Portable machine for regenerative dialysis

• US 4,180,460 A
• Filed: 12/11/1978
• Issued: 12/25/1979
• Est. Priority Date: 01/20/1978
• Status: Expired due to Term

• Current Assignee: Bellco SRL (Medtronic Plc)
• Original Assignee: Bellco SRL (Medtronic Plc)
• Inventors: Calari, Alessandro
• Primary Examiner(s): Hart, Charles N.
• Assistant Examiner(s): Sadowski, David R.
• Application Number:
  US05/968,586
• Time in Patent Office: 379 Days
• Field of Search: 210/321 A, 210/321 B, 210/27, 210/175, 210/181, 210/184, 210/186, 210/195 R, 210/196, 210/182, 210/253, 210/257 M, 210/258, 210/259, 210/266, 210/295, 210/24 R , 210/34, 210/40, 210/74, 210/433 M, 210/434, 210/167, 210/85, 219/300, 219/308, 219/328, 219/331, 219/497, 237/8 A, 73/1 F, 73/343 B, 128/DIG. 3
• US Class Current: 210/182
• CPC Class Codes: A61M 1/1656 Apparatus for preparing dialysates
• CPC Class Codes: A61M 1/166 Heating for sterilisation A61M1/1686
• CPC Class Codes: A61M 1/1664 with temperature control
• CPC Class Codes: A61M 1/1668 Details of containers
• CPC Class Codes: A61M 1/1696 with dialysate regeneration
• CPC Class Codes: Y10S 210/929 Hemoultrafiltrate volume measurement or control processes

Abstract

A portable machine for regenerative dialysis comprises a dialyzing liquid reservoir in which is immersed a suction duct connected to a heating tube the temperature of which is controlled by a thermal probe pair piloting a temperature adjusting element. The outlet of the heating tube is connected to the suction side of a dialyzing liquid pump having a first and second delivery ducts opening in the dialyzing liquid reservoir wherein are interposed a dialyzer element and a dialyzing liquid regenerating cartridge respectively.

Claims

1. A portable machine for regenerative dialysis, characterized in that it comprises a reservoir for the dialyzing liquid, a suction duct immersed in said reservoir, a heating element connected to said suction duct, a first element sensing the temperature of the dialyzing liquid interposed between said suction duct and said heating element, a pump with the suction side thereof connected to said heating element, a second element sensing the temperature of the dialyzing liquid interposed between said pump and said heating element, a first and second delivery ducts of said pump opening into said reservoir, a dialyzer element interposed in said first delivery duct, a dialyzing liquid regenerating cartridge interposed in said second delivery duct, a first and second thermal probes respectively associated with said first and second temperature sensing elements, and a temperature adjusting member controlling said heating element and driven by said first and second thermal probes.

2. A portable machine for regenerative dialysis, according to the preceding claim, characterized in that it comprises a preset temperature setting assembly interconnected with said temperature adjusting member.

3. A portable machine for regenerative dialysis, according to claim 1, characterized in that said heating element comprises a transformer and a heating tube serially connected to the secondary of said transformer and made of a non-toxic electrically conductive material wherethrough said dialyzing liquid flows, said temperature adjusting member being located on the primary of said transformer.

4. A portable machine for regenerative dialysis, according to claim 1, characterized in that said first and second sensing elements comprise respectively a substantially cylindrical cell having at one base an inlet port and outlet port diametrically opposite each other, said inlet port being at a lower level than said outlet port, at the opposite base said cell being provided with an outwardly open cylindrical cavity adapted for accomodating said thermal probes.

5. A portable machine for regenerative dialysis, according to claim 1, characterized in that it comprises on said first delivery duct a bifurcation including a first branch, on which is interposed said dialyzer element, and a second branch bypassing said dialyzer element, an electric clamp adapted for closing either said first or said second branch to control said bifurcation.

6. A portable machine for regenerative dialysis, according to claim 5, characterized in that it comprises a control assembly controlling said electric clamp, a temperature range outside whereof said electric clamp closes said first branch leaving said second branch open being presettable in said control assembly, in said temperature range said electric clamp being operative to close said second branch and leave said first branch open, a third thermal probe, accomodated within the cylindrical cavity of said second temperature sensing element driving said control assembly.

7. A portable machine for regenerative dialysis, according to claim 4, characterized in that said heating tube of said heating element has a substantially V-like shape and has at the end an inlet port and outlet port, said heating tube extending in a substantially vertical plane, said inlet port being at a lower level than said outlet port, said tube defining inside it a uniformly rising path.

8. A portable machine for regenerative dialysis, according to claim 1, characterized in that all of the elements wherethrough the dialyzing fluid flows are of the "throw-away" type.