Method of attaching a mesh to a coated loop member of a surgical snare device

A retrieval device comprising:

• a snare loop, including:
• a central opening,
• a loop member surrounding the central opening and lying in a plane, wherein a plane of bisection bisects a wire of the loop member into a first side and a second side, wherein the plane of bisection is parallel to the plane in which the wire loop is lying, and
• a layer of material that overlies the loop member, wherein the layer of material includes a first section on the first side of the wire and a second section on the second side of the wire;
• a mesh extending across the central opening of the snare loop, wherein said mesh defines a plurality of pores and has a porosity ranging between 15 and 40 pores per cm2, and wherein each pore is defined by a plurality of sides each consisting of a strand of a plurality of strands of the mesh,
• wherein each of the plurality of strands includes a plurality of openings, wherein each of the plurality of openings is smaller than each of the plurality of pores;
• wherein portions of the plurality of strands are coupled to, and fixed and immovable relative to, the layer of material along an outer periphery of the mesh, wherein the portions of the plurality of strands are only coupled to the first section;
• a sheath, including:
• a lumen,
• a proximal end,
• a distal end, and
• a distal opening, wherein the lumen extends between the proximal end and the distal end, and wherein the lumen is in communication with the distal opening;
• and
• a drive element extending through the lumen of the sheath to the snare loop, wherein movement of the drive element within the lumen of the sheath is configured to:
• move at least a portion of the snare loop, and at least a portion of the mesh, distally out of the distal opening of the sheath, and
• move at least the portion of the snare loop, and at least the portion of the mesh, proximally into the distal opening of the sheath, wherein the portions of the plurality of strands remain stationary relative to the layer of material as the snare loop and the mesh move through the distal opening of the sheath.

A retrieval device comprising:

• a flexible wire loop lying in a plane, wherein a plane of bisection bisects a wire of the wire loop into a first side and a second side, wherein the plane of bisection is parallel to the plane in which the wire loop is lying;
• a layer of material enveloping the wire loop, wherein the layer of material includes a first section on the first side of the wire and a second section on the second side of the wire;
• a mesh bonded to the layer of material and configured to form a net having an opening circumscribed by said wire loop, wherein the mesh includes a plurality of strands and a plurality of pores between the plurality of strands, wherein portions of the plurality of strands are coupled to the layer of material, wherein the portions of the plurality of strands are positioned along an outer periphery of the mesh and include one or more terminal ends, and wherein the one or more terminal ends are directly and immovably coupled to, and enveloped by, the layer of material, wherein the one or more terminal ends are only coupled to the first section;
• and
• a tubular sheath comprising an elongate body, a proximal end, a distal end, and a lumen within, wherein said flexible wire loop with bonded mesh is adapted to be retractable into said lumen and adapted to be extendable out of said lumen through an opening at said distal end of said tubular sheath, by manipulation of a link member positioned at said proximal end of said tubular sheath, and wherein at least one of said flexible wire loop and said mesh comprise a color such then when exposed to light in a first wavelength range, reflects light having a wavelength range of 400 nm to 570 nm and 620 nm to 750 nm and absorbs light having a wavelength range of 571 nm to 619 nm.