METHODS AND SYSTEMS FOR PATIENT AIRWAY AND LEAK FLOW ESTIMATION FOR NON-INVASIVE VENTILATION

摘要

A method (800) for estimating patient airway flow in a non-invasive ventilator system includes: (i) determining (830) an estimated gas flow; (ii) determining (840) a proximal pressure error value; (iii) compensating (850) for the determined proximal pressure estimate error value; (iv) compensating (854) for an error in the estimated gas flow; (v) determining (856) an estimated gas flow leak; (vi) monitoring (860) on a breath to breath basis for a leak; (vii) determining (870) a gas flow leak factor; (viii) adjusting (880) the estimated gas flow leak; (ix) detecting (872) a bias on the airway flow estimate; (x) determining (874) that the system is within a quiescent state of a breath; (xi) de -biasing (976) the estimated gas flow to drive the bias to near zero; and (xii) suspending (878) breath to breath bias correction on an immediately subsequent breath.