Sonic element and catheter incorporating same
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United States of America Patent
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Dec 30, 2003
Grant Date -
N/A
app pub date -
Oct 19, 2000
filing date -
Oct 20, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A catheter carrying a radially-expansible ultrasonic transducer is threaded into the circulatory system and then the transducer is actuated to provide ultrasonic energy in a ring-like zone surrounding a blood vessel. Desirably, the transducer is arranged to focus the ultrasonic energy into a narrow, ring-like focal zone having an extent, in the axial direction along the catheter, less than the axial extent of the transducer. The transducer desirably is expanded after threading so that during application of the ultrasonic energy, the transducer bears on the interior wall of a blood vessel through a balloon covering the transducer. The transducer may include one or more resilient spiral elements carrying a flexible piezoelectric material.
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