System and method for providing a breathing gas
First Claim
1. A method of providing a breathing gas comprising:
- a) sensing a sensed parameter associated with delivery of the breathing gas;
b) changing a control parameter associated with a flow/pressure control element in response to a difference between the sensed parameter and a first predetermined sensed parameter value during an inhalation state of a breathing cycle;
c) determining a transition from the inhalation state to an exhalation state of the breathing cycle based at least in part on the changing control parameter;
d) changing the control parameter to cause a first change in the sensed parameter during an unload portion of the exhalation state based at least in part on the determined transition; and
e) changing the control parameter to cause a second change in the sensed parameter during a load portion of the exhalation state based at least in part on the first predetermined sensed parameter value.
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Accused Products
Abstract
Systems and methods for providing a breathing gas are provided. In one embodiment, the method includes sensing a sensed parameter associated with delivery of the breathing gas, changing a control parameter associated with a flow/pressure control element in response to a difference between the sensed parameter and a first predetermined sensed parameter value during a first portion of a breathing cycle, determining a transition from the first portion to a second portion of the breathing cycle based at least in part on the changing control parameter, changing the control parameter to cause a first change in the sensed parameter during the second portion of the breathing cycle based at least in part on the determined transition, and changing the control parameter to cause a second change in the sensed parameter during a third portion of the breathing cycle based at least in part on the first predetermined sensed parameter value.
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Citations
67 Claims
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1. A method of providing a breathing gas comprising:
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a) sensing a sensed parameter associated with delivery of the breathing gas; b) changing a control parameter associated with a flow/pressure control element in response to a difference between the sensed parameter and a first predetermined sensed parameter value during an inhalation state of a breathing cycle; c) determining a transition from the inhalation state to an exhalation state of the breathing cycle based at least in part on the changing control parameter; d) changing the control parameter to cause a first change in the sensed parameter during an unload portion of the exhalation state based at least in part on the determined transition; and e) changing the control parameter to cause a second change in the sensed parameter during a load portion of the exhalation state based at least in part on the first predetermined sensed parameter value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of providing a breathing gas comprising:
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a) sensing a breathing gas pressure associated with delivery of the breathing gas; b) detecting a start of an inhalation state of a breathing cycle; c) changing a valve step position associated with a variable position valve in response to a difference between the sensed breathing gas pressure and a first predetermined breathing gas pressure value during the inhalation state; d) determining a transition from the inhalation state to an exhalation state of the breathing cycle based at least in part on the changing valve step position; e) changing the valve step position to cause a first change in the breathing gas pressure during an unload portion of the exhalation state based at least in part on the determined transition; and f) changing the valve step position to cause a second change in the breathing gas pressure during a load portion of the exhalation state based at least in part on the first predetermined breathing gas pressure value. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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27. A method of providing a breathing gas comprising:
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a) sensing a breathing gas pressure associated with delivery of the breathing gas; b) determining a breath cycle time associated with at least a portion of a current inhalation state of a current breathing cycle and a portion of a previous breathing cycle; c) changing a valve step position associated with a variable position valve in response to a difference between the sensed breathing gas pressure and a first predetermined breathing gas pressure value during the current inhalation state; d) determining a transition from the current inhalation state to a current exhalation state of the current breathing cycle based at least in part on the changing valve step position; e) changing the valve step position to cause a first change in the breathing gas pressure during an unload portion of the current exhalation state based at least in part on the determined transition; and f) changing the valve step position to cause a second change in the breathing gas pressure during a load portion of the current exhalation state based at least in part on the first predetermined breathing gas pressure value. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35)
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36. A method of providing a breathing gas comprising:
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a) sensing a sensed parameter associated with delivery of the breathing gas; b) changing a control parameter associated with a flow/pressure control element in response to a difference between the sensed parameter and a first predetermined sensed parameter value during a first portion of a current breathing cycle; c) determining a transition from the first portion to a second portion of the current breathing cycle based at least in part on the changing control parameter; d) changing the control parameter to cause a first change in the sensed parameter during the second portion of the current breathing cycle based at least in part on the determined transition; and e) changing the control parameter to cause a second change in the sensed parameter during a third portion of the current breathing cycle based at least in part on the first predetermined sensed parameter value. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55)
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56. A method of providing a breathing gas comprising:
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a) sensing a breathing gas pressure associated with delivery of the breathing gas; b) changing a valve step position associated with a variable position valve in response to a difference between the sensed breathing gas pressure and a first predetermined breathing gas pressure value during a first portion of a current breathing cycle; c) determining a transition from the first portion to a second portion of the current breathing cycle based at least in part on the changing valve step position; d) changing the valve step position to cause a first change in the breathing gas pressure during the second portion of the current breathing cycle based at least in part on the determined transition; and e) changing the valve step position to cause a second change in the breathing gas pressure during a third portion of the current breathing cycle based at least in part on the first predetermined breathing gas pressure value. - View Dependent Claims (57, 58, 59, 60)
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61. A method of providing a breathing gas to a patient comprising:
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controlling a valve position to output a first target gas pressure level to the patient during at least a portion of the patient'"'"'s inhalation breathing state; monitoring an actual gas pressure level output to the patient; determining a valve position setting based on the monitored gas pressure level; determining a valve position setting threshold; determining at least a second target gas pressure level that is less than the first target gas pressure level; if the valve position setting falls below the valve position setting threshold, controlling the valve position to output the second target gas pressure level to the patient for a predetermined time period during at least a first portion of the patient'"'"'s exhalation breathing state; and controlling the valve position to output the first target gas pressure level to the patient after the predetermined time period has expired during at least a second portion of the patient'"'"'s exhalation breathing state. - View Dependent Claims (62, 63, 64, 65, 66, 67)
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Specification