| 摘要 |
<p>A tissue retrieval apparatus for laparoscopic procedures includes a longitudinally extending cannula (112) having a tip end (101) insertible into a patient. The tip end (101) is formed to be radially expandable in response to withdrawal of tissue into the tip end (101) of the cannula (112). Tissue can be moved into the tip end (101) of the cannula (112) by using graspers or other devices that can be extended to engage and hold tissue. To reduce the possibility of contamination of healthy tissue, an elastic sheath (109) is attached to cover the tip end (101). The elastic sheath (109) is formed to radially expand in response to radial expansion of the tip end (101) of the cannula (112) during movement of tissue into the tip end (101). To further reduce the possibility of contamination of healthy tissue, a drawstring (182) is provided to close the elastic sheath (109) and thereby seal the tip end (101). After tissue has been moved into the tip end (101), the drawstring (182) is pulled to close the elastic sheath (109) and seal the tip end (101) of the cannula (112).</p> |
