System and method for performing a single step cryoablation

Details System and method for performing a single step cryoablation System and method for performing a single step cryoablation

2005-05-17

2005-05-17

Gibson, Roy D. (Department: 3739)

Surgery

Instruments

Cyrogenic application

C606S020000, C600S113000

Reexamination Certificate

active

06893433

ABSTRACT:
A system for cryoablating target tissue at a treatment site includes a cryo-element mounted at the distal end of a cryo-catheter. A balloon catheter is provided having a U-shaped balloon attached thereon. The cryo-element is threaded onto a pre-positioned guidewire and advanced within the patient's vasculature until the cryo-element is positioned at the treatment site. Next, the balloon is threaded onto the guidewire and advanced within the patient's vasculature using the balloon catheter. At the treatment site, the U-shaped balloon is interposed between the cryo-element and the target tissue. Saline solution is pumped into the balloon causing the U-shaped balloon to expand and contact both the cryo-element and the surrounding target tissue. Next, a refrigerant is expanded to cool the cryo-element, which in turn, freezes the saline solution. The resulting “ice ball” extracts heat from surrounding tissue resulting in the cryoablation of a substantially circumferential portion of tissue.

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