Terumo Kabushiki Kaisha

Ayumi Kumagai

Hideo Kawamoto

Tetsuya Ooyauchi

Toshihisa Nakamura

Koji Nakamura

Takeshi Akiyama

Eiji Arita

Yukio Imai

Shigeru Tamatsukuri

Tetsuya Oyauchi

Yasushi Nagasawa

Hidenori Fujiwara

Kenta Gotou

Madoka Horie

Takao Uchida

A medical hollow needle assembly includes an outer cylindrical body including a through-hole; a hollow needle having an outer peripheral surface, wherein a proximal portion of the hollow needle is disposed in the through-hole of the outer cylindrical body, and wherein the outer peripheral surface of the hollow needle has an outer reduced-diameter surface that has a smaller outer diameter than that of a more proximal portion of the outer peripheral surface of the hollow needle; and an inner cylindrical body including an insertion hole in which the hollow needle is disposed, wherein the inner cylindrical body is disposed between the hollow needle and an inner peripheral surface of the through-hole of the outer cylindrical body, and wherein the inner cylindrical body joins the outer cylindrical body and the hollow needle.

Medical hollow needle assembly and method of manufacturing hollow needle

A syringe is disclosed, which includes a needle having an outer cylinder including an outer cylinder body part and a needle fixing part provided at a distal end part of the outer cylinder body part; an injection needlehaving a puncturing needle tip at a distal end and fixed to the needle fixing part; and a gasket housed in the outer cylinder. The injection needle is such a tapered part holding injection needle that a puncturing time piercing part having a needle tip has an outer diameter of 0.42 mm or less and has a thickness of 0.1 mm or less, or the injection needle is such a small diameter thin injection needle as to have a thickness of 0.04 mm or less. The gasket includes a gasket body and a soft coating provided on a portion that comes into contact with the inner surface of the outer cylinder.

Syringe with needle, prefilled syringe, and medical liquid administration tool using the same

Growing community of inventors

Gifu, Japan

Ayumi Kumagai