To ensure that there is no misconnection between a needle and a connector that feeds the appropriate medication to the needle, the needle hub of the needle is formed to have an end with a given configuration that allows the end to be connected only to an end connector that has a configuration complementary to the given configuration. An adapter that has a first end that has a configuration complementary to the given configuration and a second end connectable to a luer of a conventional fluid store or fluid line has its first end connected to the end of the needle hub and its second end connected to the luer of the fluid store or line that carries the appropriate medication so that the appropriate medication is ensured to be fed to the needle. The adapter has a locking mechanism to prevent the adapter and the fluid store or line from uncoupling from each other.為了確保針頭以及饋給正確藥物至該針頭的連接器之間不會有錯誤的連接,該針頭之針座係形成以包含具有一既定結構的一末端,該既定結構允許該末端僅可連接至具有匹配於該既定結構之構造的一終端連接器。一轉接器包含一第一末端與一第二末端,該第一末端具有匹配於該既定結構之構造,且該第二末端係可連接於一習知流體儲存器或流體管路的路厄端。該轉接器的該第一末端連接至該針座的該末端,且該第二末端連接至運送正確藥物之流體儲存器或管路的路厄端,以使得該正確藥物可確保被饋給至該針頭。該轉接器具有一鎖固機構以防止該轉接器與該流體儲存器或管路彼此分離。2‧‧‧注射針組件4‧‧‧針座6‧‧‧接收端8‧‧‧封閉端10‧‧‧針頭12‧‧‧凸緣14‧‧‧長形圓筒部16a‧‧‧突出部16b‧‧‧突出部18‧‧‧開口20‧‧‧轉接器24‧‧‧接收端26‧‧‧路厄端28‧‧‧注射針30‧‧‧螺蚊線
