Patent ID: 8206385

Claim:
A catheter comprising: (a) an elongate catheter shaft assembly having an inner shaft member having a distal end and a proximal end, and an outer shaft member having a distal end, a proximal end, and a lumen between the distal end and the proximal end thereof, the inner shaft member being inserted into the lumen of the outer shaft member along a longitudinal direction of the elongate catheter shaft assembly, wherein the inner shaft member includes at the distal end thereof a catheter tip member having a lateral dimension that is larger than a lateral dimension of the lumen of the outer shaft member, and (b) at least one electrode at least partially disposed on an external surface of the outer shaft member; (c) an electrical line coupled between the at least one electrode of the outer shaft member and an electrode disposed on an external surface of the inner shaft member at the proximal end; and (d) a handle member at the proximal end of the assembly having a catheter receptacle, wherein when the proximal end of the inner shaft member is inserted into the catheter receptacle, the electrode on the external surface of the inner shaft member electrically contacts an electrical connector element.