Ventilator control system that generates, measures, compares, an

Details Ventilator control system that generates, measures, compares, an Ventilator control system that generates, measures, compares, an

1992-02-12

1993-12-21

Burr, Edgar S.

Surgery

Respiratory method or device

Means for supplying respiratory gas under positive pressure

12820422, 12820524, A61M 1600, A62B 700, A62B 902, F16K 3102

Patent

active

052713890

ABSTRACT:
The present invention provides a system and method for providing an improved correction to an input flow control signal to a flow control valve in a ventilator system. The correction as derived from a sum of the error in the flow rate actually delivered as compared with the desired flow rate for each control interval in a breath with the sum of past errors corresponding to control intervals in past breaths to generate a cumulative error signal for application in the control interval in a next breath. The cumulative error signal is stored as the sum of previous sustained errors arising periodically in the system for each control interval of previous breaths, and is integrated with the current error signal for each control interval to generate an integrated correction component signal. The input flow control signal is summed with the integrated correction component to generate a corrected command flow signal to the flow control valve.

REFERENCES:
patent: 3741208 (1973-06-01), Jonsson et al.
patent: 3961627 (1976-06-01), Ernst et al.
patent: 3972327 (1976-08-01), Ernst et al.
patent: 4281651 (1981-08-01), Cox
patent: 4345612 (1982-08-01), Koni et al.
patent: 4421113 (1983-12-01), Gedeon et al.
patent: 4971049 (1990-11-01), Rotariu et al.

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