A sterile, flexible, end- and/or side-hole tube with a long snaring device (e.g., a wire loop or noose) inserted through its lumen, designed to be introduced into a blood vessel or similar structure to manually retrieve or manipulate a foreign body. It is typically available in two forms: 1) the loop emerges from the distal tip of the catheter while both free ends of the wire emerge from the proximal end; and 2) the end of the wire is attached to the distal end of the catheter while the free end is passed through the lumen to emerge at the proximal end. The wire is usually made of a high-strength, stiff metal [e.g., nickel-titanium alloy (Nitinol)].
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