Dialysis machine and method of operating a dialysis machine

US6595944B2 · kind B2 · utility

Assignee

• Fresenius Medical Care Deutschland GmbH · DE

Inventors

• Klaus Balschat · Schweinfurt, DE
• Michael Koch · Biberist, CH
• Elmar Wolter · Bad Königshofen im Grabfeld, DE

Key dates

• Filing date: Jun 15, 2001
• Grant date: Jul 22, 2003
• Expiry date: Jun 15, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01F2101/2202
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A machine and method for preparing dialysis fluid for a dialysis machine. Fresh water is mixed with one or more dialysis fluid concentrates. The mixture of water and concentrates is conveyed into an equalizing chamber by a proportioning unit at a predetermined flow rate independent of the dialysate flow rate. Metered addition of the concentrates is performed volumetrically and is monitored on the basis of the conductivity of the dialysis fluid, which is measured by conductivity sensors. Because the mixture of water and concentrates is always conveyed at the same flow rate, the composition of the dialysis fluid can be determined with a high accuracy and the proportioning can be performed accurately.