Patent ID: 6878151

Claim:
A device comprising a core wire having a distal end and a proximal end; a catheter shaft having a proximal catheter end, a distal catheter end and a lumen through which the core wire is passed such that the distal end of the core wire extends beyond the distal catheter end; a proximal junction member disposed around the core wire distal to the distal catheter end, wherein the proximal junction member has a lumen through which the core wire is passed; a distal junction member disposed around the core wire distal to the proximal junction member, wherein the distal junction member has a lumen through which the core wire is passed, wherein at least one of the proximal or distal junction members is permanently and slidably attached to the core wire; a structure attached to the distal end of the core wire, wherein said structure is sized so that it cannot pass through the lumen of the distal junction member; a retrieval element having two ends, wherein at least one end is attached to the distal or proximal junction member; and a stop element.