Antimicrobial device comprising a cap with ring and insert

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

• providing 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;
• applying an antimicrobial composition to at least a portion of an insert member, wherein the insert member has at least one fin projecting radially outwardly from an outer surface of the insert member, the at least one fin being configured to be received by the at least one recess of the ring member;
• and
• advancing the insert member through the opening of the ring member so that the at least one fin advances into at least one recess of the ring member so as to secure the insert member to the ring member such that the ring member is at least inhibited from rotating relative to the insert member;
• wherein the device is configured such that, in an assembled state, the at least one fin and the recess prevent the ring member from rotating relative to the insert member when the device is rotated and threaded onto the hub on a proximal end of the transdermal catheter.

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;
• a plurality of tabs extending into the opening;
• at least one recess between the plurality of tabs;
• 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 outer surface;
• wherein:
• the insert member is secured within the opening of the ring member;
• and
• the one or more fins are configured to engage the tabs to prevent significant rotational movement of the insert member relative to the ring member when the cap is rotated and threaded onto the hub at a proximal end of the transdermal catheter.