Flow rate control arrangement in an infusion device

Abstract

Abstract Throughput and total liquid quantity supplied are controlled using a predefined throughput demand and actual values derived from a drop detector. A controller governs the drop speed via a control element. The actual and demand values are both fed to two mutually independent microprocessors, at least one acting as the controller. The microprocessors exchange certain parameters via a data line. Each compares received parameters with internal values and instigates remedial measures if they differ by a defined amount, e.g. flow is stopped. Further functions, such as the demand value adjustment, are duplicated, one value being simply encoded and the other complementarily encoded.

Inventors

• 👤 Göran Cewers
• 👤 Sven-Gunnar Dipl.-Ing. Olsson

Bibliographic Details