Patent ID: 7901402

Claim:
Apparatus for applying energy to a hollow anatomical structure, said apparatus comprising: an outer sheath, said outer sheath having a distal end and an inflatable, occlusive balloon located at said distal end of said sheath, said sheath defining an inflation lumen which is in fluid communication with said balloon via at least one port underlying said balloon, said balloon having an inflated state wherein said balloon is of sufficient size to occlude a deep vein in a human leg; a fluid delivery lumen extending through said outer sheath and distal of said balloon; and an elongate treatment device extending through said outer sheath; said elongate treatment device having a distal end located distal of said balloon, said elongate treatment device being configured to apply energy to a wall of said hollow anatomical structure; wherein said apparatus is adapted for a flow of liquid to pass through said fluid delivery lumen, distal of said balloon and toward said distal end of said elongate treatment device; wherein said elongate treatment device comprises a catheter having a distal end and first and second pluralities of expandable electrode leads mounted at the distal end, the second plurality of leads being separate from and longitudinally spaced apart from the from the first plurality.