CONNECTOR ASSEMBLY FOR CONNECTING MEDICAL LINES COMPRISING A CAP ELEMENT

Abstract

A connector assembly for connecting medical lines (3, 4) to each other comprises a first connector (1) having an insertion shaft (12) to be inserted, along an insertion direction (I), into an insertion opening (22) of a second connector (2) for forming a fluid connection between the medical lines (3, 4), the insertion shaft (12) comprising a fluid channel (120) allowing fluid to flow in between the first connector (1) and the second connector (2). Herein, a cap element (14) is attachable to the first connector (1) for closing the fluid channel (120) towards the outside in a state in which the first connector (1) is not connected to the second connector (2), the first connector (1) having a first retention device (123) and the cap element (14) having a second retention device (143), the first retention device (123) and the second retention device (143) being configured to form a positive locking engagement in between the cap element (14) and the first connector (1) along the insertion direction (I).

Claims

1. Connector assembly for connecting medical lines to each other, comprising: a first connector having an insertion shaft to be inserted, along an insertion direction (I), into an insertion opening of a second connector for forming a fluid connection between the medical lines, the insertion shaft comprising a fluid channel allowing fluid to flow in between the first connector and the second connector characterized by a cap element attachable to the first connector for closing the fluid channel towards the outside in a state in which the first connector is not connected to the second connector, the first connector having a first retention device and the cap element having a second retention device, the first retention device and the second retention device being configured to form a positive locking engagement in between the cap element and the first connector along the insertion direction (I).

2. Connector assembly according to claim 1, characterized in that the first retention device is formed within the fluid channel of the insertion shaft.

3. Connector assembly according to claim 1, characterized in that the first retention device is formed as a recess in a wall surrounding the fluid channel.

4. Connector assembly according to claim 1, characterized in that the cap element comprises a cap head, the second retention device protruding from the cap head along the insertion direction (I).

5. Connector assembly according to claim 1, characterized in that the second retention device comprises at least one retention head at an end opposite to the cap head, the at least one retention head being formed to form said positive locking engagement with the first retention device.

6. Connector assembly according to claim 1, characterized in that the insertion shaft has a cylindrical or conical shape, the fluid channel extending along the insertion direction (I) in the insertion shaft.

7. Connector assembly according to claim 1, characterized in that the first connector comprises a first body circumferentially extending about the insertion shaft such that an inner space is formed radially in between the first body and the insertion shaft, the cap element comprising an insertion portion insertable into the inner space.

8. Connector assembly according to claim 7, characterized in that the insertion portion is arranged concentrically with the second retention device.

9. Connector assembly according to claim 7, characterized hi that the insertion portion is arranged radially outside of the second retention device.

10. Connector assembly according to claim 7, characterized in that the cap element is configured to close the inner space towards the outside when the cap element is attached to the first connector.

11. Connector assembly according to claim 7, characterized in that the first body comprises a screw thread for connecting the first connector and the second connector to each other.

12. Connector assembly according to claim 1, characterized in that the first connector comprises a first connection shaft axially aligned with the insertion shaft for receiving a first connection line.

Description

[0026] The idea underlying the invention shall subsequently be explained in more detail with reference to the embodiments shown in the figures. Herein:

[0027] FIG. 1 shows a schematic drawing of a feeding line placed on a patient;

[0028] FIG. 2 shows an embodiment of a connector assembly having a first connector and a second connector; and

[0029] FIG. 3 shows an embodiment of a first connector comprising a cap element.

[0030] FIG. 1 shows a schematic drawing of a feeding line assembly comprising feeding lines 3, 4 placed on a patient P.

[0031] The feeding lines 3, 4 for example serve for providing for an enteral feeding of the patient P. For this, a first line 3 may, for example through an incision in the abdomen of the patient P, be inserted into the stomach of the patient P and may be used as a port for a long-term enteral feeding. A second feeding line 4 is connected to the first feeding line 3 via a connector assembly comprising connectors 3, 4, the second feeding line 4 for example being connected to a container comprising an enteral feeding solution, which via the lines 3, 4 is delivered towards the patient P for example using a suitable pumping device.

