Handheld biopsy device with needle firing

A biopsy device includes a body, a needle, and a cutter. A motor is operable to both move the cutter relative to the needle and actuate a needle firing assembly to retract and fire the needle relative to the body. The biopsy device also includes a needle rotation assembly that is configured to substantially prevent rotation of the needle about the longitudinal axis when the needle is in a proximal position yet permit rotation of the needle about the longitudinal axis when the needle is in a distal position. A valve assembly of the biopsy device includes a slider that selectively couples a secondary lumen in the needle with either atmospheric air or saline based on the longitudinal position of the slider. The cutter passes through the slider. 一种活检装置，其包括主体、针和切割器。马达可操作来相对于所述针移动所述切割器并且致动针击发组件从而相对于所述主体收回并且击发所述针。所述活检装置还包括针转动组件，其被构造来当所述针处于近侧位置时大致上防止所述针绕所述纵轴的转动，而当所述针处于远侧位置时允许所述针绕所述纵轴的转动。所述活检装置的阀组件包括滑动器，所述滑动器基于所述滑动器的纵向位置而将所述针中的第二管腔与大气或盐水联接。所述切割器行进通过所述滑动器。