What is HiFu?

High-intensity focused ultrasound (HIFU) works by directing ultrasound waves to specific layers of the skin and underlying tissues. Unlike traditional ultrasound used for diagnostic purposes, HIFU concentrates the energy in a small area, creating high temperatures deep below the skin's surface. This thermal stimulation causes controlled tissue damage, which stimulates the body's natural healing process.

By reaching the SMAS (superficial musculo-aponeurotic system) layer – a structure typically treated in a surgical facelift – the procedure results in skin tightening and lifting without the need for incisions or recovery time.

The immediate contraction and tightening of collagen fibers in the HiFu procedure is due to the thermal effect of ultrasound energy. When the ultrasound pulses penetrate the skin and reach the deep layers of the dermis or even the superficial muscular aponeurotic layer (SMAS), they increase the local temperature to about 60-70°C. This thermal energy causes denaturation of collagen molecules - a structural process in which the triple helical structure of collagen is temporarily disrupted.

As a result of this change, the collagen fibers contract and tighten, which leads to immediate lifting and tightening of the skin. This is the visible short-term effect of the procedure. In addition, the thermal effect stimulates fibroblasts - cells in the dermis responsible for the synthesis of new collagen and elastin. It is this process that leads to long-term improvement in the texture and elasticity of the skin within the next 3 to 6 months.

The procedure is performed using a specialized device that produces ultrasound pulses of different frequencies and intensities. Depending on the area being treated, the ultrasound penetrates to a depth of 1.5 to 4.5 millimeters. When treating areas of the body with a thicker subcutaneous layer, such as the thighs, abdomen and hips, specific transducers are used that can penetrate to a depth of 8 to 13 millimeters.

One of the key aspects of HIFU's effectiveness is the ability to precisely adjust the parameters to the individual characteristics of the patient. It is important that the procedure is performed by qualified specialists who can assess the skin condition and determine the most appropriate treatment plan.