Patent ID: 8864737

Claim:
A drug solution preparing kit comprising a drug solution-filled syringe and a transfusing tool, wherein said drug solution-filled syringe includes a cylinder-shaped barrel of which a tip end and a base end are open, a sealing member which seals said tip end and can not be removed from said tip end, and a plunger which is inserted into said barrel in a liquid-tight manner and a slidable manner, said barrel, said plunger and said sealing member define a space filled with a drug solution, and said transfusing tool includes a barrel attaching part to which said barrel can be attached, a first needle which is provided on said barrel attaching part and can penetrate through said sealing member, a second needle which can penetrate through a plug body of an infusion container, an outlet port which is blocked with a blocking member through which a bottle needle of an infusion line can penetrate, a first communication channel which establishes communicative connection between said first needle and said second needle, a second communication channel which establishes communicative connection between said second needle and said outlet port and is formed independently of said first communication channel, a covering member which covers said first needle such that said first communication channel is open only when said barrel is attached to said barrel attaching part, and a one-way valve which is provided on said first communication channel and allows only a fluid flowing from a direction of a tip end of the first needle to pass therethrough in an irreversible manner.