| 摘要 |
<p>An improved, cone shaped puncturing/cutting tip (25) is provided for the inner cannula (12) or stylet of a biopsy needle. The cone shaped tip is defined by a frontal vertex co-incident with the center of the cannula or the stylet and a circular base (36) of diameter about equal that of the cannula or stylet. The surface of the cone shaped tip end includes at least three circumferentially spaced, longitudinally extending cutting vane edges (40) extending from the vertex to the base.</p> |
