Puncture needle and puncture device
First Claim
1. A puncture needle constituted of a resin material, the puncture needle comprising:
- an elongated main body having a sharp needlepoint at a distal end thereof; and
at least three cutting parts provided so as to project from the elongated main body to a direction perpendicular to a central axis of the elongated main body, extending along the central axis, and arranged around the central axis,wherein each of the at least three cutting parts has a distal portion and a proximal side with respect to the distal portion, and both side surfaces of at least a part of the proximal side are curved in an outward direction with respect to the cutting part and convexly curved with respect to the central axis, andwherein adjacent cutting parts in the at least three cutting parts are arranged so as to be disposed in different positions with respect to the central axis, so that the adjacent cutting parts make an incision on a biological surface in a time difference.
1 Assignment
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Accused Products
Abstract
A puncture needle is constituted of a resin material. The puncture needle comprises: an elongated main body having a sharp needlepoint at a distal end thereof; and at least three cutting parts provided so as to project from the elongated main body to a direction perpendicular to a central axis of the elongated main body, extending along the central axis, and arranged around the central axis. Adjacent cutting parts in the three cutting parts are arranged so as to shift to each other in a direction of the central axis, so that the adjacent cutting parts make an incision on a biological surface in a time difference. Further, a height of a distal portion of each cutting part from the central axis is gradually decreased toward a distal direction.
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Citations
7 Claims
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1. A puncture needle constituted of a resin material, the puncture needle comprising:
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an elongated main body having a sharp needlepoint at a distal end thereof; and at least three cutting parts provided so as to project from the elongated main body to a direction perpendicular to a central axis of the elongated main body, extending along the central axis, and arranged around the central axis, wherein each of the at least three cutting parts has a distal portion and a proximal side with respect to the distal portion, and both side surfaces of at least a part of the proximal side are curved in an outward direction with respect to the cutting part and convexly curved with respect to the central axis, and wherein adjacent cutting parts in the at least three cutting parts are arranged so as to be disposed in different positions with respect to the central axis, so that the adjacent cutting parts make an incision on a biological surface in a time difference. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification