| 摘要 |
An indwelling needle 1 is constituted by a body 3 having a closed end, a needle 4 with which a sharp edge 4 a is formed at the tip, a tubular hub 5 retaining the proximal end of the needle 4 while sliding along the main body 3 , a protective cover 6 sliding along the main body 3 while projecting from the main body 3 in a left direction of the drawings, and a spring 7 elastically fitted between the body and the protective cover. When a first projection 23 b is lifted by operating an actuating lever 23 provided on the body to be retracted along with the protective cover relative to the body, the first projection 23 b is housed in a through hole 14 and presses a second projection 31 of the protective cover engaged with a second engaging portion 13 b toward the inner circumference, so that a use state of the protective cover and the body is released and the protective cover is projected from the body by elastic force of the spring. The total length of the indwelling needle 1 in the use state can be shortened, inhibiting damage to a blood vessel or the like.
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