Liquid transfer device for medical dispensing containers
A kit comprising a medical dispensing container ( 402 ), such as a vial for diagnostic agents, and a liquid transfer device ( 401 ) to be used to transfer a liquid into or from said dispensing container. The transfer device allows substantially limiting the gaseous exchange between the inside of a vial and the external ambient, when the device is connected to the vial in steady state conditions.
1. Pharmaceutical kit for the preparation of a medicament comprising:
a) a medical dispensing container defining an inner space and containing a physiologically acceptable gas therein, and
b) a liquid transfer device, which cooperates with said container for transferring a liquid into or from said container, said device comprising a first conduit and a second conduit said first and said second conduit allowing a fluid contact between the inner space and an external ambient when said device cooperates with said container, wherein:
said second conduit has (i) a first portion which is substantially parallel to said first conduit and (ii) a second portion which has a plurality of turns around an axis and is in communication with said external ambient;
when said device cooperates with the container during a liquid flow into or from said dispensing container, said liquid flow is effected through said first conduit while said second conduit allows a free gaseous flow between said container and an external ambient; and
when said device cooperates with the container in steady state conditions, less than 20% (v/v) of the total volume of gas contained in said container is exchanged with the external ambient over a period of 6 hours;
said second conduit having a length (l) and a diameter (d) such that the ratio l/d is between about 86 and about 600 and being substantially devoid of means for interrupting the flow of gas between said container and the external ambient.
2. A kit according to claim 1 , wherein said container further contains a precursor of a suspension of gas-filled microvesicles in the form of a dry deposit.
3. A kit according to claim 1 , wherein less than 10% (v/v) of said gas is exchanged.
4. A kit according to claim 1 , wherein less than 5% v/v) of said gas is exchanged.
5. A kit according to claim 1 , wherein, when said transfer device cooperates with the container during a liquid flow into or from said container, said inner space of the container is subjected to a differential pressure with respect to the external ambient of less than about 300 mbar.
6. A kit according to claim 5 wherein said differential pressure is less than 200 mbar.
7. A kit according to claim 5 , wherein said differential pressure is less than 100 bar.
8. A kit according to any one of claim 1 , 2 or 5 , wherein said second conduit comprises filtering means for protecting the content of the container against microbial contamination during liquid withdrawal.
9. A kit according to claim 8 , wherein said filtering means comprise a hydrophobic filter.
10. A kit according to any one of claim 1 , 2 or 5 , wherein said first conduit of the transfer device comprises connecting means for connecting the transfer device with an external device containing the liquid to be transferred.
11. A kit according to claim 10 , characterized in that said connecting means comprise a luer connector.
12. A kit according to any one of claims 1 or 5 , wherein said second conduit of said transfer device has a diameter of less than 0.7 mm.
13. A kit according claim 12 , wherein said diameter is less than 0.5 mm.
14. A kit according claim 12 , wherein said diameter is less than 0.4 mm.
15. A kit according to any one of claim 1 or 5 , wherein said second conduit of said transfer device has a length of from about 2.5 mm to about 400 mm.
16. A kit according to claim 15 , wherein said length is from about 5 mm to about 250 mm.
17. A kit according to claim 15 , wherein said length is from about 10 mm to about 150 mm.
18. A kit according to claim 1 , wherein said ratio lid is between 86 and 500.
19. A kit according to claim 18 , wherein said ratio lid is between 150 and 400.
20. A kit according to any one of claim 1 or 5 , wherein said first conduit comprises shutter means for closing said conduit when a fluid injector is removed.
21. A kit according to any one of claim 1 or 2 , further comprising a syringe pre-filled with a saline solution.
22. A kit according to any one of claim 1 or 2 , wherein said physiologically acceptable gas is a diagnostically and/or therapeutically effective agent.