Patent ID: 8057484

Claim:
A device for use within an instrument channel of an endoscope for retrieving objects from within a human body, the device comprising: a. a body; b. a handle mounted to and movable relative to said body; c. a tubular member having a first end fixed to said body and a second end, the tubular member defining a passage and opening at said second end; d. a link having a first end fixed to said handle and a second end remote from said body, said link extending substantially through said tubular member passage; and e. a net comprising a loop and a net element secured to said loop and having an object receiving pouch section, said net disposed adjacent said link second end for deployment and retrieval through said tubular passage opening; f. said loop being expandable to a polygon shape formed by a plurality of linear segments separated by collapse-resistant bends and said loop being collapsible by action of said handle relative to said body, wherein said loop comprises a piece of wire having a single spiral wire structure located at a distal end of said loop; g. wherein said loop has a maximum width defined by two opposing linear segments of the polygon shape, wherein a distance along a longitudinal axis of the loop from a distal most point of each linear segment to a distal most point of the loop is less than the distance from a proximal most point of each linear segment to a proximal most point of the loop.