To ensure that there is no misconnection between a needle, such as for example a spinal or epidural needle, and the appropriate medication, the needle hub the needle is formed, . by molding or extrusion, to have a given configuration. An adapter is placed between the needle and a conventional fluid store, or medical line. The end of the adapter that connects to the needle assembly is formed to have a configuration that is complementary to that of the hub of the needle assembly, so that the adapter and the needle hub may be readily mated to each other. The other end of the adapter is formed to have another configuration, for example a conventional luer, that is readily connectable to a conventional fluid store, such as a syringe that has a conventional luer. The adapter is formed by inter-fitting two elements to effect an integral locking mechanism to prevent the uncoupling of the fluid store and the adapter, once they are securely coupled. By thus configuring the hub of the needle to have a given configuration that is matable only to the end of an adapter that has a complementary configuration, and further providing an adapter that prevents the removal of the fluid store connected thereto, the potential for mis- connecting the needle to a fluid store that contains a different medicament is greatly reduced, if not totally eliminated.Linvention vise à sassurer quil nexiste aucun défaut de raccordement entre une aiguille, comme par exemple une aiguille spinale ou épidurale, et la médication appropriée. A cet effet, le pavillon de laiguille est formé, par moulage ou extrusion, de façon à présenter une configuration donnée. Un adaptateur est placé entre laiguille et une source de fluide conventionnelle ou un conduit médical. Lextrémité de ladaptateur qui est reliée à lensemble aiguille est formée de façon à présenter une configuration complémentaire à celle du pavillon de lensemble aiguille, de sorte que ladaptateur et le pavillon de laiguille peuvent aisément être accou
