DIALYSIS LIQUID MONITORING AND GENERATING ASSEMBLY

• US 3,744,636 A
• Filed: 01/05/1972
• Issued: 07/10/1973
• Est. Priority Date: 01/06/1971
• Status: Expired due to Term

• Current Assignee: Roger Commarmot
• Original Assignee: Roger Commarmot
• Inventors: Commarmot, Roger
• Primary Examiner(s): Spear, Jr., Frank A.
• Application Number:
  US05/215,602
• Time in Patent Office: 552 Days
• Field of Search: 210/22,180,321
• US Class Current: 210/180
• CPC Class Codes: A61M 1/1656 Apparatus for preparing dialysates
• CPC Class Codes: A61M 1/1662 with heat exchange between fresh and used dialysate
• CPC Class Codes: A61M 1/1668 Details of containers
• CPC Class Codes: A61M 1/1686 by heat

Abstract

Apparatus for generating and controlling the supply of dialysis liquid to a haemodialyzer comprises sources of dialysis liquid concentrate and water and a metering vessel for each, a mixing tank and a storage tank interconnected by flexible pipelines with valves and pinching devices. A heating vessel is between the storage tank and the haemodialyzer and a gas-bubble line runs from the top of the heating vessel direct to the pump by-passing the dialyzer. A part of the system including a temporary storage buffer tank may be formed into a smaller circuit for sterilization purposes.

Claims

1. A dialysis liquid monitoring and generating assembly for supplying dialysis liquid to at least one haemodialyser, said assembly comprising a first flexible pipeline for connection to a source of water, a second flexible pipeline for connection to a source of dialysis liquid concentrate, a vessel fed by said first pipeline for metering said water, a vessel fed by said second pipeline for metering said dialysis liquid concentrate, means for detecting the levels of the liquids in each of said metering vessels, a mixing tank, a storage tank, third and fourth flexible pipelines respectively connecting said metering vessels to said mixing tank, and a fifth flexible pipeline connecting said mixing tank to said storage tank, said metering vessels, said mixing tank and said storage tank being arranged for gravitational flow of liquid from the metering vessel to the mixing tank and from the mixing tank to the storage tank, a valve for controlling liquid flow through each of said first and second flexible pipelines, pinching means for pinching each of said first and second flexible pipelines, pinching means for pinching each of said third and fourth flexible pipelines, means for pinching said fifth pipeline and a single motor connected with all said pinching means for simultaneously actuating said pinching means.

2. An assembly according to claim 1, further comprising a downstream end to each of said third and fourth flexible pipelines, each of said downstream ends being within the mixing tank, wherein the downstream end of said fourth flexible pipeline between the dialysis liquid concentrate metering vessel and the mixing tank is within said third flexible pipeline between the water metering vessel and the mixing tank.

3. An assembly according to claim 1, further comprising a heating vessel for the dialysis liquid, said heating vessel being arranged in the assembly downstream of said storage tank;

a haemodialyser downstream of said heating vessel;

a suction pump downstream of said dialyzer, said suction pump having an inlet port; and

a pipeline running from the top of said heating vessel to said inlet port of the suction pump, whereby gases formed in the heating vessel are removed from the dialysis liquid before the latter reaches the haemodialyser.

4. An assembly according to claim 3 further comprising means for selectively bypassing the haemodialyser to form at least part of the remainder of the circuit including the heating vessel into a closed circuit, whereby sterilisation of that part of the circuit may be performed.

5. An assembly according to claim 4 wherein said closed circuit includes a temporary storage tank.

6. An assembly according to claim 4, wherein said heating vessel is operable to raise the temperature of the liquid in said closed circuit for sterilisation to a temperature in the region of 90* to 100*C.