoring means. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for delivering pressurized gas to an airway of a patient, the method comprising the steps of:
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delivering a flow of gas to the airway of the patient from a source of gas via a patient circuit; sensing a characteristic associated with a flow of gas within the patient circuit and outputting a flow signal; monitoring an effectiveness of the system in treating Cheyne-Stokes respiration of such a patient and setting a target value based on the monitored effectiveness; determining whether such a patient'"'"'s respiratory activity is indicative of Cheyne-Stokes respiration by comparing the characteristic associated with the flow of gas with the target value; and controlling the delivery of gas so as to cause the flow of gas to be delivered at a sufficient pressure during at least a portion of a breathing cycle to treat Cheyne-Stokes respiration based on a result of the determining step. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification