Effects of adhesive dressings on the stratum corneum of the skin.

Two human models were developed to quantify the stratum corneum removed by different adhesive dressings and to measure the peel force of dressing removal and relate this to stratum corneum removal. The first was an open study designed to compare the effects of applying Mepiform Safetac, Tielle and Duoderm Extra Thin to the skin of 12 normal volunteers aged 19-53 years. Treatments were applied once (one 24-hour application) or three times (three x 24-hour applications) to forearm skin which had been prestained with methylene blue. After dressing removal the dye left on the skin was sampled using the skin surface biopsy method and measured spectrophotometrically. The results show that, after one and three applications, the Mepiform Safetac sites had a higher level of dye than those on which the other dressings had been applied (p < 0.05, after three applications). Based on the assumption that the more dye is left on the skin, the less damage is caused, this suggests that Mepiform Safetac is less damaging to the skin surface than the other products tested. In the second study the peel force needed to remove adhesive dressings from prestained skin was measured and related to the amount of stratum corneum removed. Mepilex Border Safetac, Duoderm Extra Thin, Allevyn Adhesive, Biatain Adhesive and Tielle Hydropolymer Dressing were compared in 20 normal volunteers aged 23-64 years. Three consecutive 24-hour applications of each product were made, with measurements of peel force at 24, 48 and 72 hours. The amount of dye remaining on the skin at 72 hours was assessed by the surface biopsy method. Statistically significant differences between products were observed in terms of both peak force and steady state force of removal. Differences in the level of damage to the superficial stratum corneum were also detected. However, low levels of peel force were not always associated with low damage and, therefore, other factors must contribute to stratum corneum removal in this model.

RCT Entities:   Population Interventions Outcomes