Catheter Head Comprising a Mobile Connector

• US 20070112303A1
• Filed: 11/29/2006
• Published: 05/17/2007
• Est. Priority Date: 06/02/2004
• Status: Active Grant

• Current Assignee: Roche Diagnostics International AG (Roche Holding AG)
• Original Assignee: Roche Diagnostics International AG (Roche Holding AG)
• Inventors: Liniger, Jurg
• Granted Patent: US 7,766,874 B2
• Time in Patent Office: Days
• US Class Current: 604/164.10
• CPC Class Codes: A61M 2005/1581 Right-angle needle-type devices
• CPC Class Codes: A61M 2005/1587 suitable for being connected to an infusion line after insertion into a patient
• CPC Class Codes: A61M 2205/197 by the seal material
• CPC Class Codes: A61M 39/04 having pierceable self-sealing members
• CPC Class Codes: A61M 39/0606 without means for adjusting the seal opening or pressure A61M39/0693 takes precedence
• CPC Class Codes: A61M 5/158 Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body

Abstract

A catheter head for medical and therapeutic applications including a catheter head housing, a cannula which protrudes from the catheter head and is to be introduced into organic tissue, a container connection for connecting a container containing a fluid to be administered, a fluid channel through which the fluid flows during the administration thereof, an injection needle connection for connecting an injection needle, a connection chamber which is adjacent to the cannula, the injection needle connection, and the fluid channel, and a connector that is arranged in a first position such that the injection needle can be guided from the injection needle connection into the connection chamber and then into the cannula, and in a second position such that it closes the connection chamber from the injection needle connection in a sealing manner after the injection needle has been removed.

Claims

1. A catheter head for medical and pharmaceutical applications, comprising:

a catheter head housing;

a cannula, which extends from the catheter head for being inserted into organic tissue;

a fluid attachment for attaching a fluid delivery means which delivers a fluid to be administered;

a fluid channel through which the fluid flows during administration;

a puncture needle attachment for attachment of a puncture needle;

a connection chamber which adjoins the cannula, the puncture needle attachment and the fluid channel; and

a moveable connector which, in a first position, is arranged in such a way that a puncture needle can be guided from the puncture needle attachment into the connection chamber and from there into the cannula, and which, in a second position, is arranged in such a way that it fluidically separates the cannula from the puncture needle attachment after the puncture needle has been removed.

2. The catheter head according to claim 1, wherein the connector is locked in the second position.

3. The catheter head according to claim 2, wherein the connector catches.

4. The catheter head according to claim 3, wherein at least one of the connector and catheter head housing is provided with a blocking device which prevents a return movement of the connector from the second position by means of engagement with the other one of the connector and catheter head housing.

5. The catheter head according to claim 4, wherein the blocking device comprises elements and wherein the movement of one element or of several elements into the blocking engagement is effected by an elasticity force.

6. The catheter head according to claim 5, wherein a movement of the connector is a displacement of the connector.

7. The catheter head according to claim 1, wherein the catheter head housing guides the connector in its movement in a linear manner along a movement axis in a manner secure against twisting.

8. The catheter head according to claim 1, wherein the movement of the connector from the first position to the second position is coupled to the attaching of the fluid delivery means.

9. The catheter head according to claim 1, wherein in the first position the connector extends beyond the catheter head in the area of the fluid attachment and, upon attaching of the fluid delivery means, is moved by the fluid delivery means into the second position.

10. The catheter head according to claim 1, wherein the moving of the connector is coupled to the withdrawal of the puncture needle from the puncture needle attachment.

11. The catheter head according to claim 1, wherein the moving of the connector requires a separate actuation.

12. The catheter head according to claim 1, wherein the fluid channel is sealed from the fluid attachment by a septum.

13. The catheter head according to preceding claim 1, wherein the connector forms a wall of the fluid channel and is a hollow body.

14. The catheter head according to claim 13, wherein the fluid channel extends within the connector and is moved along with a movement of the connector.

15. The catheter head according to claim 14, wherein the connector has a passage for the fluid which is connected to the fluid channel, the passage being closed in the first position of the connector connecting the fluid channel to the cannula in the second position of the connector.

16. The catheter head according to claim 13, wherein in the first position the connector has an opening directed toward the connection chamber, and wherein this opening is sealingly closed in the second position of the connector.

17. The catheter head according to claim 1, wherein the fluid channel extends outside the connector through the catheter head housing.

18. The catheter head according to claim 1, wherein the connector has a harder area and a softer area, wherein the softer area effectuates the seal against the catheter head housing in the second position of the connector.

19. The catheter head according to claim 1, further comprising a cannula head which encloses the cannula at the connection chamber, wherein the connector consists of a hard main body and the cannula head of a softer material, so that, in the second position of the connector, a hard/soft seal is formed between the main body and the cannula head.

20. The catheter head according to claim 1, wherein the connector is made of a soft material.

21. A catheter head comprising:

a housing;

a cannula extending from the housing;

a fluid attachment for attaching a fluid delivery means which delivers a fluid;

a fluid channel through which the fluid flows;

a puncture needle attachment for attachment of a puncture needle;

a connection chamber which adjoins the cannula, the puncture needle attachment and the fluid channel; and

a connector having two positions, a first position in which a puncture needle can be guided from the puncture needle attachment into the connection chamber and into the cannula and a second position in which the cannula is fluidically separated from the puncture needle attachment after the puncture needle has been removed.

22. The catheter head according to claim 21, further comprising a lock for releasably securing the connector in one of said two positions.

23. The catheter head according to claim 22, wherein the connector has a harder area and a softer area.

24. The catheter head according to claim 23, wherein the softer area effectuates a seal against the housing in the second position of the connector.