Intermediate product for producing pre-filled dual-chamber syringes or cartridges and method of producing said intermediate product

1. An intermediate product for producing a plurality of pre-filled dual-chamber syringes or cartridges, comprising:

a support template comprising an array of support seats;

a plurality of partially pre-filled tubular containment bodies, each of the tubular containment bodies being inserted in a respective support seat, each of the tubular containment bodies extending between a first opening and a second opening;

a sterile package inside which the support template and the plurality of tubular containment bodies are enclosed in sterile manner; the sterile package comprising:

a containment tray, the support template being accommodated inside the containment tray, the containment tray comprising an opening rim in which the sterile package comprises a closure film fastened flush to said rim and resting on an end portion of said tubular containment bodies:

a first sterile pouch containing the containment tray;

wherein the tubular containment bodies comprise in the interior thereof:

a first stopper and a second stopper arranged to define therebetween in the tubular containment body a first containment chamber and adapted to slide inside the tubular containment body;

a first liquid substance contained inside the first containment chamber;

wherein the first stopper is spaced from the first opening to define between the first stopper and the first opening a second containment chamber, the second containment chamber being empty and adapted to be filled with a second substance to be mixed inside the containment body with said first liquid substance in order to reconstitute an injectable solution.

2. An intermediate product according to claim 1 , wherein:

the first stopper comprises at least one bypass channel; or

the containment body comprises an internal wall equipped with a recess adapted to define a bypass channel, and the recess is located between the first stopper and the first opening.

3. An intermediate product according to claim 1 , wherein the tubular containment body is made in a single piece.

4. An intermediate product according to claim 1 , wherein the second stopper comprises a fastening element adapted to fasten a plunger to the second stopper such that the second stopper can slide inside the containment body under action of the plunger.

5. An intermediate product according to claim 1 , wherein the package comprises a second sterile pouch which encloses the first sterile pouch.

6. A production method for an intermediate product for producing a plurality of pre-filled dual-chamber syringes or cartridges, comprising in sequence the steps of:

providing a starting product comprising a support template comprising an array of support seats, the starting product comprising a plurality of tubular containment bodies each of the tubular containment bodies being inserted in a respective support seat, each of the tubular containment bodies extending along a vertical axis between a first opening and a second opening, the containment bodies comprising a first stopper inserted inside the containment body between the first opening and the second opening, the second opening being located at a higher level relative to the first opening;

dosing a first liquid substance through the second opening;

inserting a second stopper through the second opening to define a first containment chamber of the first liquid substance between the first stopper and the second stopper;

enclosing the support template and said plurality of tubular containment bodies inside a sterile package;

wherein the sterile package comprises a containment tray, and wherein the step of enclosing the support template comprises a step of inserting the template inside the containment tray and of closing the containment tray; and

wherein the containment tray comprises an opening rim and wherein the step of closing said containment tray comprises a step of fastening a closure film flush with the rim.

7. A production method according to claim 6 , wherein the enclosing step comprises a step of enclosing the containment tray inside a sterile pouch.

8. A production method according to claim 7 , wherein the enclosing step comprises a step of enclosing the first sterile pouch in a second sterile pouch.

9. A production method according to claim 6 , wherein the starting product comprises said containment tray, wherein the support template is contained in the containment tray in the starting product, and wherein the method comprises, before the dosing step, a step of extracting the support template from the containment tray.

10. A production method according to claim 6 , wherein between the dosing step and the inserting step, the method is free of a lyophilization step.