Method for the radio frequency perforation and the enlargement of a body tissue
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United States of America Patent
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May 20, 2003
Issued Date -
N/A
app pub date -
Sep 10, 2001
filing date -
Jun 27, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
For creating a hole in body tissue and then enlarging the hole, a guidewire has a continuous diameter guidewire body having a proximal end and a distal end, a distal portion including an electrically conductive exposed tip for creating a perforation when RF current is applied and for preventing the creation of a perforation when RF current is not applied. For expanding the hole, a dilator region is provided between the distal end of the guidewire body and the distal portion for expanding the hole, and has a tapered profile. Also for expanding the hole, an inflatable balloon is located circumferentially on the guidewire body, and a catheter located on the guidewire body and in communication with the balloon for delivery of fluid to the balloon for its inflation.
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