Author(s)

C. Brighenti, G. Gnudi & S. Severi

Abstract

Estimation of respiratory parameters during mechanical ventilation: a simple method taking account of tubing compliance C. Brighenti, G. Gnudi & S.Severi Department of Electronics, Computer Science and Systems (DEIS), University of Bologna, Italy Abstract A lumped parameter non linear model of a typical ventilator-patient circuit was used to simulate flow and pressure signals in a wide variety of respiratory disorders. Patient lungs were described by the series connection of a compliance (Cl = constant) and a resistance proportional to the airflow (Kl = proportionality constant). Aim of this work is to present an estimation algorithm which allows to reduce the error on the estimate of the patient respiratory parameters when uslng pressure and flow signals at the ventilator side instead of the patient side. The proposed algorithm is based on a simplified model of the ventilator-patient circuit, which incorporates the tubing compliance (C,,,he) and neglects the pressure losses along the tubes du

Keywords