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Fat removal procedures are used mostly in cosmetic surgery with the intention of removing unwanted adipose tissue.The procedure may be invasive, as with liposuction, [1] or noninvasive using laser therapy, radiofrequency, ultrasound or cold (cryoablation or cryolipolysis) to reduce fat, sometimes in combination with injections.
A 2023 review of 18 studies reported average reductions in fat thickness of 2.0 to 5.1 mm as measured by ultrasound, concluding that the procedure is safe and modestly effective, though the quality of available data was considered low. [2]
Because cavitation can only occur in liquids, chemical reactions are not seen in the ultrasonic irradiation of solids or solid–gas systems. For example, in chemical kinetics , it has been observed that ultrasound can greatly enhance chemical reactivity in a number of systems by as much as a million-fold; [ 15 ] effectively acting to activate ...
Ultrasonic cavitation device is a surgical device using low frequency ultrasound energy to dissect or fragment tissues with low fiber content. It is basically an ultrasound probe (acoustic vibrator) combined with an aspirator device ( suction ).
A harmonic scalpel cuts via vibration. The scalpel surface itself cuts through tissue by vibrating in the range of 55,500 Hz. The high frequency vibration of tissue molecules generates stress and friction in tissue, which generates heat and causes protein denaturation.
On the other hand, transient cavitation is where these cavitation bubbles uncontrollably and rapidly grow and decay over many acoustic pressure cycles. [1] However, while cavitation is considered the primary mechanism for sonophoresis, the gas bubbles that contribute to cavitation are generated by a process termed rectified diffusion.
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