| 摘要 |
<p>An indwelling needle assembly (1) having an outer needle (2) to be pierced and retained in tissue of a living body, an outer needle hub (3) to which the outer needle is fixed, an inner needle (4) slidably inserted in a lumen of the outer needle and having a sharp blade edge (41), an inner needle hub (5) to which the inner needle is fixed, and a needle guard (6) having a multi-tube structure composed of a plurality of tubes (61, 62) and capable of accommodating the inner needle and the inner needle hub therein. The assembly has a first elastic body (71) provided in the needle guard (6) for withdrawing the tubes (61, 62), a second elastic body (72) that engages with the inner needle hub (5) and biases the hub toward the proximal end of the guard (6), and a stopper (8, 81) that holds the inner needle hub (5) and the needle guard (6) against biasing forces of the elastic bodies (71, 72). <IMAGE></p> |
