Method and apparatus for producing homogenous cavitation to enhance transdermal transport
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United States of America Patent
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Sep 16, 2003
Grant Date -
N/A
app pub date -
Jul 26, 2001
filing date -
Dec 17, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is directed to apparatus and methods for producing homogenous cavitation. An ultrasound souce comprising an ultrasound transmitting element having an axis and a cross-section along the axis is disclosed The ultrasound transmitting element also has a first axial end and a second axial end operable to produce ultrasonic waves. The cross-section has an area having a maximum value at the first axial end and a minimum value at the second axial end. A method for producing homogenous cavitation at an area of skin comprises creating a volume of fluid having a uniformly dispersed concentration of cavitation nuclei adjacent the area of skin. Ultrasound is then applied to the volume of fluid and causes cavitation at the cavitation nuclei.
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