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Page 12 of 28 Farber et al. Plast Aesthet Res 2020;7:72 I http://dx.doi.org/10.20517/2347-9264.2020.152

Figure 8. Fractionated bipolar radiofrequency sublative skin resurfacing (eMatrix) and high-intensity focused ultrasound (Ultherapy). 56
yo Caucasian Fitzpatrick III with a history of lower lid blepharoplasty and full-face TCA peel presented with fine facial rhytids and mild
facial ptosis. Before (top) and after (bottom) full face fractionated bipolar radiofrequency skin resurfacing (eMatrix) and high-intensity
focused ultrasound (Ultherapy) to the neck, face, and brow

Infrared light energy
Mechanism
Of the noninvasive skin tightening modalities, infrared technology (such as SkinTyteÔ) is the least well
studied. The procedure works by delivering infrared energy via broadband light to create heat in the dermis
and initiate collagen remodeling.

Indications
Unlike ultrasound-based skin tightening, infrared energy does not penetrate to the deeper subcutaneous
tissues. Therefore, it is indicated only in mild forms of skin laxity that do not involve the underlying tissue.
Similar to other modalities, it should be used with caution in patients with higher Fitzpatrick types.

Procedure
Typically, infrared skin tightening is not painful enough to require any form of anesthetic. It is performed
by heating individual treatment zones to a particular temperature by performing a series of treatment cycles
[37]
and skin temperature measurements. The skin is then allowed to cool or cool compresses are applied .