Title:
EXPANDABLE CATHETER SYSTEM FOR PERI-OSTIAL INJECTION AND MUSCLE AND NERVE FIBER ABLATION
Document Type and Number:
WIPO Patent Application WO/2012/145304
Kind Code:
A3
Abstract:
At the present time, physicians often treat patients with atrial fibrillation (AF) using radiofrequency (RF) catheter systems to ablate conducting tissue in the wall of the Left Atrium of the heart around the ostium of the pulmonary veins. These systems are expensive and take time consuming to use. The present invention circular ablation system CAS includes a multiplicity of expandable needles that can be expanded around a central axis and positioned to inject a fluid like ethanol to ablate conductive tissue in a ring around the ostium of a pulmonary vein quickly and without the need for expensive capital equipment. The expansion of the needles is accomplished by self-expanding or balloon expandable structures. The invention includes centering means so that the needles will be situated in a pattern surrounding the outside of the ostium of a vein. Also included are members that limit the distance of penetration of the needles into the wall of the left atrium, or the aortic wall. The present invention also has an important application to ablate tissue around the ostium of one or both renal arteries, for the ablation of the sympathetic nerve fibers and/or other afferent or efferent nerves going to or from each kidney in order to treat hypertension.
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Inventors:
FISCHELL DAVID R (US)
FISCHELL TIM A (US)
FISCHELL TIM A (US)
Application Number:
PCT/US2012/033918
Publication Date:
February 20, 2014
Filing Date:
April 17, 2012
Export Citation:
Assignee:
ABLATIVE SOLUTIONS INC (US)
FISCHELL DAVID R (US)
FISCHELL TIM A (US)
FISCHELL DAVID R (US)
FISCHELL TIM A (US)
International Classes:
A61M31/00; A61M5/32
Foreign References:
| US20100222851A1 | 2010-09-02 | |||
| US5980516A | 1999-11-09 | |||
| US6905480B2 | 2005-06-14 | |||
| US6854467B2 | 2005-02-15 | |||
| US7881807B2 | 2011-02-01 | |||
| US7472705B2 | 2009-01-06 | |||
| US7850656B2 | 2010-12-14 | |||
| US7794444B2 | 2010-09-14 | |||
| US6375660B1 | 2002-04-23 | |||
| US5474102A | 1995-12-12 | |||
| US7621945B2 | 2009-11-24 | |||
| EP0876805B1 | 2006-08-23 |
Other References:
See also references of EP 2699182A4
Attorney, Agent or Firm:
KNOBBE, MARTENS, OLSON & BEAR, LLP (Fourteenth FloorIrvine, CA, US)
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