Catheter for laser treatment of atherosclerotic plaque and other tissue abnormalities
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United States of America Patent
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Jun 29, 1999
Issued Date -
N/A
app pub date -
May 5, 1997
filing date -
Jan 26, 1990
priority date (Note) -
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Abstract
A medical catheter for treating atherosclerotic plaque and other abnormalities includes optical fibers for applying laser energy to the plaque and an ultrasonic transducer system for sensing the location and configuration of the plaque. The optical fibers and electrical wiring for the transducers extend through a probe which is rotatable inside of the catheter tube to provide universal directional control of the fibers and transducers. A reflective system includes a curved reflector in the probe which can be axially adjusted to vary the directions of the ultrasonic signals. Alternative forms of the invention include different reflector schemes, an angled ultrasonic transducer having a conical signal output that varies with frequency, and various different systems for rotating the transducers and fibers.
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