[0032] Whereas the second feeding line 4 may be used for example only once in connection with the container comprising the enteral feeding solution and may be disposed after use, the feeding line 3 placed on the patient P may remain on the patient P for a rather long term, for example a few days or even a few weeks, and may be used multiple times to carry out multiple feeding procedures. There hence is a necessity to keep the feeding line 3 as well as the connector 1 connected to the feeding line 3 clean, such that a contamination of the feeding line 3 and the connector 1 connected to it is effectively prevented.

[0033] An embodiment of a connector assembly comprising connectors 1, 2 is shown in FIG. 2. The first connector 1 herein may for example be connected to the feeding line 3 placed on the patient P, whereas the second connector 2 is arranged on the other, second feeding line 4 connected to a container comprising a feeding solution.

[0034] The first connector 1, in this embodiment, comprises a cylindrical body 10 circumferentially coaxially extending about a cylindrical or conical insertion shaft 12 and forming, together with the insertion shaft 12, a radial inner space 13. On the inner wall of the body 10 a screw thread 100 is arranged allowing for a screw type connection with the second connector 2.

[0035] The insertion shaft 12 can be inserted in an insertion direction I into an insertion opening 22 in a body 20 of the second connector 2. On the body 20 of the second connector 2 a screw thread 200 is arranged, such that the second connector 2 can be screwed into the inner space 13 of the first connector 1 by engaging the screw threads 100, 200 with each other and by screwing the first connector 1 along a screwing direction S on the second connector 2.

[0036] The insertion shaft 12 has a substantially cylindrical or conical shape having a circular cross section. The insertion opening 22 of the second connector 2 has a corresponding, complementary shape and hence is suited to receive the insertion shaft 12.

[0037] When screwing the connectors 1, 2 on to each other, the insertion shaft 12 is inserted into the insertion opening 22. The insertion shaft 12 comprises a fluid channel 120, which extends through the insertion shaft 12 and through a shaft 11 aligned with the insertion shaft 12, the shaft 11 being connected to the associated feeding line 3. Likewise, the insertion opening 22 is aligned with a shaft 21 of the second connector 2, the shaft 21 being connected to the feeding line 4. Hence, by connecting the connectors 1, 2 to each other, a fluid connection between the feeding lines 3, 4 can be established, such that a medical fluid such as an enteral feeding solution may pass from the feeding line 4 through the connectors 1, 2 into the feeding line 3.

[0038] The connectors 1, 2 each may for example be fabricated from a comparatively hard plastics material, for example by injection molding.

[0039] In a state in which the second connector 2 is not arranged on the first connector 1, it is desirable to prevent a contamination of the first connector 1 from the outside as well as a fluid leakage from the fluid channel 120 formed in the insertion shaft 12 of the first connector 1. For this, in the embodiment of FIG. 3 a cap element 14 is provided which for example may be formed from a soft elastic material, such as a soft plastics material, for example an elastomer, or a rubber material. The cap element 14 may be placed on the first connector 1 along the insertion direction I such that, when it is attached to the first connector 1, it closes the first connector 1, in particular the fluid channel 120 formed within the first connector 1 towards the outside.

[0040] The cap element 14 comprises an insertion portion 141 protruding from a cap head 140 and being integrally formed with the cap head 140. The insertion portion 141 may be introduced into the space 13 formed radially in between the insertion shaft 12 and the body 10 of the first connector 1 such that the space 13 is at least partially filled by means of the insertion portion 141 if the cap element 14 is attached to the first connector 1.

[0041] Radially inside the insertion portion 141 of the cap element 14 an opening is formed which serves to receive the insertion shaft 12 when the cap element 14 is attached to the first connector 1. The cap element 14 comprises a retention device 143 in the shape of a pin carrying a retention head 144 forming a circumferentially surrounding, protruding locking protrusion 145, the retention device 143 protruding from the cap head 140 into the opening formed by the insertion portion 141 along the insertion direction I.

