Patent ID: 6192885
Filing Date: 2001-02-27
Classification: A61M,H04Q

Abstract:
A method for controlling an expiratory valve in a ventilator during expiration, said expiratory valve being disposed in an expiratory section of the ventilator, comprising the steps of:substantially completely opening said expiratory valve for a first interval, having a duration, in a first expiration;during a second interval following said first interval in said first expiration, measuring pressure in said expiratory section of said ventilator;during said second interval, controlling said expiratory valve to produce a predetermined end pressure in said expiratory section;identifying at least one parameter related to controlling said expiratory valve in said second interval; andin said second interval, determining from said parameter whether a duration of a first interval in a next-following, second expiration relative to the duration of said first interval in said first expiration.