CPC A61M 37/0092 (2013.01) [A61B 2017/00765 (2013.01)] | 23 Claims |
1. A sonotrode for transmitting acoustic energy from an ultrasound generator to a substrate, for use in transdermal delivery of therapeutic or cosmetic compounds, the sonotrode comprising a proximal portion to be coupled in use to the ultrasound generator and a neck portion coupled at one end to the proximal portion and terminating at a distal end in a flared foot portion,
acoustic energy from the ultrasound generator being applied in use to the substrate by transmission of ultrasound through the proximal portion, the neck and the foot portion,
wherein a total effective length of the sonotrode is substantially equal to one third of a wavelength of the acoustic energy applied to the sonotrode from the ultrasound generator, and
whereby a maximum amplitude of an acoustic energy wave is focused below a surface of the skin.
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