Injection molded cannula system

1 . A method for manufacturing a cannula system, comprising:

providing a body having a mounting structure, the body being mounted onto a molding core pin;

threading a soft cannula on the mounting structure of the body;

injection molding a compressor on the soft cannula and at least part of the body, wherein the compressor circumferentially surrounds the mounting structure, at least part of the soft cannula and at least part of the body whereby the compressor forms a bonded connection with the at least part of the soft cannula and the at least part of the body;

cooling the compressor to thereby provide an internal material tension of the compressor; and

removing the molding core pin.

2 . The method according to claim 1 , wherein the body is injection molded onto the molding core pin.

3 . The method according to claim 1 , wherein only a distal end area of the soft cannula is threaded on the mounting structure, and wherein the compressor circumferentially surrounds only the distal end area of the soft cannula.

4 . The method according to claim 3 , wherein the distal end area of the soft cannula has a larger diameter than the remainder of the cannula before the cannula is threaded on the mounting structure.

5 . The method according to claim 1 , wherein the internal material tension of the compressor exerts a radially inwardly directed compression force.

6 . The method according to claim 1 , wherein the internal material tension of the compressor compresses the soft cannula.

7 . The method according to claim 1 , wherein the method includes two separate injection molding steps.

8 . The method according to claim 1 , wherein the bonded connection between the compressor and the at least part of the soft cannula is the sole means of connection between the compressor and the soft cannula and wherein the bonded connection between the compressor and the at least part of the body is the sole means of connection between the compressor and the body.

9 . The method according to claim 1 , wherein:

the bonded connection between the compressor and the at least part of the soft cannula is an adhesive-free connection and forms the sole means of connection between the compressor and the soft cannula;

wherein the bonded connection between the compressor and the at least part of the body is an adhesive-free connection and forms the sole means of connection between the compressor and the body and the bonded connection between the compressor and the body forms a sealingly tight connection; and

wherein the compressor exerts a compression force which is directed radially inwardly whereby the soft cannula has a first wall thickness and a second wall thickness, the first wall thickness being defined by the at least part of the soft cannula surrounded by the compressor and being smaller than the second wall thickness which is defined by a remainder of the soft cannula.

10 . A cannula system, comprising:

a soft cannula; and

a cannula assembly for holding the soft cannula, wherein the cannula assembly comprises a compressor and a body and wherein the body further comprises a mounting structure and a cavity configured to hold a septum;

wherein, the soft cannula is threaded onto the mounting structure and the compressor circumferentially surrounds the mounting structure and at least part of the body;

wherein, the compressor comprises an internal material tension configured for exerting a compression force on the soft cannula and the mounting structure; and

wherein the body and the compressor are connected by a bonded connection formed by injection molding the compressor on the at least part of the body and wherein the soft cannula and the compressor are connected by a bonded connection formed by injection molding the compressor on the soft cannula where the compressor circumferentially surrounds the mounting structure.

11 . The cannula system according to claim 10 , wherein only a distal end area of the soft cannula is threaded on the mounting structure, and wherein the compressor circumferentially surrounds the distal end area of the soft cannula.

12 . The cannula system according to claim 11 , wherein distal end area of the soft cannula has a larger diameter than the remainder of the soft cannula.

13 . The cannula system according to claim 11 , wherein the compressor compresses at least the distal end area of the soft cannula.

14 . The cannula system according to claim 10 , wherein the bonded connection between the compressor and the body is the sole means of connection between the compressor and the body, and wherein the bonded connection between the compressor and the soft cannula is the sole means of connection between the compressor and the soft cannula.

15 . The cannula system according to claim 14 , wherein the bonded connection between the compressor and the body forms a sealingly tight connection.

16 . The cannula system according to claim 10 , wherein:

the bonded connection between the compressor and the at least part of the soft cannula is an adhesive-free connection and forms the sole means of connection between the compressor and the soft cannula;

wherein the bonded connection between the compressor and the at least part of the body is an adhesive-free connection and forms the sole means of connection between the compressor and the body and the bonded connection between the compressor and the body forms a sealingly tight connection; and

wherein the compressor exerts a compression force which is directed radially inwardly whereby the soft cannula has a first wall thickness and a second wall thickness, the first wall thickness being defined by the at least part of the soft cannula surrounded by the compressor and being smaller than the second wall thickness which is defined by a remainder of the soft cannula.