Terumo Kabushiki Kaisha

Fumiya Matsumoto

Hitoshi Okihara

Masafumi Takemoto

A gasket pressing tool includes a syringe attachment member attached to an outer tube, a gasket pressing member that presses a gasket of a syringe, a pressing member biasing body accommodated in the gasket pressing member, a biasing body pressing tubular member that accommodates a rear end portion of the pressing member biasing body and has side portions provided with opening portions, and movement restriction members of the pressing member held by the tubular member and having engagement protrusions that enter through the opening portions of the tubular member. The pressing tool has an engaged state maintaining function for the engagement protrusion of the movement restriction member and the pressing member-side engagement portion of the pressing member, and an operation function for the engagement protrusion for releasing the engagement therebetween.

Gasket pressing tool and drug administration tool using the same

A prefilled syringe includes a barrel body, a gasket that seals a proximal end side of a medicine chamber of the barrel body, and a cap that is attached to a tip and seals a distal end side of the medicine chamber. The cap includes a surface area increasing member that extends to the proximal end side, is inserted into a flow path of the tip, and protrudes to the medicine chamber to increase a surface area of a medicine solidified in a lump in the medicine chamber.

Prefilled syringe, syringe assembly, method for manufacturing prefilled syringe, and method for increasing surface area

A needle-equipped outer cylinder includes: a needle tube; a joining member comprising: a needle tube accommodation hole that accommodates a proximal end side portion of the needle tube and penetrates the joining member from a distal end of the joining member to a proximal end of the joining member, and a joining outer peripheral portion provided on an outer peripheral portion of the needle tube accommodation hole; and an outer cylinder member comprising: a distal end joint that comprises an inner cavity that receives the joining outer peripheral portion of the joining member from a distal end side, and a projection located at a proximal end portion of the inner cavity and projecting into the inner cavity. The joining member comprises, at a proximal end portion of the joining member, an abutment portion that abuts the projection of the outer cylinder member.

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Shizuoka, Japan

Fumiya Matsumoto