VESSEL ABLATION SYSTEM WITH ADJUSTABLE ABLATION TERMINAL
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United States of America Patent
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Issued Date -
Sep 29, 2016
app pub date -
Mar 24, 2016
filing date -
Mar 24, 2016
priority date (Note) -
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Abstract
RF ablation system includes a catheter having a lumen therein and a first electrode. Second electrode is disposed around the catheter proximate the distal end of the catheter and spaced from the first electrode by an insulating spacer which may be a part of the catheter or a sleeve on the first electrode. The first electrode is able to slide in and out of the catheter to vary the exposed length of the first electrode and as a result to alter the energy density at the first electrode in order to exhibit different heating effects. Control unit controls current through the electrodes and also the exposed length of the first electrode. The second electrode has a surface area at least twice that of the first electrode. Consequently, negligible heat is generated at the second electrode and therefore no blood clotting or other ablation material is formed over the catheter.
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