| 摘要 |
A needle assembly comprises an injection needle and a needle hub, mountable on a syringe, for securing the injection needle. The needle has an injection part extending axially from the hub and terminating in a skin-piercing, obliquely cut end. The length of the injection part is between 4 and 6 mm, thereby facilitating a proper subcutaneous injection. Also, preferably either (a) the outer diameter of the needle is smaller than 0.320 mm and the bore diameter is larger than 0.165 mm, or (b) the outer diameter is smaller than 0.298 mm and the bore diameter is larger than 0.133 mm. Also, preferably the hub includes an axially extending protrusion, from which the injection part extends, to facilitate insertion of the injection part into the skin of a user at an oblique angle.
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