Lockable adapter assembly

An enteral adapter assembly for connecting an enteral fluid source with a fluid outlet provided on the enteral fluid source to an enteral feed tube, the assembly comprising:

• an adapter including a proximal end comprising a first connection portion for attaching to the fluid outlet provided on the enteral fluid source, a distal end comprising a first threaded connection portion for screwing to an end of the enteral feed tube, and a fluid conduit extending between the proximal end of the adapter and the distal end of the adapter, and
• a removable cap having a second threaded connection portion configured for screwing the cap onto the first threaded connection portion,
• wherein the first connection portion of the proximal end of the adapter includes a third threaded connection portion configured for forming a screw connection with the fluid outlet to form a fluid-tight connection between the fluid outlet and the fluid conduit,
• wherein the proximal end of the adapter further comprises a locking member configured to irreversibly mate with a corresponding feature provided on the fluid outlet provided on the enteral fluid source as the adapter is screwed on to the fluid outlet to prevent removal of the adapter from the fluid outlet when the cap is unscrewed from the distal end of the adapter,
• wherein the locking member comprises a deflectable element that is configured to deflect in a longitudinal direction towards the distal end of the adapter as the adapter is screwed on to the fluid outlet and thereby irreversibly mate with the corresponding feature on the fluid outlet.

An adapter assembly for connecting a fluid source with a fluid outlet provided on the fluid source to a fluid conduit, the assembly comprising:

• an adapter including a proximal end comprising a first connection portion for attaching to the fluid outlet provided on the fluid source, a distal end comprising a first threaded connection portion for screwing to an end of the fluid conduit, and a passage for fluid flow extending between the proximal end of the adapter and the distal end of the adapter, and
• a removable cap having a second threaded connection portion configured for screwing the cap onto the first threaded connection portion,
• wherein the first connection portion of the proximal end of the adapter includes a third threaded connection portion configured for forming a screw connection with the fluid outlet to form a fluid-tight connection between the fluid outlet and the fluid conduit,
• wherein the proximal end of the adapter further comprises a locking member configured to irreversibly mate with a corresponding feature provided on the fluid outlet provided on the fluid source as the adapter is screwed on to the fluid outlet to prevent removal of the adapter from the fluid outlet when the cap is unscrewed from the distal end of the adapter,
• wherein the locking member comprises a deflectable element that is configured to deflect in a longitudinal direction towards the distal end of the adapter as the adapter is screwed on to the fluid outlet and thereby irreversibly mate with the corresponding feature on the fluid outlet.