Patent ID: 6820620
Filing Date: 2004-11-23
Classification: A61M

Abstract:
A method of regulating pressure in open-loop mode for a respiratory assistance apparatus having a compression chamber which is divided into two compartments, each compartment being connected to an air or respiratory gas intake and to a compressed air outlet by a resilient floating membrane, this floating membrane is exclusively guided by fastening its periphery to the wall of the said chamber, a driving coil is fastened to the center of said floating membrane, this driving coil is placed in a gap which is oriented in the direction in which said floating membrane is deformed, the instantaneous flow rate of air exiting by said outlet is measured and said driving coil is supplied by continuously calculating the instantaneous intensity and the direction of the supply current as a function of the reference pressure of the insufflated air, said instantaneous flow rate and the constants of said apparatus.