Indwelling catheter assembly and method for manufacturing inner needle
AssigneeTerumo Kabushiki Kaisha
InventorMasahiro ISHIDA
Life of this patent
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Abstract
An indwelling catheter assembly includes: a catheter having a catheter lumen; and an inner needle inserted into the catheter lumen and having a distal end that protrudes from the catheter lumen. The inner needle includes: a bevel, a groove located in a side portion of the inner needle and extending along an axial direction of the inner needle to allow inflow of a fluid, and a protruding portion that is located at a distal end portion of the groove in the axial direction, is continuous with the bevel, and protrudes upward in a depth direction of the groove.
Claims20
An indwelling catheter assembly comprising:
- a catheter having a catheter lumen;
- and
- an inner needle inserted into the catheter lumen and having a distal end that protrudes from the catheter lumen,
- wherein the inner needle comprises:
- a bevel,
- a groove located in a side portion of the inner needle and extending along an axial direction of the inner needle to allow inflow of a fluid, and
- a protruding portion that is located at a distal end portion of the groove in the axial direction, is continuous with the bevel, and protrudes upward in a depth direction of the groove.
A needle for an indwelling catheter assembly, the needle comprising:
- a bevel;
- a groove located in a side portion of the needle and extending along an axial direction of the needle to allow inflow of a fluid;
- and
- a protruding portion that is located at a distal end portion of the groove in the axial direction, is continuous with the bevel, and protrudes upward in a depth direction of the groove.
A method of manufacturing an inner needle to be inserted into a catheter lumen of a catheter in an indwelling catheter assembly, the method comprising:
- a groove forming step comprising:
- forming, in a side portion of a preform that will become the inner needle, a groove extending along an axial direction of the preform to allow inflow of a fluid, and
- forming, at a distal end portion of the groove in the axial direction, a protruding portion continuous with a bevel of the inner needle and protruding upward in a depth direction of the groove.
Dependencies are inferred from the claim text.