Yan Xu,1 Yan Yin,1 Zai-Quan Yang,2 Jing Li,1 Li-Na Guo,1 Chao Ma1 

1Department of Medical Cosmetology, Cangzhou Central Hospital, Cangzhou, Hebei, 061001, People’s Republic of China; 2Department of Infectious Diseases, Cangzhou Infectious Disease Hospital, Cangzhou, Hebei, 061001, People’s Republic of China

Correspondence: Chao Ma, Email mmz109@yeah.net

Objective: To observe the clinical efficacy of microplasma radiofrequency in treating post-traumatic pigmentary deposition using VISIA quantitative analysis, an innovative approach not previously emphasized in microplasma radiofrequency studies.
Methods: Twenty patients with post-traumatic pigmentary deposition, treated at Cangzhou Central Hospital between July 2022 and December 2022, were selected. Pigmented areas were divided into four regions (A: control; B, C, D: treated with increasing energy parameters). Adverse effects (erythema, edema, micro-crusts, pruritus) were monitored at 2, 4, and 6 weeks post-treatment using CTCAE v5.0 criteria. Pigmentary deposition scores and VISIA parameters (spots, ultraviolet spots, red areas, brown spots) were evaluated.
Results: At 2, 4, and 6 weeks, Groups B, C, D showed significant reductions in pigment scores and VISIA parameters vs Group A (P < 0.05), with Group D (highest energy) achieving maximal improvement. Transient mild-moderate erythema (60– 100%), edema (40– 80%), and micro-crusts (20– 60%) occurred in treated groups, resolving spontaneously within 14 days; no severe adverse events were observed.
Conclusion: Microplasma radiofrequency significantly improves post-traumatic pigmentary deposition, with energy-dependent efficacy. Despite transient side effects at higher energies, its favorable safety profile supports clinical adoption. VISIA quantitative analysis provides robust objective evaluation, advancing standardization in pigment management.

Keywords: VISIA quantitative detection, microplasma radiofrequency, post-traumatic pigmentary deposition, clinical observation