Dialysis machine control

Abstract

A method of preparing a dialysate solution for hemodialysis, the method including the steps of providing a mixing pump comprising a pump chamber covered by an actuable membrane, the chamber having a first inlet for admitting water into the chamber, a second inlet for admitting dialysate base solution into the chamber, and an outlet from the chamber, the method including the further steps of providing pump means for dispensing a predetermined volume of dialysate solution base into the chamber at a first pressure, actuating the membrane to draw a volume of water or water mix into the mixing pump chamber at a second pressure, wherein the magnitude of the first pressure is higher than the magnitude of the second pressure so as to ensure the complete dispense of the dialysate solution base into the chamber.

Description

technical field [0001] The present invention relates to dialysis machines and in particular, but not exclusively, to a method of preparing dialysate for use in dialysis. Background technique [0002] Dialysis is a treatment that replaces kidney function to remove excess fluid and waste products, such as potassium and urea, from the blood. This therapy is used when kidney function deteriorates to the point where uremic syndrome poses a threat to the body's physiology (acute renal failure), or when prolonged kidney conditions impair kidney performance (chronic renal failure). [0003] There are two main types of dialysis, hemodialysis and peritoneal dialysis. [0004] In peritoneal dialysis therapy, dialysate is passed through a tube into the abdominal cavity. The fluid stays in the abdominal cavity for a while to absorb waste, which is then removed through the tube. [0005] Typically, patients in the early stages of long-term renal condition are treated with peritoneal di...

AI Technical Summary

Problems solved by technology

[0015] Another problem with known hemodialysis machines is that the blood and dialysate lines need to be carefully fitted to the dialysis machine before treatment begins

[0017] The problems associated with conventional dialysis equipment are somewhat alleviated by the system disclosed in WO2006 / 120415, which discloses a cassette-based system for directing hemodialysis, however this application proposes a Methods and systems for mixing dialysate are complex and expensive, involving large cassettes with multiple reservoirs, each with level control, thus requiring complex pump and control systems

This complexity and this space requirement is undesirable in portable dialysis machines such as those suitable for home dialysis

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