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    • 2. 发明授权
    • Tetherless biopsy device with self-reversing cutter drive mechanism
    • 无切换活检装置,具有自反向切刀驱动机构
    • US08672860B2
    • 2014-03-18
    • US12467365
    • 2009-05-18
    • Kyle P. MooreHaresh D. PatilMichael J. AndreykoShailendra K. PariharEric B. Smith
    • Kyle P. MooreHaresh D. PatilMichael J. AndreykoShailendra K. PariharEric B. Smith
    • A61B5/00
    • A61B10/0266A61B10/0275A61B10/0283A61B2010/0208
    • A biopsy device comprises a body, a needle, and a cutter. A self-reversing cutter translation mechanism translates the cutter proximally and distally in response to rotation of the cutter in a single rotational direction. The cutter translation mechanism comprises a lead screw with discretely formed threads and a rotatable pawl. The cutter is translated proximally when the pawl is in a first rotational orientation; and distally when the pawl is in a second rotational orientation. Resilient members cause the pawl to be rotated between the first and second rotational orientations when the cutter reaches a distal position and a proximal position. A vacuum draws severed tissue samples through the interior of the cutter to deposit the samples in a holder. The translation mechanism engages a valve mechanism to provide simultaneous venting to part of the needle and reversal of the pawl orientation when the cutter reaches a distal position.
    • 活检装置包括主体,针和切割器。 自动反转刀具平移机构可以根据切割器在单个旋转方向上的旋转而向近端和远端地转动刀具。 切割平移机构包括具有离散形成的螺纹的导螺杆和可旋转的棘爪。 当棘爪处于第一旋转取向时,切割器向近侧平移; 并且当棘爪处于第二旋转取向时向远侧方向移动。 当切割器到达远侧位置和近端位置时,弹性构件使棘爪在第一和第二旋转取向之间旋转。 真空通过切割器的内部抽取分离的组织样品以将样品沉积在支架中。 平移机构接合阀机构,以在切割器到达远端位置时同时排出针头的一部分并反转棘爪取向。