Elsaie Mohamed Lotfy
MBAFellow of Dermatology and Cutaneous Surgery, University Miami School of Medicine, USA.
Indian J Dermatol. 2009 Jul;54(3):201-5. doi: 10.4103/0019-5154.55625.
Radio frequency (RF) is electromagnetic radiation in the frequency range of 3-300GHz. The primary effects of RF energy on living tissue are considered to be thermal. The goal of the new devices based on these frequency ranges is to heat specific layers of the skin. The directed use of RF can induce dermal heating and cause collagen degeneration. Wound healing mechanisms promote the remodeling of collagen and wound contraction, which ultimately clinically enhances the appearance of mild to moderate skin laxity. Preliminary studies have reported efficacy in the treatment of laxity that involves the periorbital area and jowls. Because RF energy is not dependent on specific chromophore interaction, epidermal melanin is not at risk of destruction and treatment of all skin types is possible. As such, radiofrequency-based systems have been used successfully for nonablative skin rejuvenation, atrophic scar revision and treatment of unwanted hair, vascular lesions and inflammatory acne. The use of RF is becoming more popular, although a misunderstanding exists regarding the mechanisms and limitations of its actions. This concise review serves as an introduction and guide to many aspects of RF in the non ablative rejuvenation of skin.
射频（RF）是频率范围在3 - 300GHz的电磁辐射。射频能量对活体组织的主要影响被认为是热效应。基于这些频率范围的新设备的目标是加热皮肤的特定层次。定向使用射频可引起真皮层发热并导致胶原蛋白变性。伤口愈合机制促进胶原蛋白重塑和伤口收缩，最终在临床上改善轻度至中度皮肤松弛的外观。初步研究报告了射频在治疗涉及眶周区域和下颌的皮肤松弛方面的疗效。由于射频能量不依赖于特定的发色团相互作用，表皮黑色素不会有被破坏的风险，所有皮肤类型都可以进行治疗。因此，基于射频的系统已成功用于非剥脱性皮肤年轻化、萎缩性瘢痕修复以及治疗多余毛发、血管病变和炎性痤疮。射频的使用正变得越来越普遍，尽管对于其作用机制和局限性存在误解。这篇简明综述旨在介绍并指导射频在非剥脱性皮肤年轻化中的诸多方面。
