Terumo Kabushiki Kaisha

Tetsuya Oyauchi

Daisuke Nishiuchi

Hideo Kawamoto

Koji Nakamura

Takeshi Akiyama

Shigeru Tamatsukuri

Ayumi Kumagai

A medical puncture needle includes an end portion including a needle tip; and a main body portion contiguous with the end portion, having a substantially circular cross-sectional outer shape. The end portion includes a first bevel formed by a curved surface, the bevel having an angle that gradually decreases toward the needle tip in an axial direction, in a cross-section orthogonal to the axial direction, relative to an imaginary plane that extends along an axis of the main body portion.

Medical puncture needle and method of manufacturing puncture 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

Objects are to ensure a required depressing force and puncture speed when a needle tube is punctured in the skin, and to be able to reliably situate a needle tip of a needle tube in the upper layer of skin. A needle injection assemblyincludes a needle tubehaving a needle tipthat can be punctured in a living body, a hubthat holds the needle tube, an adjustment section, a stabilizing section, and a puncture speed securing member. The adjustment sectionis provided around the periphery of the needle tubeand has a needle projection surface, from which the needle tipof the needle tubeprojects. The stabilizing sectionextends from the hub, is disposed to surround the needle tubeand has an end facethat comes in contact with the skin when the needle tubeis punctured in the living body. The puncture speed securing member is provided at the adjustment sectionor stabilizing sectionsuch that the puncture speed securing member moves along the axial direction of the needle tube. The puncture speed securing memberis brought into contact with the skin ahead of the needle tipof the needle tubewhen the needle tubeis punctured in the living body and ensures the speed and depressing force as desired when the needle tubeis punctured in the living body.

Growing community of inventors

Isehara, Japan

Tetsuya Oyauchi