Flexible package with a sealed sterile chamber for the reconsitution and administration of fluid medicinal or nutritional substances instillable into the body of a patient

1. A package for infusion or instillation of medicinal or nutritional products into the body of a patient, comprising a bag of liquid diluent equipped with at least one drain tube, and a mixing tube equipped with an openable closure and with a coupling and perforation device for a bottle of a pharmacological or nutritional substance in powder, gel or other material, the bottle is provided with a perforatable cap, said package comprising at least a flexible airtight sterile casing, containing said bottle of the substance and said coupling and perforation device, said bottle being housed in the casing in a coupling position only with the coupling and perforation device and being manually manoeuvrable from the outside of the casing up to a perforating position of said cap through said coupling and perforation device, wherein said coupling and perforation device comprises a first element slidably coupled with a second element and movable between said coupling position of the bottle and said perforating position of the cap of the bottle, in which said first element comprises a ring from which at least two flaps equipped with notches suitable to accommodate the bottle in the coupling position, vertically branch off, and in that said openable closure is surmounted by a circular base from which pairs of further flaps, in turn equipped with notches suitable to accommodate the bottle in the perforating position of the cap, perimetrally and vertically side by sidebranch off, said second element having gaps between said pairs of further flaps in correspondence of said at least two flaps, said gaps being suitable to accommodate the at least two flaps with the bottle in the perforating position of the cap.

2. The package according to claim 1 , wherein said ring is inserted externally to said further flaps and is configured to slide coaxially with respect to the circular base, and that said further flaps have a curvature at their free ends such as to constitute a first limit to said first element in correspondence of the bottle in the coupling position, and said notches are configured to contrast with said base circular and form a second limit to said first element in correspondence of the bottle in the position of perforation of the cap.

3. The package according to claim 1 , wherein said further flaps of the second element comprise externally locking notches suitable to lock the first element in coupling position of the bottle.

4. The package according to claim 1 , wherein said openable closure of the mixing tube has internally a channel ending at the top with a hollow tip and inferiorly with an initial portion which is frangible to allow passage of the pharmacological or nutritional substance from the bottle, through the mixing tube towards the bag of liquid diluent.

5. The package according to claim 1 , wherein said casing is arranged in a position aligned with said bag of liquid diluent so as to be hermetically separated by a single wall, said mixing tube being configured to extend through said single wall for the communication between said bottle and said bag in order to introduce inside the bag the pharmacological or nutritional substance contained within the bottle.

6. The package according to claim 1 , wherein said bag of liquid diluent is provided with a supply tube.

7. The package according to claim 1 , wherein said casing comprises internally said bag of liquid diluent with said drain tube and said mixing tube equipped with the coupling and perforation device and the bottle.