| 摘要 |
A blood sampling device (10) is provided with a housing, a lancet assembly (30), a lancet holder (36) which is movable in a lancing direction between a cocked po sition and a puncture position, and an actuator mechanism disposed in the housing for causing the lancet holder (36) to move from the cocked position to the puncture position. The lancet assembly (30) has a lancet with a sharp tip, a lancet body (32) having at least two angularly spaced ribs which extend outwardly from a central portion of the lancet body (32), and a protective cap (94) covering the sharp tip of the lancet, the protective cap (94) being attached to the lancet body (32) so that the prote ctive cap (94) is twistably removable from the lancet body (32). The lancet holder (36) ha s an aperture formed therein, the aperture having a cylindrical shape and being subst antially unobstructed so that the lancet body (32) may be inserted into the aperture in a ny angular orientation relative to the lancet holder (36), and the blood sampling d evice includes a mechanism for preventing significant rotational movement of the lance t body (32) relative to the lancet holder (36) when the lancet body (32) is disposed in the aperture formed in the lancet holder (36) and when the protective cap (94) is su bject to an angular force sufficient to twist the protective cap (94) off of the lancet b ody (32). The cylindrical aperture formed in the lancet holder (36) may be defined by a pl urality of curved interior surfaces (98), and the preventing mechanism may be provided as a plurality of grooves formed in the lancet holder (36), each of the grooves separ ating an adjacent pair of the curved interior surfaces (98). |
