Verfahren und Systeme zur Steuerung der Durchflussrate in einer Pneumatischen Spritze

Details

Veröffentlichungs-Nr.

EP3669908

Aktenzeichen

EP19210245

Anmeldetag

20. November 2019

Veröffentlichung

21. Januar 2026

Erteilung

21. Januar 2026

Rechtsraum

EP

IPC

A61M1/02A61M1/36A61M5/155A61M5/145

Abstract

A method for controlling the flow rate of a pneumatic syringe in a system that includes a disposable fluid circuit and reusable hardware configured to accept the disposable fluid circuit. The disposable fluid circuit includes one or more syringes, while the reusable hardware includes a syringe pump for each syringe of the disposable fluid circuit and a controller. The syringe pump includes a vacuum/pressure source for moving the piston within the syringe and a position detector for indicating the position of the piston within the syringe. The method controls several distinct phases of the process: break pressure targeting, glide control and vent control, and the method is the same regardless of whether a positive pressure or a vacuum is applied to the piston of the syringe. Preferably, a proportional-integral-derivative ("PID") feedback loop is used for controlling the movement of the piston in the syringe.

Anmelder

Firma

Fenwal, Inc.

Land

🇺🇸 USA

Fachgebiete