Method and system for patient airway flow 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 an estimated gas flow (830); (ii) determining a proximal pressure error value (840). (Iii) compensating the determined proximal pressure estimation error value (850); (iv) compensating for an error in the estimated gas flow rate (854); (v) determining the estimated gas flow leak; (Vi) monitoring leaks between breaths (860); (vii) determining gas flow leak rate (870); (viii) adjusting estimated gas flow leaks (880); (ix) detecting a bias to the estimation of airway flow (872); (x) determining that the system is in a resting state of respiration. (Xi) Eliminate the estimated gas flow bias to bring the bias closer to zero (976); and (xii) Suspend the bias correction between breaths immediately after breathing (878) ;including.