Abstract: An improved snare cauterization instrument assembly is provided with a plurality of fixed connecting strands that severably join the web member to the cauterization loop to prevent the undesired movement of the web to the distal end of the loop prior to electrical activation and severing of the tissue sample. A method of manufacturing the assembly employs a resilient, flexible catheter as a tool to facilitate the placement of the web member on the loop.

Abstract: A surgical instrument assembly for use in snare cauterization operations includes a tubular sheath member, a cauterization loop, and a wire operatively connected to the loop, the wire passing longitudinally through the sheath. An electrical supply is connected to the wire for feeding an electrical current to the loop, while an actuatable shifter is connected to the wire for sliding the wire along the sheath. A flexible web member is removably attached to the loop to form a capture pocket. During use the loop is passed over a polyp to be removed so that the web member substantially surrounds the polyp. The loop is then closed to engage the polyp around a base region thereof and an electrical current is conducted through the loop to burn through the polyp at the base region. The severed polyp is automatically captured by the web member.