| 摘要 |
Endoscopic biopsy forceps jaws (14) having an outer edge (33, 333, 433, 633, 833) which may be generally U-shaped, circular, or oblate circular are disclosed with a number of teeth (40-51, 240-250, 440-454, 540-533, 740-753) which extend along at least a portion of the outer edge where the peaks of the teeth are located upward and inward from the outer edge. In one embodiment, each tooth is defined by a substantially triangular inner surface (T), a substantially quadrilateral base (L1-L4), and a surface which extends outward and downward from the vertex of the triangular surface to the outer edge of the jaw. Valleys (40V-51V, 240V-250V, 440V-454V) between the teeth have two inclined surfaces which intersect along a line which extends inward and downward from the outer edge of the jaw. In a second embodiment, the peak of each tooth is defined by the vertex of a pyramid having four faces (T1-T4) and valleys between these teeth have three substantially flat surfaces (V1-V3) which intersect at a vertex (V4) which lies downward and inward from the outer edge of the jaw. Alternate embodiments of both the first and second embodiment of the jaws include providing a lip (133L, 333L, 833L) around the outer portion of the outer edge so that the teeth and valleys are spaced farther in from the outer surface of the jaw cup.
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