Multi-lumen tube assemblies for medical fluid pumping systems

Patent metadata

Field	Value
Publication number	US-11207452-B2
Application number	US-201916556428-A
Country	US
Kind code	B2
Filing date	Aug 30, 2019
Priority date	Aug 30, 2019
Publication date	Dec 28, 2021
Grant date	Dec 28, 2021

Abstract

An assembly comprises a manifold configured to couple to a medical fluid cassette and a multi-lumen tube comprising a plurality of lumens within an outer wall of the multi-lumen tube. The manifold has a plurality of fluid connection ports and can be connected to the multi-lumen tube (e.g., via an adapter).

First claim

What is claimed is:

1. An assembly comprising:
a first manifold comprising a threaded portion and a plurality of fluid connection ports, the first manifold configured to couple to a medical fluid cassette;
a multi-lumen tube comprising a plurality of lumens within an outer wall of the multi-lumen tube, the multi-lumen tube having a first end and a second end opposite the first end;
an adapter comprising a first end and a second end opposite the first end, wherein:
the first end of the adapter is configured to mate with the manifold;
the second end of the adapter is configured to mate with the first end of the multi-lumen tube;
the adapter defines a plurality of passages between the first and second ends of the adapter; and
each passage connects one of the fluid connection ports of the manifold to a corresponding lumen of the multi-lumen tube when the adapter is mated with the manifold and the multi-lumen tube;

a threaded connector comprising a first end and a second end opposite the first end, the threaded connector defining an inner bore between the first and second ends of the threaded connector, the inner bore of the threaded connector configured to receive the adapter, the threaded connector being rotatable relative to the adapter, and the first end of the threaded connector being threaded and configured to mate with the threaded portion of the manifold to secure the adapter to the manifold;
a second manifold configured to mate with the second end of the multi-lumen tube;
a plurality of fluid lines configured to be connected to the second manifold such that each of the fluid lines is in fluid communication with a corresponding one of the lumens of the multi-lumen tube; and
a plurality of fluid bags configured to be connected to the plurality of fluid lines.

2. The assembly of claim 1 , wherein each fluid connection port of the manifold comprises a tapered boss configured to mate with the corresponding passage of the adapter.

3. The assembly of claim 1 , wherein one of the passages defined by the adapter connects one of the fluid connection ports of the manifold to a volume interior to the outer wall of the multi-lumen tube but exterior to each of the lumens when the adapter is mated with the manifold and the multi-lumen tube.

4. The assembly of claim 1 , wherein the threaded end of the manifold is female, and the threaded first end of the threaded connector is male.

5. The assembly of claim 1 , wherein at least one of the fluid pouches connected to the fluid lines contains a dialysis fluid.

6. The assembly of claim 1 , further comprising the medical fluid cassette.

7. The assembly of claim 6 , wherein the medical fluid cassette is a dialysis fluid cassette.

8. The assembly of claim 7 , wherein the dialysis fluid cassette is a peritoneal dialysis fluid cassette.

9. The assembly of claim 1 , wherein the manifold is coupled to the cassette.

10. The assembly of claim 9 , wherein each passage connects one of the fluid connection ports of the manifold to a corresponding port of the medical fluid cassette.

11. The assembly of claim 9 , wherein the manifold is permanently connected to the cassette.

12. The assembly of claim 11 , wherein the manifold is integrally formed with the cassette.

13. The assembly of claim 1 , wherein the multi-lumen tube comprises three or more lumens.

14. A medical fluid cassette assembly comprising:
a body at least partially defining a plurality of fluid passages, the body comprising a plurality of fluid line connectors in fluid communication with the fluid passages;
a first manifold connected to the body, the first manifold comprising a plurality of fluid connection ports, the first manifold configured to mate with a first end of a multi-lumen tube comprising a plurality of lumens disposed within an outer wall of the multi-lumen tube, wherein each fluid connection port mates with a corresponding lumen of the multi-lumen tube when the first manifold mates with the first end of the multi-lumen tube;
a second manifold configured to mate with a second end of the multi-lumen tube;
a plurality of fluid lines configured to be connected to the second manifold such that each of the fluid lines is in fluid communication with a corresponding one of the lumens of the multi-lumen tube when the multi-lumen tube mates with the second end of the second manifold; and
a plurality of fluid bags configured to be connected to the plurality of fluid lines.

15. The medical fluid cassette assembly of claim 14 , wherein the manifold is permanently connected to the body of the medical fluid cassette.

16. The medical fluid cassette assembly of claim 14 , wherein the manifold is integrally formed with the body of the medical fluid cassette.

17. The medical fluid cassette assembly of claim 14 , further comprising a film attached to the body, the film and the body cooperating to define the plurality of fluid passages.

18. A medical fluid pumping system comprising:
a medical fluid pumping machine comprising a cassette compartment;
a medical fluid cassette configured to be disposed in the cassette compartment of the medical fluid pumping machine, the medical fluid cassette connected to a first manifold comprising a plurality of fluid connection ports; and
a multi-lumen tube comprising:
a first end;
a second end;
an outer wall extending between the first end and the second end;
a plurality of lumens disposed within the outer wall, wherein the first end of the multi-lumen tube is configured to be connected to the first manifold, and each of the lumens is configured to mate with a corresponding one of the fluid connection ports of the first manifold when the first end of the multi-lumen tube is connected to the first manifold;
a second manifold configured to mate with a second end of the multi-lumen tube;
a plurality of fluid lines configured to be connected to the second manifold such that each of the fluid lines is in fluid communication with a corresponding one of the lumens of the multi-lumen tube when the multi-lumen tube mates with the second end of the second manifold; and
a plurality of fluid bags configured to be connected to the plurality of fluid lines.

19. A method comprising:
mating a first end of a multi-lumen tube to a first manifold of a medical fluid cassette, wherein the multi-lumen tube comprises a plurality of lumens disposed within an outer wall of the multi-lumen tube, the first manifold comprises a plurality of fluid connection ports, and mating the first end of the multi-lumen tube to the first manifold comprises mating each of the lumens of the multi-lumen tube to a corresponding one of the fluid connection ports of the first manifold;
mating a second manifold to a second end of the multi-lumen tube;
mating a plurality of fluid lines to the second manifold such that each of the fluid lines is in fluid communication with a corresponding one of the lumens of the multi-lumen tube;
mating a plurality of fluid bags to the plurality of fluid lines; and
flowing a medical fluid from each of the fluid bags through each of the lumens of the multi-lumen tube to the medical fluid cassette.

20. The method of claim 19 , further comprising flowing fluid through a volume interior to the outer wall of the multi-lumen tube but exterior to each of the lumens.

Assignees

• Fresenius Medical Care Holdings Inc

Inventors

• Schmidt Daniel
• Egley Bert D

Classifications

• A61M2039/082

  Multi-lumen tubes · CPC title

• A61M2205/12

  with interchangeable cassettes forming partially or totally the fluid circuit · CPC title

• A61M2039/1066

  having protection means, e.g. sliding sleeve to protect connector itself, shrouds to protect a needle present in the connector, protective housing, isolating sheath · CPC title

• A61M39/12

  for joining a flexible tube to a rigid attachment · CPC title

• A61M39/105

  Multi-channel connectors or couplings, e.g. for connecting multi-lumen tubes (multi-channel connectors in general F16L37/56) · CPC title