Peristaltic pump tube

Patent metadata

Field	Value
Publication number	US-11060516-B2
Application number	US-202016791727-A
Country	US
Kind code	B2
Filing date	Feb 14, 2020
Priority date	Sep 6, 2004
Publication date	Jul 13, 2021
Grant date	Jul 13, 2021

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.

First claim

The invention claimed is:

1. A tube for a peristaltic pump, comprising:
an elastically deformable tubular body, the tubular body made from a material containing a blend of at least:
(i) a vinyl chloride resin having a K value of not less than 85 and no more than 105 measured according to standard ISO 1628-2; and
(ii) a plasticizer comprising an ester of adipic acid;

the tubular body being made entirely of a single layer of the material.

2. The tube of claim 1 , wherein the material contains not above 100 phr of the plasticizer, wherein phr means parts by weight per hundred parts by weight of resin.

3. The tube of claim 1 , wherein the material contains above 40 phr of the plasticizer.

4. The tube of claim 1 , wherein the material contains between 40 and 100 phr of the plasticizer.

5. The tube of claim 1 , wherein the material contains between 50 and 80 phr of the plasticizer.

6. The tube of claim 1 , wherein the ester of adipic acid is an alkyl ester.

7. The tube of claim 6 , wherein the alkyl ester is DEHA.

8. The tube of claim 1 , wherein the vinyl chloride resin has a K value of not less than 95.

9. The tube of claim 1 , wherein the vinyl chloride resin has a K value of between 97 and 105.

10. The tube of claim 1 , wherein the vinyl chloride resin has a K value of more than 100 and no more than 105.

11. The tube of claim 1 , wherein the material contains: 100 phr of the vinyl chloride resin; from 40 to 100 phr of the plasticizer; from 0.05 to 1.0 phr of one or more lubricants; and from 0.3 to 15.0 phr of one or more stabilizers and co-stabilizers.

12. 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 1 .

13. An apparatus for extracorporeal blood treatment comprising at least a peristaltic pump and the set for fluid transport according to claim 12 .

14. The apparatus of claim 13 , having a structure configured for performing a treatment selected from: hemodialysis, hemofiltration, hemodiafiltration, pure ultrafiltration, therapeutic plasma exchange, or a combination thereof.

15. 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 the tube for a peristaltic pump according to claim 1 .

16. A use of the tube according to claim 1 , comprising the step of coupling the tube with a peristaltic pump for fluid transport.

17. A use of a material for manufacturing a deformable tube comprising the steps of:
making a deformable tube entirely of a single layer of a material containing at least (i) a vinyl chloride resin having a K value of not less than 85 and no more than 105 measured according to standard ISO 1628-2, and (ii) a plasticizer comprising an ester of adipic acid; and
coupling the tube with a peristaltic pump for fluid transport, thereby reducing a drop in fluid flow rate following tube wear.

18. A use of a material containing: (i) 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 no more than 105; and (ii) less than 100 phr of a plasticizer comprising an ester of adipic acid; comprising the steps of:
manufacturing a deformable tube entirely of a single layer of the material; and
coupling the tube with a peristaltic pump for fluid transport, thereby limiting a drop of fluid flow rate of the peristaltic pump following wearing of the tube.

19. A process for manufacturing a deformable tube by extrusion, comprising stages of:
preparing a blend containing (i) 100 phr of a vinyl chloride resin having a K value, measured according to standard ISO 1628-2, of not less than 85, and (ii) between 40 and 100 phr of a plasticizer comprising an ester of adipic acid;
heating the blend to a temperature between 120° C. and 150° C.; and
extruding the deformable tube from the blend at a temperature between 160° C. and 180° C. entirely of a single layer of the material.

20. The process of claim 19 , wherein the deformable tube is sterilized by irradiation with penetrating rays.

Assignees

• Gambro Lundia Ab

Inventors

• Galavotti Francesca
• Giannella Carlo

Classifications

• F04B43/00 Primary

  Machines, pumps, or pumping installations having flexible working members (pumps or pumping installations specially adapted for elastic fluids F04B45/00) · CPC title

• F04B43/0072 Primary

  of tubular flexible members · CPC title

• B29C48/793

  upstream of the plasticising zone, e.g. heating in the hopper · CPC title

• A61M37/00

  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 title

• B29C48/832

  Heating · CPC title