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US 12,138,434 B2Granted
Puncture needle and catheter assembly
AssigneeTerumo Kabushiki Kaisha
InventorsTakehiko Ueda, Masahiko Nagasawa
Life of this patent
Estimating the term…
Abstract
A puncture needle for medical use includes: a main body that is rod-shaped and that comprises a distal end portion comprising a blade surface. The blade surface includes: a first blade surface portion that extends so as to incline with respect to a central axis of the main body, and a second blade surface portion that is formed on a back side of the first blade surface. A blade edge having a needle tip at one end is formed by a ridge line where the first blade surface portion meets the second blade surface portion. The first blade surface portion is constituted by a concave surface that is concave in a side view of the main body.
Claims16
A puncture needle for medical use, the puncture needle comprising:
- a main body that is rod-shaped and that comprises a distal end portion comprising a blade surface,
- wherein the blade surface comprises:
- a first blade surface portion that extends so as to incline with respect to a central axis of the main body, and
- a second blade surface portion that is formed on a back side of the first blade surface portion,
- wherein a blade edge having a needle tip at one end is formed by a ridge line where the first blade surface portion meets the second blade surface portion,
- wherein the first blade surface portion is constituted by a concave surface that is concave in a side view of the main body, and
- wherein the blade edge forms a concave shape in a front view of the main body as seen from a first blade surface portion side.
4 more elements
A puncture needle for medical use, the puncture needle comprising:
- a main body that comprises a distal end portion comprising a blade surface,
- wherein the blade surface comprises:
- a first blade surface portion having at least a region that extends so as to incline with respect to a central axis of the main body, and
- a second blade surface portion that is formed on a back side of the first blade surface portion,
- wherein a blade edge having a needle tip at one end is formed by a ridge line where the first blade surface portion meets the second blade surface portion,
- wherein the blade edge has a distal-side blade edge that is straight and a proximal-side blade edge that is straight and located proximal of the distal-side blade edge, and
- wherein, in a front view of the main body as seen from a first blade surface portion side, the distal-side blade edge and the proximal-side blade edge form a concave shape.
4 more elements
A puncture needle for medical use, the puncture needle comprising:
- a main body that comprises a distal end portion comprising a blade surface,
- wherein the blade surface comprises:
- a first blade surface portion having at least a region that extends so as to incline with respect to a central axis of the main body, and
- a second blade surface portion that is formed on a back side of the first blade surface portion,
- wherein a blade edge having a needle tip at one end is formed by a ridge line where the first blade surface portion meets the second blade surface portion,
- wherein the first blade surface portion comprises a distal-side blade surface portion that is flat and that includes the needle tip, and a proximal-side blade surface portion that is flat, is inclined more than the distal-side blade surface portion with respect to the central axis, and is located proximal of the distal-side blade surface portion, and
- wherein the second blade surface portion extends across both a back side of the distal-side blade surface portion and a back side of the proximal-side blade surface portion.
4 more elements
A puncture needle for medical use, the puncture needle comprising:
- a main body that comprises a distal end portion comprising a blade surface,
- wherein the blade surface comprises:
- a first blade surface portion having at least a region that extends so as to incline with respect to a central axis of the main body, and
- a second blade surface portion that is formed on a back side of the first blade surface portion,
- wherein a blade edge having a needle tip at one end is formed by a ridge line where the first blade surface portion meets the second blade surface portion,
- wherein the first blade surface portion comprises a distal-side blade surface portion that is flat and that includes the needle tip, and a proximal-side blade surface portion that is flat, is inclined more than the distal-side blade surface portion with respect to the central axis, and is located proximal of the distal-side blade surface portion,
- wherein the blade edge comprises a distal-side blade edge that is straight and is formed by a ridge line where the distal-side blade surface portion of the first blade surface portion meets the second blade surface portion, and a proximal-side blade edge that is straight and is formed by a ridge line where the proximal-side blade surface portion of the first blade surface portion meets the second blade surface portion, and
- wherein the distal-side blade edge and the proximal-side blade edge form a concave shape in a front view when the main body is viewed from a first blade surface portion side.
5 more elements
Dependencies are inferred from the claim text.