| US 7,520,877 B2 | ||
| Radiofrequency ablation system using multiple prong probes | ||
| Fred T. Lee, Jr., Madison, Wis. (US); Thomas C. Winter, III, Middleton, Wis. (US); Dieter G. Haemmerich, Madison, Wis. (US); and Lisa A. Sampson, Cambria, Wis. (US) | ||
| Assigned to Wisconsin Alumni Research Foundation, Madison, Wis. (US) | ||
| Filed on Aug. 05, 2004, as Appl. No. 10/911,927. | ||
| Application 10/911927 is a continuation in part of application No. 10/167681, filed on Jun. 10, 2002. | ||
| Application 10/167681 is a continuation in part of application No. 09/873541, filed on Jun. 04, 2001. | ||
| Claims priority of provisional application 60/315383, filed on Aug. 28, 2001. | ||
| Claims priority of provisional application 60/210103, filed on Jun. 07, 2000. | ||
| Prior Publication US 2005/0010209 A1, Jan. 13, 2005 | ||
| Int. Cl. A61B 18/18 (2006.01) | ||
| U.S. Cl. 606—42 [606/47; 606/48; 606/50] | 17 Claims |
| 1. A radiofrequency ablation system comprising:
an electric probe comprising a plurality of prongs, each of the plurality of prongs being electrically isolated from the others
of the plurality of prongs, the electric probe including pairs of opposing, spaced apart prongs, the pairs being angularly
spaced around a central treatment area between each pair of prongs;
a radiofrequency power source;
and
a switch system communicating with the prongs and the radiofrequency power source to selectively energize the respective pairs
of opposing prongs, wherein the switching system selectively connects each pair of prongs to the radiofrequency power source,
the pairs of prongs being energized sequentially to provide a high temperature treatment area in the central area between
the pairs of prongs.
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