Apparatus and method for leak detection in a fluid-filled balloon useful to treat body tissue
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United States of America Patent
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May 2, 2000
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N/A
app pub date -
Aug 4, 1997
filing date -
Aug 4, 1997
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Abstract
An apparatus for detecting leaks in a fluid-filled device used to treat a patient's tissue includes an catheter having an expandable device defining a fluid reservoir about the distal end of the catheter. An internal electrode is in electrical contact with a conductive fluid within the fluid reservoir. A grounding electrode is outside of the fluid reservoir, in electrical contact with the patient's tissue. Voltage is supplied to the internal electrode and the grounding electrode. Where a leak occurs in the expandable device, conductive fluid will contact the patient's tissue, thus creating an electrical current path between the internal electrode and the grounding electrode. This so-called 'leak current' is used to generate a leak alarm signal.
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