| 摘要 |
A surgical snare instrument includes a tubular sheath (12), a flexible shaft (18) extending through, and axially movable relative to the sheath (12); a snare loop (24) at the distal end of the shaft; and a handle assembly (26) coupled to the proximal end of the sheath, and shaft for moving the shaft (18) axially relative to the sheath (12). The handle assembly (26) is provided with a cautery capability (28) to provide a cautery current to the snare loop (24). The snare loop (24) is trained to have a proximal portion (38) which extends along an angle or curve relative to the tubular member, and a distal portion (40) which is substantially parallel to the tubular member. When the snare loop (24) is moved beyond the distal end of the sheath (12), the polyp-engaging distal portion (40) of the snare loop is oriented substantially parallel, yet non-axial, with the tubular member (12).
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