Intravascular, ultrasonic imaging catheters and methods for making same
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United States of America Patent
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-
Aug 31, 1993
Issued Date -
N/A
app pub date -
Feb 14, 1992
filing date -
Apr 28, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Novel intravascular, ultrasonic imaging catheters are provided which utilize thin layers of a flexible plastic material, such as PVDF, which can be spot polarized in active regions which are to serve as piezoelectric transducers. Thin layer metallic electrodes are deposited on opposing surfaces of these active regions. Strips of the appropriately configured material also having shielding and backing and/or core forming portions are spiral wound into a completed catheter. Alternatively, the catheters are fabricated from extruded PVDF tubing which may be formed around a central core which carries those electrodes which are to contact the inner surface of the extruded tube.
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