Effectiveness and Safety of Micro-Plasma Radiofrequency Treatment Combined With Autologous Chyle Fat Grafting Treatment for Hypertrophic Scars: A Retrospective Study

Background: Hypertrophic scar (HS) is a fibroproliferative disorder resulting from abnormal healing of skin tissue after injury. Although various therapies are currently employed in clinical to treat HSs, there is no widely accepted standard therapy. Micro-plasma radiofrequency (MPR) and autologous chyle fat grafting are emerging treatments for this condition, and they have demonstrated promising therapeutic outcomes in clinical applications. The aim of this study is to investigate the effectiveness and safety of combining MPR with autologous chyle fat grafting for the treatment of HSs.

Methods: We performed a retrospective study on patients diagnosed with HS in a single center between January 2020 and December 2023. According to the treatments, patients were divided into three groups, with 6 months follow-up. The single therapy group received MPR alone for two times. The combined therapy Group 1 first received the MPR treatment followed by the combined treatment. The combined therapy Group 2 first received the combined treatment and then received the MPR treatment. The effectiveness of treatment was evaluated using the Vancouver Scar Scale (VSS) and the Patient Scar Assessment Scale (PSAS). The Visual Analog Scale (VAS) was used to assess the patients' pain on the day of treatment and 1 day after treatment. Adverse events and complications were recorded to assess the safety of treatment.

Results: A total of 73 patients diagnosed with HS were enrolled in this study, including 35 patients in the single therapy group, 18 patients in the combined therapy Group 1, and 20 patients in the combined therapy Group 2. After the treatments were completed, all three groups exhibited significant effectiveness. The two combined therapy groups scored lower after treatments in the VSS, which includes height, vascularity, pliability, and total scores, as well as in the PSAS, which includes color, stiffness, thickness, and total scores, compared to the single therapy group, with a statistically significant difference. Regarding pain response to treatment, there was no statistical difference in VAS among the three groups. No statistical difference in the overall incidence of adverse events was observed among the three groups, and no severe complications were recorded.

Conclusions: This study revealed the combination of MPR and autologous chyle fat grafting showed superior effectiveness compared to MPR alone in treating HSs, without any observed increase in overall adverse event frequency. For patients diagnosed with HS, this combination therapy stands as a promising and effective clinical intervention.