| 摘要 |
PROBLEM TO BE SOLVED: To provide a biospy instrument which can keep external damage caused at the time of taking a sample tissue to a minimum and help to obtain a material that keeps microscopic and macroscopic natures of the taken tissue. SOLUTION: The biospy instrument has a tube having a finger-like projection at one end and a cannula slidably disposed in the tube. After insertion of the biospy instrument into a tissue, the tube is displaced on the cannula so that the projection passes through an aperture in the cannula to sever the tissue sample in the cannula bore from the tissue. The projection retains the severed sample in the cannula bore during withdrawal of the biospy instrument from the tissue. A holding and control assembly having a first spring and a second spring is provided for moving the tube and the cannula in a forward direction to penetrate the tissue and then consecutively moving the tube in the forward direction to sever and retain the sample tissue in the cannula bore. COPYRIGHT: (C)2006,JPO&NCIPI
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