Transmyocardial revascularization using ultrasound
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United States of America Patent
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Jan 28, 2003
Grant Date -
Oct 17, 2002
app pub date -
Jan 31, 2000
filing date -
Feb 17, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
A method and apparatus for performing transmyocardial revascularization using ultrasound is disclosed. The apparatus includes a phased array ultrasonic device that includes a plurality of ultrasonic transducer elements which are controlled using a feedback control system so that each ultrasonic transducer element produces an ultrasonic wave of particular power and phase in order to achieve constructive interference at a desired acoustic focus. The constructive interference creates high pressure amplitudes for vaporizing the target tissue at the focus. A method is provided for vaporizing target tissue for which a plurality of ultrasonic transducers are focused so as to provide constructive interference within the target tissue. The ultrasonic beams are launched and produce a rapid rise in tissue temperature that will vaporize the target tissue within the focal zone.
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