Patent ID: 6158433
Filing Date: 2000-12-12
Classification: A61M

Abstract:
A software driven ventilator system comprising:a ventilator system controlled bv a hardware controller, wherein said ventilator system contains a positive-pressure respirator displacing air controlled by an exhalation solenoid activated by said controller;said controller implemented as a finite state machine in software;said software implementing said finite state machine controller has a plurality of states for controlling said ventilator system, comprising:a first weaning state, the Cmode, wherein a patient is allowed to breath naturally, with the controller monitoring the patient's breathing, and activating said ventilation system, as a backup to the patient's natural breathing, in the event of apnea;a second Assist/Control state, the AC.sub.-- EX mode, wherein a patient is forced respiratory gas by activation of said exhalation solenoid at a predetermined time cycle; and,a third synchronous assist state, the SIMV.sub.-- WDW mode, wherein a patient is forced respiratory gas for inhalation by activation of said exhalation solenoid at a predetermined time cycle, and said controller monitoring the patient for natural breathing.