Method and apparatus for premixing dialysate

US10729836B2 · kind B2 · utility

Assignee

• B. Braun Avitum AG · DE

Inventors

• Grzegorz Golaszewski · Kassel, DE
• Andre Wagner · Sinsheim, DE

Key dates

• Filing date: Sep 13, 2017
• Grant date: Aug 4, 2020
• Expiry date: Feb 14, 2039

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01F2101/2202
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

An apparatus for premixing fluids to form dialysate for an extracorporeal blood treatment includes at least a first feed portion for supplying at least a first fluid from at least a first fluid reservoir, at least a second feed portion for supplying at least a second fluid from at least a second fluid reservoir, a premixing portion being configured to premix fluids supplied via the feed portions in counter flow to form a fluid mixture and at least one drain portion for draining the fluid mixture premixed in the premixing portion as dialysate. A method carries out appropriate steps. In a conductivity measurement along the drain portion the conductivity of the premixed fluid mixture is measured by means of a digital filter adapted to be parameterized based on at least two state variables of the premixing process at least in two phases with a first predictive phase and a second corrective phase.