Microwave aided balloon angioplasty with lumen measurement
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United States of America Patent
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Jul 14, 1992
Issued Date -
N/A
app pub date -
Sep 18, 1990
filing date -
Nov 10, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A multipurpose catheter apparatus for microwave aided balloon angioplasty includes a balloon capable of being filled with a lossy dielectric liquid, and bearing a metallization pattern. The catheter includes an electromagnetic transmission line. Radio frequency energy applied to the proximal end of the electromagnetic transmission line is radiated by an antenna within the balloon. The metallization pattern causes a portion of the energy applied to the proximal end of the transmission line to be reflected, which affects a characteristic such as impedance, return loss or time of reflection. A measurement apparatus measures the characteristic, and the distention of the balloon is determined from the measured characteristic. A guide filament may extend through the transmission line.
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