Dualsonic HIFU in Korea Judged by Its Protocol

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Focused ultrasound devices share one principle: energy converges at a set depth, heats a small point and leaves the surface intact, and collagen remodels around those points over the following months. Devices differ in cartridges and settings; clinics differ in how they use them. Two sessions on one unit can look different if one follows a fixed template and the other is drawn around the patient's jaw and neck.

The manufacturer, cartridge depths and regulatory approval are not always printed on a clinic menu, so ask for them directly. Then move to the plan itself.

• Which depth is applied first, and why
• How many lines each zone receives
• Whether the map is adjusted to your jaw and neck
• Who places the lines on the day

Wood and colleagues, writing in the Journal of Drugs in Dermatology in 2024, randomized 51 people to one session of microfocused ultrasound with visualization on the lower face and upper neck, using either a standard line protocol or a custom one planned around each person's anatomy and aimed at the SMAS and fibrous septae. Graders were blinded to the group.

Both groups improved by more than one point on a jawline laxity scale, and three-dimensional photographs recorded lifting in both. The authors concluded that custom maps help most when the lower face and neck depart from typical anatomy. The trial did not use Dualsonic, so treat it as guidance on planning rather than a result for this device.

A 2014 study in Medical Lasers by Kim, So and Ryu treated Korean volunteers, 19 women and one man, first with a 4.5 mm, 4 MHz probe and then a 3.0 mm, 7 MHz probe. Two blinded clinicians compared photographs taken before and three months later; 16 of the 17 people assessed showed clinical improvement, with no specific side effects noted.

That order, deep layer first and mid-dermis second, is a common HIFU pattern. If a Dualsonic plan uses another order or one depth only, ask why; thin tissue over bone can be a sound reason. The study was small, and its abstract does not tie the findings to the Dualsonic name.

Many visitors try more than one HIFU device over the years, sometimes at different clinics in Seoul. A short log helps every later consultation: device name, cartridge depths, lines per zone, the date and how your face felt in the following weeks.

It also shows whether a change you liked followed a particular depth or zone. Results vary from person to person, so the log describes your own response.

Common effects are brief discomfort during the pass, temporary redness and swelling, tenderness along the jaw and occasional bruising. Less often, a small area feels numb or sensitive for a while. Tell the clinic about anything that worsens rather than fades.

Wait or choose another route if you are pregnant, have an active skin problem on the area, have a recent filler, thread or implant in the zone, or have heavy sagging that is more likely to need surgery.