| 摘要 |
<p>A biopsy device, that includes a cylindrical outer cannula (2) with a proximal end and a distal end, has a handle (3) in the region of its proximal end (2a) and a cutting rim in the region of its distal end (2b). An intermediate cannula (4), with a proximal end and a distal end, is disposed inside the outer cannula (2). The proximal end of the intermediate cannula (4) is fixed to the proximal end of the outer cannula (2). The distal end of the intermediate cannula (4) is provided with elastic resection means (6,116) having their free ends bent inward, when they are in non-operation condition. An inner cannula (7), of smaller thickness, is slidably located inside the intermediate cannula (4). The inner cannula (7) can be moved axially with respect to the intermediate and outer cannulas between an advanced position, in which said inner cannula (7) pushes the resection means (6) keeping their free ends open, and a retracted position, in which these resection means are released, and the free ends of the are bent elastically.</p> |
