Methods and systems for adaptive base flow

摘要

This disclosure describes systems and methods for providing novel adaptive base flow scheduling during ventilation of a patient to optimize the accuracy of estimated exhaled tidal volume. Further, this disclosure describes systems and methods for providing novel adaptive inspiratory trigger threshold scheduling during the novel adaptive base flow scheduling.

主权项

1. A method for improving an accuracy of estimating an exhalation volume while ventilating a patient with a ventilator, the ventilator comprising at least one processor and at least one memory, the method comprising:
determining, by the ventilator, an initial base flow to improve the accuracy of estimating the exhalation volume; determining, by the ventilator, an initial inspiration trigger threshold to prevent false triggering while base flow is changing; delivering the initial base flow during at least a first portion of exhalation while setting the inspiration trigger threshold to the initial inspiration trigger threshold; determining, by the ventilator, a desired base flow; determining, by the ventilator, a desired inspiration trigger threshold; increasing base flow from the initial base flow toward the desired base flow during at least a second portion of exhalation; decreasing the inspiration trigger threshold from the initial inspiration trigger threshold toward the desired inspiration trigger threshold while performing the step of increasing the base flow; and increasing a sensitivity to a patient initiated trigger during at least the second portion of exhalation while performing the steps of increasing the base flow and decreasing the inspiration trigger threshold.