Patent ID: 7918223

Claim:
A circuit compliance compensated pressure regulated volume control system in a patient respiratory ventilation system, comprising: a circuit compliance estimator, to provide a relationship between a circuit volume V cc and a differential pressure ΔP Y between a circuit pressure P Y and a positive end expiratory pressure (PEEP) for a patient circuit used in the ventilation system; a circuit volume estimator, operative to estimate a circuit volume VOL CKT — EST distributed to the patient circuit based on the relationship provided by the circuit compliance estimator; a patient volume observer, operative to provide an estimated patient volume VOL TID — EST by subtracting the estimated circuit volume from a measured machine delivered net volume VOL NET ; and a pressure-regulated volume controller, operative to update a peak airway pressure P SET based on the estimated patient volume VOL TID — EST and a set tidal volume VOL TID — SET .