Surgery – Instruments – Cyrogenic application
Reexamination Certificate
2005-06-14
2005-06-14
Rollins, Rosiland (Department: 3739)
Surgery
Instruments
Cyrogenic application
C606S020000, C606S021000, C606S022000, C606S023000
Reexamination Certificate
active
06905494
ABSTRACT:
An enhanced method and device are provided to treat atrial fibrillation or inhibit or reduce restenosis following angioplasty or stent placement. A balloon-tipped catheter is disposed in the area treated or opened through balloon angioplasty immediately following angioplasty. The balloon, which can have a dual balloon structure, may be delivered through a guiding catheter and over a guidewire already in place. A fluid such as a perfluorocarbon flows into the balloon to freeze the tissue adjacent the balloon, this cooling being associated with reduction of restenosis. A similar catheter may be used to reduce atrial fibrillation by inserting and inflating the balloon such that an exterior surface of the balloon contacts at least a partial circumference of the portion of the pulmonary vein adjacent the left atrium. In another embodiment, blood perfusion is performed simultaneously. In another embodiment, tissue contacted by the cryoablation catheter, undesired to be ablated, is protected against damage by a separate heating step.
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Dobak III John D.
Inderbitzen Rebecca S.
Kramer Hans W.
Yon Steven A.
Innercool Therapies, Inc.
Mayer Fortkort & Williams PC
Rollins Rosiland
Wieczorek, Esq. Mark
Williams Esq. Karin L.
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