Technology guide
The cavitation effect in aesthetic ultrasound
Cavitation is not a single phenomenon: depending on intensity, the bubbles oscillate gently or implode. Understanding this difference helps you set up cavitation and explain its limits.
Definition
Acoustic cavitation is the formation of microbubbles in tissue exposed to low-frequency ultrasound, around 40 kHz in aesthetics. These bubbles grow during the rarefaction phases and contract during the compression phases.
Stable cavitation
At moderate intensity, the bubbles oscillate regularly without bursting. The effect on the tissues is gentle and gradual.
Inertial cavitation
Above a certain intensity threshold, the bubbles become unstable and implode. The implosion creates a highly localised shock wave and microjet that weaken the membrane of fat cells. This is the effect sought to reduce fat deposits, but it requires well-controlled settings.
The settings that matter
Frequency, power, exposure time per area and applicator shape determine the type of cavitation obtained. Increasing the power increases the effect, but also discomfort and risk.
Cavitation and liposuction
Cavitation is a non-invasive alternative for mild to moderate fat deposits, with no incision or social downtime. Its results are less marked than liposuction and require several sessions as well as a stable lifestyle.
Why combine it with radiofrequency
Cavitation acts on fat volume but not on skin firmness. Radiofrequency, which stimulates collagen, therefore often complements the treatment, as on the BodyPerfect III.