Dosing device for controlled injection of liquid from a reservoi

Details Dosing device for controlled injection of liquid from a reservoi Dosing device for controlled injection of liquid from a reservoi

1988-11-23

1991-01-15

Rosenbaum, C. Fred

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604152, A61M 520

Patent

active

049850156

ABSTRACT:
A dosing device of the type which can be implanted in a patient to control injection of liquids from a reservoir into the patient has an electrically controllable piston pump and a circuit responsible for controlling and monitoring the operation of the pump. The circuit includes a unit for acquiring a chronological curve representative of the piston motion, and electrical signals proportional thereto are obtained. These signals are supplied to control elements which compare these signals to prescribed rated values, and generate control and alarm signals given deviations of the incoming signals from the rated values.

REFERENCES:
patent: 4024864 (1977-05-01), Davies et al.
patent: 4209014 (1980-06-01), Sefton
patent: 4395259 (1983-07-01), Prestele et al.
patent: 4486190 (1984-12-01), Reinicke
patent: 4494950 (1985-01-01), Fischell
patent: 4561443 (1985-12-01), Hogrefe et al.
patent: 4808089 (1989-02-01), Buchholtz et al.
patent: 4871351 (1989-10-01), Feingold

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