CASE REPORTS
RESEARCH SUPPORT, NON-U.S. GOV'T
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Fractional Radiofrequency Microneedling Combined With Fractional Carbon Dioxide Laser Treatment for Striae Distensae.

BACKGROUND AND OBJECTIVES: To evaluate the safety and effectiveness of combined fractional radiofrequency microneedling (FRM) and fractional carbon dioxide (FCO2 ) laser treatment for striae distensae and to compare the results to those of FRM alone and those of FCO2 alone.

STUDY DESIGN/MATERIALS AND METHODS: Adult women (Fitzpatrick skin types III-IV) with striae distensae on the abdomen or calf were enrolled in this study. Each lesion was divided into three regions, with each region assigned to one of the three treatments (FCO2 , FRM, or combined FCO2 and FRM). Global photographic assessments were performed by three dermatologists and by patients using a scored visual analog scale (VAS). Additionally, each lesion was evaluated using a skin imaging analyzer and a diagnostic ultrasound system.

RESULTS: All 19 female subjects had an average body mass index of 23.85 kg/m2 . The global assessment by dermatologists indicated a significant improvement in the combined treatment group (6.1) compared with the other groups (4.3 and 5.1 in the FRM and FCO2 groups, respectively; P < 0.05), and that by the patients indicated a significant improvement in the combined treatment group (6.3) compared with the FRM group (5.1; P = 0.02). Ultrasound results showed significantly increased skin thickness and dermal density (204.9 μm and 8.8%; both P < 0.05) in the combined treatment group. However, results of the skin imaging analysis showed a higher average level of melanin and redness indices in the combined treatment group than in the FRM group (P < 0.001, P < 0.01, respectively), but not in the FCO2 group (P = 0.15, P = 0.11, respectively).

CONCLUSION: Combined FRM and FCO2 treatments resulted in slightly better clinical outcomes than single treatments, and the side effects of the treatment, such as pigmentation and persistent erythema, did not result in more serious events to a level similar to that of FCO2 alone. Lasers Surg. Med. © 2020 Wiley Periodicals LLC.

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