Radiofrequency
Radiofrequency (RF) is a non-surgical aesthetic technology that uses high-frequency alternating current (300 kHz to 40 MHz) to generate heat in the deeper layers of the skin. Unlike lasers, which depend on a target pigment (chromophore) to absorb light, RF produces heat from the tissue's natural electrical resistance (Joule heating). As current passes through tissue, ions and water molecules move constantly, converting electrical energy into controlled heat of 40–70°C in the dermis and subcutaneous fat while keeping damage to the epidermis to a minimum.
At Haute-Derma, RF is widely used in treatment plans for wrinkles, lifting and tightening lax skin, refining enlarged pores and remodeling depressed scars. By carefully matching the electrode type, energy depth and skin impedance, we achieve strong tissue tightening with a high level of safety.
How RF Works: Biology and Electrical Heating
The heat generated by RF acts on the skin in two linked biological phases:
- Immediate collagen contraction: when the dermis reaches 60–65°C, the weak hydrogen bonds between polypeptide chains break. The collagen triple helix denatures and shortens on the spot, so the skin looks firmer and smoother right after treatment.
- Long-term collagen renewal (neocollagenesis and tissue remodeling): the micro-thermal injury triggers controlled inflammation, releasing growth factors (TGF-beta, FGF) and activating heat shock proteins (HSP-47). Fibroblasts are strongly stimulated to divide and produce new type I and III collagen and elastin fibers over the 1–6 months after treatment.
- Effect on fat (adipose tissue remodeling): fat has much higher electrical resistance than skin. Deep RF energy can make fat cell membranes more permeable and activate lipase to break down triglycerides, helping to refine facial contours such as the double chin and jawline.
Types of Clinical RF Technology
| Technology / technique | Electrode design and treatment depth | Main uses at Haute-Derma |
|---|---|---|
| Monopolar RF | One treatment electrode plus one return (grounding) pad; deep action (up to 5–15 mm) | Lifting, tightening lax skin, slimming the jawline and flanks |
| Bipolar / multipolar RF | Two or more electrodes on one handpiece; superficial to mid-depth action (1–4 mm) | Fine lines around the eyes and mouth, surface rejuvenation, skin relaxation |
| Microneedling RF | Microneedles penetrate the skin and deliver RF pulses at the needle tips | Depressed scars, enlarged pores, stretch marks, sagging double chin, advanced skin aging |
| Subdermal RF | A fine cannula delivers RF directly beneath the fat layer / SMAS | Severe jowl and chin sagging, excess cheek fat, deep subdermal rejuvenation |
Clinical Procedure and Combination Protocols at Haute-Derma
- Impedance assessment and target temperature settings: the doctor checks skin and fat thickness and chooses a suitable coupling gel so the RF current flows evenly into the tissue without building up at the surface.
- Vector pass technique
- Non-invasive RF (monopolar/multipolar): the handpiece is moved along lifting vectors (from the jawline up toward the ear, from the nasolabial fold toward the temple). Skin surface temperature is held steady at 40–43°C (monitored with an infrared camera) for at least 10–15 minutes per area.
- Microneedling RF: needle depth is set precisely for each area (1.5 mm for the cheeks, 0.8 mm for the forehead, 3.0 mm for the double chin), and fractional RF energy is delivered directly into the dermis.
- Active infusion and enhanced recovery: right after microneedling RF, we infuse high-concentration exosomes or low-molecular-weight hyaluronic acid to speed healing and help boost collagen production.
Managing Side Effects and Clinical Safety
- Unwanted fat loss (fat atrophy / volume loss): occurs when monopolar RF energy builds up too much in the superficial fat, damaging fat cells and causing hollow cheeks or dents. It is prevented by controlling energy density and avoiding repeated stacking over cheeks with little fat.
- Burns / surface blisters (thermal blisters): caused by the handpiece not sitting flat on the skin or too little coupling gel. Treated with immediate cooling, antibiotic ointment and a lipid barrier repair cream.
- Post-inflammatory hyperpigmentation (PIH): rare with non-invasive RF, but possible after microneedling RF on darker skin (Fitzpatrick IV–V) if the energy is set too high. Apply broad-spectrum sunscreen and a topical anti-inflammatory right after the procedure.
