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Surgical instruments designed to push knot loops onto a body structure for a secure tie, usually with negligible pressure. These passers are typically long, slender, manual, handheld instruments with the operative end configured as one or more moving curved hooks; the instruments may also include a dissecting tip at the proximal end to clear the path to the ligature site. Ligature passer/knot tier instruments are used mainly for placing a ligature around a vessel or over a clamp in procedures in which manipulative space is limited.
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