Extracorporeal circulation cassette

Patent metadata

Field	Value
Publication number	US-11964083-B2
Application number	US-201716077532-A
Country	US
Kind code	B2
Filing date	Feb 6, 2017
Priority date	Feb 18, 2016
Publication date	Apr 23, 2024
Grant date	Apr 23, 2024

Abstract

This extracorporeal circulation cassette is provided with: a blood circuit ( 10 ) comprising a flexible tube and having a blood tube access portion set in a predetermined position in a device; a dialysate circuit ( 12 ) comprising a flexible tube and having a dialysate tube access portion set in a predetermined position in the device; a first panel ( 4 ) and a second panel ( 6 ) that are rigid and that integrate the blood circuit ( 10 ) and the dialysate circuit ( 12 ) while sandwiching the blood circuit ( 10 ) and the dialysate circuit ( 12 ) from both sides; and a window portion formed in a part of at least one of the first panel ( 4 ) and the second panel ( 6 ), disposed in a predetermined position in the device. The blood tube access portion and the dialysate tube access portion are positioned in the window portion.

First claim

The invention claimed is:

1. An extracorporeal circulation cassette, comprising:
a blood circuit formed of a flexible tube and including a blood tube access portion which is configured to be slidably inserted into a cassette slot of an apparatus;
first and second panels configured to contact each other in a unified configuration by sandwiching the blood circuit from both sides and having rigidity, wherein the first panel comprises a recess, the second panel comprises a projection, wherein in the unified configuration, the projection extends into at least a portion of the recess; and
a window formed at a part slidably inserted into the cassette slot of at least one of the first and second panels, wherein
the blood tube access portion of the blood circuit stored in a space formed by the first and second panels is disposed at the window, and
a part of the blood circuit other than the blood tube access portion is exposed from the cassette slot when the extracorporeal circulation cassette is in an inserted configuration in the cassette slot,
wherein the window has an opening in at least one of the first panel and the second panel,
wherein the flexible tube extends through a tube opening of at least one of the first panel and the second panel between the first panel and the second panel, in the unified configuration, and
wherein the tube opening is between the opening and a proximal edge of at least one of the first panel and the second panel.

2. The extracorporeal circulation cassette according to claim 1 , wherein
at least part of the portion other than the blood tube access portion of the blood circuit is disposed in the space formed by the first panel and the second panel, between the first panel and the second panel in the unified configuration.

3. The extracorporeal circulation cassette according to claim 1 , further comprising:
a dialysate circuit formed of a flexible tube and including a dialysate tube access portion which is configured to be inserted into the cassette slot of the apparatus, wherein
the dialysate circuit is stored in the space formed by the first and second panels, and
the dialysate tube access portion of the dialysate circuit is disposed at the window.

4. The extracorporeal circulation cassette according to claim 3 , wherein
at least part of the portion other than the dialysate tube access portion of the dialysate circuit is disposed in the space formed by the first and second panels.

5. The extracorporeal circulation cassette according to claim 4 , wherein
the blood tube access portion of the blood circuit and the dialysate tube access portion of the dialysate circuit are exposed at the opening.

6. The extracorporeal circulation cassette according to claim 1 , wherein
the blood tube access portion is set at a prescribed position of a blood flow rate controller that controls a flow rate of blood, a bubble detector that detects bubbles, a pressure detector that detects pressure, a blood detector that detects blood, a clamp unit that closes the blood tube access portion, or a flow rate detector that detects a flow rate of blood.

7. The extracorporeal circulation cassette according to claim 3 , wherein
the dialysate tube access portion is set at a prescribed position of a dialysate flow rate controller that controls a flow rate of dialysate, a blood detector that detects blood, a pressure detector that detects pressure, a clamp unit that closes the dialysate tube access portion, or a flow rate detector that detects a flow rate of dialysate.

8. The extracorporeal circulation cassette according to claim 1 , wherein
one side shape of the first and second panels, in the unified configuration, is asymmetric to the other side shape thereof.

9. The extracorporeal circulation cassette according to claim 1 , wherein
one side of the first and second panels, in the unified configuration, has different thicknesses from the other side thereof.

10. The extracorporeal circulation cassette according to claim 1 , wherein
the first and second panels, in the unified configuration, include a guide, the guide configured to fit into a rail formed in the cassette slot at one side and the other side.

11. The extracorporeal circulation cassette according to claim 1 , wherein
the portion of at least one of the first and second panels, which is configured to be inserted into the cassette slot, includes a cassette-side fitting portion fitted to a cassette-slot-side fitting portion formed in the cassette slot.

12. The extracorporeal circulation cassette according to claim 1 , wherein
the first and second panels are formed by bending a single panel.

13. The extracorporeal circulation cassette according to claim 1 , further comprising:
a blood purification unit.

14. The extracorporeal circulation cassette according to claim 13 , wherein
a space is formed between the blood purification unit and the first and second panels.

15. The extracorporeal circulation cassette according to claim 3 , further comprising:
narrow portions provided on at least one of the first and second panels and fitted to connectors connected on both ends of the blood tube access portion and both ends of the dialysate tube access portion.

16. The extracorporeal circulation cassette according to claim 1 , wherein
the blood circuit only protrudes from one edge of the extracorporeal circulation cassette.

17. The extracorporeal circulation cassette according to claim 1 , wherein
the flexible tube of the blood circuit comprises an inlet tube and an outlet tube, wherein the inlet tube is configured to connect to an inlet of a blood purification unit and the outlet tube is configured to connect to an outlet of the blood purification unit.

18. The extracorporeal circulation cassette according to claim 1 , wherein the first panel comprises an edge recess, and the apparatus comprises a projection,
wherein, in the inserted configuration, the projection of the apparatus extends at least partially into the edge recess.

19. The extracorporeal circulation cassette according to claim 1 , wherein
the window has an opening in both the first panel and the second panel, wherein the recess is between the opening of the first panel and a distal edge of the first panel, and the projection is between the opening of the second panel and a distal edge of the second panel.

Assignees

• Nikkiso Co Ltd

Inventors

• Nimura Hiroshi
• Masuda Yoshimichi
• Fujiwara Masato

Classifications

• A61M1/1621 Primary

  Constructional aspects thereof (semi-permeable membranes for separation processes characterised by their properties B01D69/00; semi permeable membranes characterised by their material B01D71/00) · CPC title

• A61M1/15632

  the filter being a dialyser · CPC title

• A61M1/16 Primary

  with membranes · CPC title

• A61M1/1652

  Holding or locking systems for the membrane unit · CPC title

• A61M1/1668

  Details of containers · CPC title