[0042] The retention device 143, in the shown embodiment, is rotationally symmetric, the locking protrusion 145 extending circumferentially about the retention head 144. The retention device 143 herein is concentrical with the insertion portion 141, the insertion portion 141 circumferentially encompassing the retention device 143.

[0043] The retention device 143 of the cap element 14 serves to engage with a retention device 123 formed by a recess within the fluid channel 120 of the first connector 1. The retention device 123 in the shape of the recess is formed by a radial widening of the fluid channel 120, the recess 123 forming a stop face 124 in the vicinity of the outer end of the insertion shaft 120. In particular, the stop face 124 forms a step with respect to a wall 125 surrounding the fluid channel 120 in the vicinity of the outer end of the insertion shaft 12.

[0044] When the cap element 14 is attached on the first connector 1, the retention device 143 with its retention head 144 is plugged into the fluid channel 120 and comes into engagement with the retention device 123 formed as a recess within the fluid channel 120 such that the locking protrusion 145 abuts the stop face 124 and a positive locking engagement in between the cap element 14 and the first connector 1 is established. The cap element 14 hence is held on the first connector 1 such that it may not easily fall off the first connector 1.

[0045] Because the cap element 14 may beneficially be formed from a soft elastic material, a user may remove the cap element 14 from the first connector 1 by pulling it off the first connector 1 in the insertion direction I. The retention device 123 is integrally formed with the cap element 14 and is also formed from a soft elastic material, such that the retention head 144 may deform for releasing the locking engagement with the retention device 123 in the shape of the recess formed in the fluid channel 120.

[0046] In one embodiment, the retention device 123 in the shape of the recess is only locally formed within the fluid channel 120. The retention device 123 herein is formed at the axial location at which a positive locking engagement in between the retention device 143 of the cap element 14 and the retention device 123 of the first connector 1 is to be established.

[0047] In another embodiment, the retention device 123 may extend all the way through the shaft 11 adjoining the body 10, as this is shown in the embodiment of FIG. 3. This may ease the manufacturing of the first connector 1 by means of an injection molding technique because the retention device 123 in the shape of the recess may easily be formed within an injection molding tool.

[0048] If a second connector 2 is to be connected to the first connector 1, the cap element 14 may be removed from the first connector 1 such that the second connector 2 may be arranged on the first connector 1 establishing a screw connection in between the connectors 1, 2. If the second connector 2 is again removed, the cap element 14 (or another, un-used cap element 14) may be once more placed on the first connector 1.

[0049] The invention is not limited to the embodiments described above, but may be implemented in an entirely different fashion.

[0050] For example, a connector assembly of the kind described herein may not only be used for the enteral feeding, but may be used for connecting any medical lines to each other for transferring medical solutions, such as medication, nutritional solutions, saline solutions or any other solutions.

LIST OF REFERENCE NUMERALS

[0051] 1 Connector (male part) [0052] 10 Body [0053] 100 Screw thread [0054] 101 Protrusion [0055] 11 Shaft [0056] 12 Insertion shaft [0057] 120 Fluid channel [0058] 121 Surface (outer wall) [0059] 122 Tip [0060] 123 First retention device (recess) [0061] 124 Stop face [0062] 125 Wall [0063] 13 Space [0064] 14 Cap element [0065] 140 Cap head [0066] 141 Insertion portion [0067] 142 Inner space [0068] 143 Second retention device [0069] 144 Retention head [0070] 145 Locking protrusion [0071] 2 Connector (female part) [0072] 20 Body [0073] 200 Screw thread [0074] 21 Shaft [0075] 22 Insertion opening [0076] 3 Line [0077] 4 Line [0078] I Insertion direction [0079] P Patient [0080] S Screwing direction