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The snare shown in the accompanying illustration consists of a large and a small tube and a handle set at a right angle to the tubes. The small tube is attached to the posterior shank of the handle and is inserted within the large tube, which is attached to the anterior shank of the handle. A small wheel is attached with the small tube to the posterior shank of the handle. Both tubes are so attached to the shanks that they can move up and down. As the instrument is opened the small inner tube has a tendency to move upward and the large outer tube downward, but both working together make a tube which moves neither up nor down.
The wire sling, instead of being fixed to the small inner tube as in other snares, goes entirely through both tubes, around the small wheel at the posterior end of
Simpson WL. A NEW TONSIL-SNARE. JAMA. 1912;LIX(26):2313. doi:10.1001/jama.1912.04270130018007
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