Patent ID: 9216053
Filing Date: 2015-12-22
Classification: A61B

Abstract:
1. An elongate member and cannula assembly, comprising: a cannula comprising a lumen, an electrically insulated region, and an electrically-exposed conductive region, the lumen extending through the electrically insulated region and the electrically-exposed conductive region, the electrically-exposed conductive region configured for delivering energy to form a lesion within a patient's body at an intended location; and an elongate member configured within the cannula, the elongate member comprising a proximal region, a distal region, and a pre-determined length, the elongate member engaged with the cannula via a structure at the proximal region such that the pre-determined length extends a pre-determined insertion depth within the cannula and remains fixed therein, the elongate member comprising a non-conductive radiopaque marker at a pre-determined position on an outer surface of the distal region of the of the elongate member, wherein the radiopaque marker provides a variation in radiopacity at the pre-determined position when the elongate member is engaged with the cannula via the structure and inserted to the pre-determined insertion depth, the pre-determined length of the elongate member being sized such that, when the elongate member is cooperatively engaged with the cannula via the structure and inserted to the pre-determined insertion depth, a distal end of the elongate member extends beyond a distal end of the electrically insulated region of the cannula and aligns with a distal end of the electrically-exposed region of the cannula such that the radiopaque marker aligns with the distal end of the electrically insulated region to indicate the intended location of the lesion, the cannula connectable to an energy source for forming the lesion.