| 摘要 |
Medical instruments and methods of using the instruments are described. In some embodiments, a medical instrument includes a housing, a stylet having a portion in the housing, a movable first member in the housing, the movable member being connected to the stylet, and a second member located in the housing to reduce movement of the first member. The second member is configured to change movement of the first member from a first direction to a second direction different than the first direction.
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