Occlusion refers to covering the skin by any means of film or substance;1 this extends to wound dressings, which can be differentiated as being fully occlusive or semi-occlusive. Wounds are either covered or left exposed to air and while studies have shown that occlusion may speed the healing process of wounds faster than air exposure,2,3 completely occlusive dressings have some disadvantages, particularly when compared to semi-occlusive dressings.4 For instance, if bacteria are trapped under the wound dressing, the fully occlusive dressing provides a warm and moist environment for the bacteria to reproduce, potentially leading to infection.5
Evaluating Water Permeability and Occlusion in Wound Dressings and Topical Cosmetics
Jul 1, 2009 | Contact Author | By: Hongbo Zhai, MD, and Howard I. Maibach, MD, University of California
Your message has been sent.
(click to close)
Abstract: The present study uses an evaporimeter to measure the degree of water loss from in vitro skin samples covered by occlusive and semi-occlusive wound dressings to serve as a model for determining the effectiveness of occlusive cosmetic formulations. The purpose of this work was to develop a model for determining the effectiveness of occlusive cosmetic formulations.
Figure 1. TEWL changes with dressings of variously degreed occlusivity.
Data was shown as mean ±SD of TEWL (g/m2/h).
Z-COTE LSA provides broad-spectrum protection from long wave UVA rays and medium wave UVB rays by physically scattering, reflecting and absorbing solar radiation.
- Zinc Oxide
- UVA, UVB Sunscreen
- UVA Protection
- UVB Protection