| 摘要 |
An improved surgical needle of the type having one or more cutting edges converging towards the needle tip and formed by the intersection of a plurality of planar surfaces, for use in cutting through hard body tissue material. The forward end of the needle has one or more smaller additional cutting edges located at the tip to aid initial insertion into the tissue. These additional cutting edges are formed by at least two additional intersecting planar surfaces at the tip portion. The needle is preferably curved in the reference plane defined by one of the cutting edges and the axis of the needle.
|
