Medical puncture needle and method for manufacturing puncture needle
AssigneeTerumo Kabushiki Kaisha
InventorTakehiko Ueda
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Abstract
A medical puncture needle includes a rod-shaped main body portion; and a blade surface formed at a distal end portion of the main body portion. The blade surface includes a first blade surface portion and a second blade surface portion that intersect to form a blade edge. A needle tip is formed at a location at which a distal end of the blade edge intersects a first ridge line at an outer edge of the first blade surface and a second ridge line at an outer edge of the second blade surface. At least one of the blade surface portions is planar, and, in a central axis direction of the main body portion, said at least one blade surface portion extends to a location proximal of a middle position of a blade surface region in which the blade surface is formed.
Claims5
A medical puncture needle comprising:
- a rod-shaped main body portion;
- and
- a blade surface formed at a distal end portion of the main body portion, wherein the blade surface comprises:
- a first blade surface portion, and a second blade surface portion that intersect to form a blade edge, wherein a needle tip is formed at a location at which a distal end of the blade edge intersects a first ridge line at an outer edge of the first blade surface portion and a second ridge line at an outer edge of the second blade surface portion, and wherein at least one blade surface portion among the first blade surface portion and the second blade surface portion is planar, and, in a central axis direction of the main body portion, said at least one blade surface portion extends to a location proximal of a middle position of the blade surface,
- a third blade surface portion that forms a proximal portion of the blade surface, and
- a plurality of planar connecting blade surface portions located between said at least one blade surface portion and the third blade surface portion, wherein each connecting blade surface portion is continuous with an adjacent connecting blade surface portion with a respective ridge line at a boundary therebetween.
Dependencies are inferred from the claim text.