Medicated module assembly with automatic trigger

摘要

A module assembly for use with an injection system to co-deliver at least two medicaments is disclosed where a primary delivery device containing a primary medicament accepts the module that has an automatic triggering system activated by a dispense interface needle guard. When the module contains a single dose of a secondary medicament, both the primary and secondary medicaments are delivered through a single dispense interface, preferably a hollow needle. The module assembly does not require the user to manually engage a reservoir containing the secondary medicament. Instead, a trigger automatically activates movement of a lower hub when the needle guard is retracted.

主权项

1. A module assembly attachable to a drug delivery device, comprising,
an outer housing having an inner surface having a trigger, a proximal end and a distal end, where the proximal end has an upper hub and configured for attachment to a drug delivery device; a needle guard at the distal end having inner and outer walls with a pass through opening between the inner and outer walls, where the outer wall engages the inner surface of the outer housing to prevent the needle guard from rotating when moving axially in a proximal direction; a lower hub axially movable in the proximal direction and having a flexible arm projecting through the pass through opening of the needle guard to lock the lower hub to the needle guard; and a biasing member in a pre-compressed state and positioned between the proximal inner face of the needle guard and the distal face of the lower hub; wherein the upper hub includes a first double-ended needle and the lower hub includes a second double-ended needle and; wherein retraction of the needle guard in a proximal direction carries the lower hub along with the needle guard until the flexible arm engages the trigger causing the flexible arm to exit the pass through opening.