| 摘要 |
A biopsy device comprising a body, a mandrel provided with housing intended to receive a sample of organic tissue, a concentric hollow needle outside the mandrel, said mandrel and said hollow needle being slidingly coupled with said body and being movable in a direction parallel to the respective longitudinal axes between a respective proximal position and a respective distal position, a distal portion of said mandrel and of said hollow needle protruding outside said body; the biopsy device further comprises a concentric cannula outside said hollow needle, said cannula having sufficient length to cover completely said distal portion of said mandrel and said distal portion of hollow needle when the mandrel and the hollow needle are in a preset intermediate position between said distal position and said proximal position. |
