Patent ID: 7153301

Claim:
A medical device for ablation within an animal vessel, the medical device comprising: (a) a catheter having a distal end for insertion into the animal vessel and a proximal end that remains outside the animal vessel; (b) a first inflatable seal secured to said catheter at a first location, said first inflatable seal being adapted to seal the animal vessel to prevent a flow of blood through the animal vessel; (c) a second seal secured to said catheter at a second location, said second location being between said first location and said proximal end of said catheter, said second seal being adapted to limit a backflow of blood into the animal vessel, wherein the second seal is a flexible disk; (d) at least a first opening in said catheter adapted to introduce a first inflating fluid to inflate said first inflatable seal; and (e) an introduction member secured to said catheter to introduce a fluid media into the animal vessel at a location between said first inflatable seal and said second seal, wherein the fluid media is adapted to ablate tissue comprising at least part of the animal vessel between said first inflatable seal and said second seal.