Methods and systems for exhalation control and trajectory optimization
First Claim
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1. A method for controlling an exhalation phase during ventilation of a patient on a ventilator, the method comprising:
- determining with the ventilator a plurality of potential pressure profiles for an exhalation that will provide a faster rate of lung emptying for the exhalation than a previously provided rate based on at least one received criterion by the patient being ventilated on the ventilator;
selecting a pressure profile for delivery to the patient from the plurality of potential pressure profiles; and
controlling at least one of airway pressure and flow with the ventilator based on the selected pressure profile during the exhalation by the patient.
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Abstract
The systems and methods include controlling pressure and/or flow during exhalation. The systems and methods include novel exhalation for ventilating a patient. The systems and methods decrease the amount of time it takes the patient to passively expire an inspired volume of gas. For example, the systems and method may determine one or more pressure profiles based on one or more criterion and may select and utilize the pressure profile that provides for the fastest rate of lung emptying.
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Citations
21 Claims
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1. A method for controlling an exhalation phase during ventilation of a patient on a ventilator, the method comprising:
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determining with the ventilator a plurality of potential pressure profiles for an exhalation that will provide a faster rate of lung emptying for the exhalation than a previously provided rate based on at least one received criterion by the patient being ventilated on the ventilator; selecting a pressure profile for delivery to the patient from the plurality of potential pressure profiles; and controlling at least one of airway pressure and flow with the ventilator based on the selected pressure profile during the exhalation by the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for optimizing a pressure profile delivered to a patient during an exhalation phase on a ventilator, the method comprising:
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delivering at least one of airway pressure and flow based on the pressure profile during a current exhalation to the patient during ventilation on the ventilator; monitoring at least one parameter during the current exhalation by the patient; modifying the pressure profile for an exhalation to provide a faster rate of lung emptying during the exhalation than a previously provided rate based at least in part on the monitored at least one parameter to form a modified pressure profile; and delivering at least one of a modified airway pressure and a modified flow based on the modified pressure profile to the patient during at least one of the current exhalation and a next exhalation, wherein the modified pressure profile maintains a received PEEP. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A non-transitory computer-readable medium having a controller with computer-executable instructions executed by a processor of an exhalation module for controlling an exhalation phase during ventilation of a patient on a ventilator, the controller comprising:
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a pressure profile module that determines at least one potential pressure profile for an exhalation based on at least one received criterion to provide a faster rate of lunge emptying for the exhalation than a previously provided rate by the patient being ventilated on the ventilator and selects a pressure profile for delivery to the patient from the at least one potential pressure profile to provide a fastest rate of lung emptying; and a parameters module that repeatedly controls at least one of airway pressure and flow based on the selected pressure profile during the exhalation by the patient.
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Specification