Medicated module with user selection
A medicated module for an injection system to co-deliver at least two medicaments is disclosed where a primary delivery device containing a primary medicament accepts a medicated module containing a single dose of a secondary medicament and where both medicaments are delivered through a hollow needle. The medicated module is user selectable so that it will deliver a priming dose of a primary medicament or both the primary and secondary medicaments. The module also contains a needle guard that locks after dose delivery. The needle guard prevents accidental needle sticks before and after an injection. A locking collar rotates during use as an inner protrusion follows three paths of a track located on the outer surface of a body housing. When the inner facing protrusion is in the third path, it encounters a hard stop and a rotational bias that locks the guard from further refraction and thus covers the sharp distal end of the needle.
1. A medicated module attachable to a drug delivery device, comprising,
a housing;
a distal needle and a proximal needle, both arranged within the housing, wherein the proximal needle is fixed in a hub connected to a proximal end of the housing;
a reservoir arranged within the housing and being biased axially in a distal direction by a capsule spring, the reservoir comprising a single dose of a medicament prior to attachment to the drug delivery device, where the capsule spring is positioned within the housing to create a void space between the hub and the reservoir to prevent the proximal needle from fluid communication with the medicament in the reservoir and to provide a biasing force that offsets an axial displacement of a septum or a keeper hermetically sealing the reservoir at its proximal end;
a needle guard adapted and arranged to provide protection of the distal needle;
a needle guard spring having a distal end and a proximal end, where the proximal end engages the housing to bias the needle guard in a distal position to provide the protection of the at least one needle cannula;
a selector operably connected to the reservoir, the selector being configured to enable selection between different operating conditions of the module for enabling the reservoir to overcome the biasing effect of the capsule spring and to move proximally to come into fluid engagement with the distal and proximal needles.
2. The medicated module of claim 1 , wherein the selector is operably connected to the needle guard.
3. The medicated module according to claim 1 , wherein the selector comprises one or more tactile features adapted and arranged to be gripped by a user, the tactile features being configured to allow movement of the selector with respect to the housing into one or more predetermined positions.
4. The medicated module of claim 3 , wherein the selector positions comprise,
a first position, where the needle guard is prevented from moving axially with respect to the housing, and where the proximal needle is not in fluid communication with the reservoir; and
a second position, where movement of the needle guard in an axial direction with respect to the housing is allowed and where fluid communication of the proximal needle with the reservoir is enabled.
5. The medicated module according to claim 4 , wherein, when the needle guard is moved axially with respect to the housing when the selector is in the second position, the reservoir is moved in a proximal direction with respect to the housing to enable fluid engagement of the proximal needle with the reservoir.