SYSTEMS AND METHODS FOR TRIGGERING AND CYCLING A VENTILATOR BASED ON RECONSTRUCTED PATIENT EFFORT SIGNAL
First Claim
1. A method for respiratory support, the method comprising:
- providing a measured pressure;
calculating a net flow based on at least one measured inlet flow and at least one measured outlet flow;
using a relationship between a first value related to the measured pressure, a second value related to the measured net flow and a third value related to patient effort to provide a prediction of patient effort;
updating an interim value based at least in part on the prediction of patient effort;
calculating a computed patient effort based at least in part on the interim value; and
utilizing the computed patient effort to trigger a ventilation cycle.
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Accused Products
Abstract
Various embodiments of the present disclosure provide systems, methods and devices for respiratory support. As one example, a method for respiratory support is described that includes providing a measured pressure, and calculating a net flow based on at least one measured inlet flow and measured outlet flow. A relationship between a first value related to the measured pressure, a second value related to the measured net flow and a third value related to patient effort is used to provide a prediction of patient effort. An interim value is updated based at least in part on the prediction of the patient effort, and used to help compute a patient effort. A ventilation cycle is initiated using the computed patient effort.
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Citations
22 Claims
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1. A method for respiratory support, the method comprising:
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providing a measured pressure; calculating a net flow based on at least one measured inlet flow and at least one measured outlet flow; using a relationship between a first value related to the measured pressure, a second value related to the measured net flow and a third value related to patient effort to provide a prediction of patient effort; updating an interim value based at least in part on the prediction of patient effort; calculating a computed patient effort based at least in part on the interim value; and utilizing the computed patient effort to trigger a ventilation cycle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A ventilation system, the ventilation system comprising:
a processor communicably coupled to a computer readable medium, wherein the computer readable medium includes instructions executable by the processor to; receive a pressure; receive at least one of an inlet flow and an outlet flow; use a relationship between a first value related to the pressure, a second value related to the received flow, and a third value related to patient effort to calculate a prediction of patient effort; update an interim value based at least in part on the prediction of patient effort; calculate a computed patient effort based at least in part on the interim value; and initiate a ventilation cycle based at least in part on the computed patient effort. - View Dependent Claims (16, 17, 18, 19)
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20. A patient ventilator, the ventilator comprising:
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a gas inlet; a gas outlet; a tube coupling the gas inlet and the gas outlet; a pressure sensor, wherein the pressure sensor is operable to provide a measured pressure value indicating a pressure in the tube; a first flow sensor, wherein the first flow sensor is operable to provide an inlet flow value indicating a flow associated with the gas inlet; a second flow sensor, wherein the second flow sensor is operable to provide an outlet flow value indicating a flow associated with the gas outlet; and a processor communicably coupled to a computer readable medium, wherein the computer readable medium includes instructions executable by the processor to; receive the measured pressure value; receive the inlet flow value; receive the outlet flow value; calculate a net flow based at least in part on the inlet flow value and the outlet flow value; use a relationship between a first value related to the measured pressure a second value related to the net flow and a third value related to patient effort to provide a prediction of patient effort; update an interim value based at least in part on the prediction of patient effort; calculate a computed patient effort based at least in part on the interim value; and initiate a ventilation cycle based at least in part on the computed patient effort. - View Dependent Claims (21, 22)
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Specification