VENTILATOR LEAK COMPENSATION
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Accused Products
Abstract
A ventilator including a pneumatic system for providing and receiving breathing gas, and a controller operatively coupled with the pneumatic system. The controller is operable to control circulation by the pneumatic system of breathing gas to and from a patient, and to adjust at least one of a volume and pressure of breathing gas delivered to the patient, such adjustment being based upon elastic properties of a component used to fluidly couple the pneumatic system to a patient.
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Citations
41 Claims
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1-21. -21. (canceled)
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22. A ventilator, comprising:
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a pneumatic system for providing and receiving breathing gas; a component for fluidly coupling the pneumatic system to a patient, wherein the component comprises a leak-susceptible orifice that varies in size during operation of the ventilator based on an applied pressure; and a controller operatively coupled with the pneumatic system, wherein the controller is configured to perform the following steps; control delivery of breathing gas to the patient, and adjust at least one of a volume and pressure of breathing gas delivered to the patient to account for leakage from the pneumatic system, the adjustment based at least in part on the varying size of the leak-susceptible orifice. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. A ventilator, comprising:
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a pneumatic system for circulating breathing gas to and from a patient; an airway including a patient interface and a breathing circuit for fluidly coupling the pneumatic system with a patient, wherein the airway comprises a leak-susceptible orifice that varies in size in direct relation to an applied pressure; and a controller operatively coupled with the pneumatic system, wherein the controller is configured to perform the following steps; control delivery of breathing gas to the patient; derive the varying size of the leak-susceptible orifice based on an elastic modulus of the airway and the applied pressure; and adjust the delivery of breathing gas based at least in part on the varying size of the leak-susceptible orifice. - View Dependent Claims (30, 31, 32)
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33. In a ventilator having a pneumatic system and an airway adapted to fluidly couple the pneumatic system to a patient, a leak compensation method, comprising:
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providing a baseline level of leak compensation based upon a size of a leak-susceptible orifice in the airway; deriving elastic properties of a component of the airway containing the leak-susceptible orifice based at least in part on material properties of the component; adjusting the baseline level of leak compensation in response to a pressure sufficient to cause deformation of the leak-susceptible orifice, wherein the deformation of the leak-susceptible orifice is based upon the elastic properties of the component and is directly related to the pressure, and wherein a magnitude of the adjustment is based at least in part on the elastic properties of the component. - View Dependent Claims (34, 35, 36, 37, 38, 39)
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40. A ventilator, comprising:
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a pneumatic system for providing and receiving breathing gas; an airway including a patient interface and a breathing circuit for fluidly coupling the pneumatic system with a patient; and a controller operatively coupled with the pneumatic system, where the controller is configured to perform the following steps; control a flow of breathing gas to the patient, and make dynamic adjustments in the flow of the breathing gas to compensate for a leak in the airway, where the dynamic adjustments are based at least in part on rigid leak properties of a fixed-size orifice of the airway and elastic leak properties of a variable-size orifice of the airway, and where the elastic leak properties of the variable-size orifice of the airway are directly related an applied pressure. - View Dependent Claims (41)
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Specification