From the Journals

Dual-frequency ultrasound promising for refractory rosacea


Dual-frequency ultrasound (DFU) may be an effective option for patients with treatment-resistant rosacea, according to a new study in Dermatologic Surgery.

In the study, a retrospective medical record analysis of 42 rosacea patients, DFU improved symptoms, including erythema index (EI) and transepithelial water loss (TEWL), and also improved outcomes on the patient self-assessment (PSA), reported Jun Yeong Park, MD, and coauthors, from the department of dermatology, Hallym University Sacred Heart Hospital in Anyang, South Korea.

Of the 42 patients, 26 had erythematotelangiectatic rosacea, 14 had papulopustular rosacea, and 2 had mixed disease; their mean age was 48 years, and they had had rosacea for a mean of 2 years. Patients had started DFU treatment between September 2016 and December 2016, and were not taking oral medication (besides antihistamines), topical ointments, or other laser treatments at the time. Most had been treated with various systemic therapies, topical therapies, or lasers, but had not had adequate improvement of flushing and erythema.

Patients received DFU treatment of the entire face twice per week for the first week, followed by one-week intervals, for a total of 12 weeks. Each treatment session lasted 10 minutes, and included DFU frequencies of 3/4.5 MHz at an ultrasound intensity of 2.0W/cm2 for 5 minutes, followed by 4.5 MHz at an intensity of 2.0W/cm2. Responses to treatment were based on EI, TEWL values (measured on three different sites on each cheek according to guidelines established by the European Group for Efficacy Measurements on Cosmetics and Other Topical Products), and PSA. PSA was completed on a scale of 0 (absent) to 4 (severe) for erythema, itching sensation, and burning sensation.

At 12 weeks follow-up, the mean EI dropped from 16.3 at baseline to 12.7 at 12 weeks (P less than .01). Mean TEWL values dropped from a baseline of 35.8 g m–1 h–1 to 22.8 g m–1 h–1 at 12 weeks (P less than .01).

When evaluated by rosacea subtype, a slightly higher reduction in the group with papulopustular rosacea was seen for EI and TEWL, compared with those with the erythematotelangiectatic subtype, but the differences were not statistically significant for either, the authors reported.

Between baseline and 12 weeks, the PSA values for erythema decreased from 2.6 to 1.1. Itching and burning grades also decreased, from 2.4 to 0.4 and from 2.4 to 0.3, respectively.

The findings verify that there were “improvements in the barrier function of patients with refractory rosacea, based on the TEWL level before and after treatment,” the authors noted. “Therefore, DFU may be an additional treatment option for rosacea that is resistant to other treatments.”

This study is the first to evaluate DFU in patients with refractory rosacea “who did not show signs of recovery after undergoing previous therapies,” they noted.

No disclosures were reported.

SOURCE: Park J et al. Dermatol Surg 2018 Sep;44(9):1209-15. doi: 10.1097/DSS.0000000000001552.

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