| 主权项 |
1. An injection needle comprising:
a needle tube having a proximal end and a distal end; and an edge surface provided at the distal end of the needle tube, the edge surface comprising a first ground facet, a second ground facet, and a third ground facet, wherein the first ground facet is located at a position proximal to the second ground facet and the third ground facet, the second ground facet and the third ground facet converge to form a needle point, the needle point is offset from a central plane that perpendicularly crosses the first ground facet and includes a central axis of the needle tube, a length of the edge surface measured in a central axis direction is in a range of 0.6 to 2.2 mm, an outside diameter of the needle tube is in a range of 0.18 to 0.6 mm, and a ratio of the outside diameter of the needle tube to the length of the edge surface measured in the central axis direction is in a range of 0.265 to 0.325. |
