A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 18/02 (2006.01) A61M 25/10 (2006.01) A61B 17/22 (2006.01)
Patent
CA 2437078
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.
Borden Ladner Gervais Llp
Cryocor Inc.
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