Antimicrobial device comprising a cap with ring and insert

1. A device for insertion into a hub on a proximal end of a transdermal catheter, the device comprising:

a cap configured to be removably secured to the hub, the cap comprising:

a ring member comprising:

first threads configured to engage second threads on the hub of the transdermal catheter;

an opening through an interior of the ring member; and

at least one recess formed in the ring member;

an insert member positioned within the opening of the ring member, comprising:

a central protrusion extending axially along the insert member, the central protrusion having an outside surface; and

a fin projecting away from the outside surface of the central protrusion, the fin positioned within the at least one recess of the ring member in an assembled state of the device to prevent the ring member from rotating relative to the insert member when the cap is rotated and threaded onto the hub of the transdermal catheter;

wherein:

in the assembled state, the insert member is axially secured to the ring member so that the insert member is prevented from moving in any axial direction relative to the ring member; and

the insert member comprises an antimicrobial composition on at least a portion of the insert member.

2. The device according to claim 1 , wherein the fin has a tapered shape such that a width of the fin is greater at a proximal end of the fin than at a distal end of the fin.

3. The device according to claim 1 , wherein the ring member and the insert member are joined by an interference fit.

4. The device according to claim 1 , wherein the ring member has a sharp edge on a proximal edge of one or more tabs to deform into a surface of the insert member.

5. The device according to claim 1 , wherein the insert member further comprises a flange at a proximal end of the insert member and the central protrusion extends axially from the flange, wherein the outside surface of the central protrusion is tapered, and wherein an elongate member extends axially from a distal end of the central protrusion.

6. The device according to claim 1 , wherein the fin is sized and configured to provide an interference fit with the at least one recess of the ring member when the cap is in the assembled state.

7. The device according to claim 1 , wherein the ring member comprises a plurality of recesses between a plurality of tabs and the insert member comprises a plurality of fins located around a circumference of the insert member at or adjacent to the proximal end of the insert member, the plurality of fins being sized and configured to be received by the plurality of recesses of the ring member.

8. The device according to claim 1 , wherein the ring member comprises an antimicrobial on at least a portion of the first threads.

9. The device according to claim 1 , wherein the insert member further comprises an elongate member, the elongate member configured for insertion into the hub of the transdermal catheter.

10. The device according to claim 1 , wherein the insert member has a solid cross-section.

11. The device according to claim 1 , wherein the antimicrobial composition is a layer of dry antimicrobial on at least the outside surface of the insert member.

12. The device according to claim 1 , wherein the cap comprises a dry antimicrobial composition coated at least on an inside surface of the ring member and on the outside surface of the insert member.

13. A device for sealing a lumen of a transdermal catheter, the device comprising:

a cap configured to seal the lumen at a hub at a proximal end of the transdermal catheter, the cap comprising:

a ring member comprising:

first threads configured to engage second threads on the hub;

an opening through an interior of the ring member;

at least one recess;

an insert member comprising:

a tapered outer surface configured to engage a tapered inner surface in the hub to seal a fluid inside a lumen of the hub; and

one or more fins projecting away from the tapered outer surface;

wherein:

in an assembled state, the insert member is secured within the opening of the ring member; and

in the assembled state, the one or more fins of the insert member project into the at least one recess of the ring member so that the ring member is rotationally locked to the insert member at least when the device is rotated and threaded onto the hub at the proximal end of the transdermal catheter.

14. The device according to claim 13 , wherein an outer surface on the one or more fins is configured to engage an inner surface on the ring member, with the outer surface of the one or more fins having a greater diameter than the engaged inner surface on the ring member.

15. The device according to claim 13 , wherein the insert member comprises an antimicrobial composition on at least a portion of the insert member.

16. The device according to claim 13 , wherein the ring member comprises an antimicrobial on at least a portion of threads located on an interior of the ring member.

17. The device according to claim 13 , wherein the insert member comprises a central protrusion and an elongate member extending from the central protrusion, wherein the elongate member has an outer size that is less than an outer size of the central protrusion at a distal end of the central protrusion, and wherein the elongate member comprises an antimicrobial composition on at least a portion of the elongate member.

18. The device according to claim 13 , wherein the ring member and the insert member are joined by an interference fit.

19. The device according to claim 13 , wherein, in the assembled state, the insert member is axially fixed to the ring member such that the insert member is prevented from moving in any axial direction relative to the ring member.

20. A device for sealing a lumen of a transdermal catheter, the device comprising:

a cap configured to seal the lumen at a hub at a proximal end of the transdermal catheter, the cap comprising:

a ring member comprising:

first threads configured to engage second threads on the hub;

an opening through an interior of the ring member;

at least one recess;

an insert member comprising:

a tapered outer surface configured to engage a tapered inner surface

in the hub to seal a fluid inside a lumen of the hub; and

one or more fins projecting away from the tapered outer surface;

wherein:

in an assembled state, before the device is threaded onto the hub at the proximal end of the transdermal catheter, the insert member is axially secured to the ring member so that the insert member is at least inhibited from moving in any axial direction relative to the ring member; and

in the assembled state, the one or more fins are configured to project into the at least one recess to rotationally lock the insert member to the ring member.

21. The device according to claim 20 , wherein an outer surface on the one or more fins is configured to engage an inner surface on the ring member, with the outer surface of the one or more fins having a greater diameter than the engaged inner surface on the ring member.

22. The device according to claim 20 , wherein the insert member has a solid cross-section.

23. The device according to claim 20 , wherein the ring member comprises an antimicrobial on at least a portion of threads located on an interior of the ring member.

24. The device according to claim 20 , wherein the insert member comprises a central protrusion and an elongate member extending from the central protrusion, wherein the elongate member has an outer size that is less than an outer size of the central protrusion at a distal end of the central protrusion, and wherein the elongate member comprises an antimicrobial composition on at least a portion of the elongate member.

25. The device according to claim 20 , wherein, in the assembled state, before the device is threaded onto the hub at the proximal end of the transdermal catheter, the insert member is axially secured to the ring member so that the insert member is prevented from moving in any axial direction relative to the ring member.