Methods for reduction of restenosis

摘要

An ablation apparatus for treating tissues, tubular organs, or atherosclerosis of a blood vessel of a patient having an implanted medical stent, the ablation apparatus comprising a catheter shaft having a retracable preshaped electrode means at the distal end of the catheter shaft, the electrode means having a plurality of expandable/collapsible wire members adapted for contacting the wire members to the stent and applying RF current to treat the tissues underlying the stent for therapeutic purposes.