Peristaltic Pump Tube

• US 20080188789A1
• Filed: 07/06/2005
• Published: 08/07/2008
• Est. Priority Date: 09/06/2004
• Status: Active Grant

• Current Assignee: Gambro Lundia AB (Baxter International Inc.)
• Original Assignee: Gambro Lundia AB (Baxter International Inc.)
• Inventors: Giannella, Carlo, Galavotti, Francesca
• Granted Patent: US 10,563,646 B2
• Time in Patent Office: Days
• US Class Current: 604/4.01
• CPC Class Codes: A61M 37/00 Other apparatus for introducing media into the body for reproduction or fertilisation A61B17/425; apparatus for iontophoresis or cataphoresis A61N1/30; Percutany, i.e. introducing medicines into the body by diffusion through the skin salt baths A61H33/04
• CPC Class Codes: B29C 48/793 upstream of the plasticising zone, e.g. heating in the hopper
• CPC Class Codes: B29C 48/832 Heating
• CPC Class Codes: F04B 43/0072 of tubular flexible members

Abstract

A tube for a peristaltic pump comprises an elastically deformable tubular body (2) made from a PVC composition containing: 100 phr of a PVC resin having a K value, measured according to standard ISO 1628-2, of not less than 85, from 40 to 100 phr of DEHA plasticizer, from 0.05 to 1.0 phr of lubricant, from 0.3 to 15.0 phr of stabilizer and co-stabilizer. The deformable tube, which is usefully employed for liquid transport in a dialysis apparatus, enables a high level of fluid transport efficiency to be maintained, even after many hours of peristaltic pump operation.

Claims

1-20. -20. (canceled)

21. A tube for a peristaltic pump, comprising an elastically deformable tubular body, made of a material containing at least a vinyl chloride resin and at least a plasticizer, wherein said resin has a K value of not less than 85 measured according to standard ISO 1628-2.

22. The tube of claim 21, wherein said material contains a quantity of said plasticizer which is not above 100 phr i.e. parts in weight per hundred parts of resin.

23. The tube of claim 21, wherein said material contains a quantity of said plasticizer which is above 40 phr.

24. The tube of claim 21, wherein said material contains a quantity of said plasticizer which is comprised between 50 and 80 phr.

25. The tube of claim 21, wherein said plasticizer is a monomer.

26. The tube of claim 21, wherein said plasticizer comprises a derivative of adipic acid.

27. The tube of claim 25, wherein said derivative is an alkyl ester.

28. The tube of claim 26, wherein said alkyl ester is DEHA.

29. The tube of claim 21, wherein said resin has a K value, measured in accordance with standard ISO 1628-2, which is not below 95.

30. The tube of claim 21, wherein said material contains:

100 phr of said PVC resin;

from 40 to 100 phr of said plasticizer;

from 0.05 to 1.0 phr of one or more lubricants;

from 0.3 to 15.0 phr of one of more stabilizers and co-stabilizers.

31. The tube of claim 21, wherein said tubular body is made entirely of a single layer of the material.

32. A set for fluid transport in an extracorporeal blood treatment, comprising at least one tract which is provided with a tube for a peristaltic pump according to claim 21.

33. An apparatus for extracorporeal blood treatment comprising at least a peristaltic pump and a set for fluid transport, the set being realized according to claim 32.

34. The apparatus of claim 33, predisposed to perform one or more of following treatments:

hemodialysis, hemofiltration, hemodiafiltration, pure ultrafiltration, therapeutic plasma exchange.

35. A blood line comprising at least a first end connector for connection to a patient, at least a second end connector for connection to a blood treatment device, and at least a tract provided with a tube for a peristaltic pump, wherein said tube is made according to claim 21.

36. A use of a tube, made according to claim 21, coupled with a peristaltic pump for fluid transport.

37. A use of a material for manufacturing a deformable tube to be used coupled with a peristaltic pump for fluid transport, which material reduces a drop in fluid flow rate following tube wear, said material containing at least a vinyl chloride resin and at least a plasticizer, wherein said resin has a K value of not less than 85 measured according to standard ISO 1628-2.

38. A use of a material containing:

100 phr of at least one vinyl chloride resin having a K value, measured in accordance with standard ISO 1628-2, of not less than 85; and

a quantity of less than 100 phr of at least a plasticizer comprising a derivative of adipic acid;

for manufacturing a deformable tube to be used coupled with a peristaltic pump for fluid transport, for limiting a drop of fluid flow rate of the peristaltic pump following wearing of the tube.

39. A process for manufacturing a deformable tube by extrusion, comprising stages of:

preparing a blend containing 100 phr of a vinyl chloride resin, and between 40 and 100 phr of at least a plasticizer, said resin having a K value, measured according to standard ISO 1628-2, of not less than 85;

heating the blend to a temperature comprised between 120°

C. and 150°

C.;

extruding the deformable tube from said blend at a temperature comprised between 160°

C. and 180°

C.

40. The process of claim 39, wherein said deformable tube is sterilized by irradiation with penetrating rays.