| 摘要 |
<p>A surgical snare device for use in polypectomy procedures includes a snare loop capable of being deployed with a plurality of precise internal diameters. The device includes a handle with first and second handle assemblies and a collar. The first handle assembly has multiple numerical markings on a side. The second handle assembly is slidable along the first handle assembly to deploy the snare loop from an elongate tubular sheath attached to the distal end of the first handle assembly. When the second handle assembly is slid to a position such that it aligns with one of the numerical markings on the first handle assembly, the snare loop will be deployed with an internal diameter in millimeters that corresponds precisely to the numerical marking. For example, sliding the second handle assembly to a ' 10' marking will deploy a snare loop having an internal diameter of 10 mm. The collar is positioned just distal to the second handle assembly and is also slidable along the first handle assembly. The collar functions as a depth stop and prevents further distal movement of the second handle assembly.</p> |
