Kyung-Hee Chung

Clothing temperature changes of phase change material-treated warm-up in cold and warm environments

The purpose of this study was to investigate the appropriate amounts of phase change materials to give objective and subjective wear sensations. Vapor-permeable water-repellent fabrics with (WR-PCM) and without (WR) octadecane containing microcapsules were obtained by wet-porous coating process. Then, calculating the area of the WR-PCM treated clothes, we estimated the total calories of the clothing by multiplying the heat of fusion and heat of crystallization of PCM to the calculated area. Wear tests were conducted in both warm environment (30°C, 65 % RH) and cold environment (5°C, 65 % RH) with sports warm up style experimental garments made with WR and WR-PCM fabrics. Rectal, skin, and clothing microclimate temperatures, saliva and subjective evaluation measurements were done during the wear test. There was no difference of rectal and mean skin temperatures between WR and WR-PCM, but the clothing microclimate temperature of WR-PCM under warm environment was slightly lower than that of WR. In cold environment, WR-PCM showed much higher temperature than in WR. Saliva change did not appear between clothes, but did between two environments. Although subjective sensation between WR and WR-PCM was not significantly different, WR-PCM was rated as cooler than WR in warm environment and as warmer than WR in cold environment. The results of this study indicated that octadecane containing microcapsules in water-repellent fabric provide cooling effect.

Treatment of periorbital wrinkles with 1550- and 1565-nm Er: glass fractional photothermolysis lasers: A simultaneous split-face trial

Objective  This study aimed to compare the clinical efficacies of 1550‐ and 1565‐nm Er:glass lasers in the treatment of periorbital wrinkles and to evaluate histological changes after treatment.

A case of granuloma pyogenicum presenting as an intravascular mass: evaluation by ultrasonography

© 2007 The Authors 515 JEADV 2008, 22, 499–527 Journal compilation

Eccrine naevus with clear cell syringoma

© 2008 The Authors 1151 JEADV 2008, 22, 1120–1156 Journal compilation

Desmoplastic malignant melanoma evaluated with 18F-fluorodeoxyglucose positron emission tomography-computed tomography and sentinel lymph node biopsy

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Palmar melanoma: a tertiary centre experience

after the procedure. At 12 weeks, all patients (n = 5) had appreciable degree of increase in hair counts, confirmed with investigator-evaluated improvement in GPI (40%–75%; average of 57%) (Fig. 2), trichoscopic hair count increment (48-93 HFU/cm; average of 67 HFU/cm) and patient satisfaction evaluated with VAS ranging from 4 to 8 with a mean of 6 (Table 1). Except for mild pain experienced during thread insertion (n = 5), and mild transient swelling (n = 2), the procedure was very well tolerated by all. There was no case of significant bleeding, ecchymosis, persistent pain, headache or postprocedure infection. Polydioxanone (PDO) filament, a synthetic absorbable suture prepared from polyester, poly (p-dioxanone) has high flexibility and high retention strength, is non-allergenic and has a slow absorption rate (6–8 months). The risk of bacterial colonization or infection is minimal. As a non-surgical face lift modality, threads stimulate neocollagenesis within 2–3 weeks with clinical results expected to last for 2–3 years. We preferred monofilament threads, instead of barbed/screwed. Although the exact mechanism of action of hair growth stimulation by PDO threads remains speculative, it is likely to be similar to that of microneedling, involving enhanced expression of hair-related genes, release of growth factors like PDGF and direct activation of stem cells in the hair bulge area. A randomized trial by Dhurat et al.had indeed displayed the superiority of the combination of microneedling with minoxidil over minoxidil alone in MPHL. Although this pilot study seems to offer scalp threading as a novel efficacious and safe non-surgical approach to hair regrowth, the limitations of this study including small number of cases, limited follow-up period and lack of scalp histological analysis warrant further research with controlled trials with a larger cohort. Further, the persistence of the hair growth-stimulating effect of the threads, and theoretical possibility of foreign body granuloma formation in the long term remain to be explored.