title: Investigating the pressure-reducing effect of wound dressings.
abstract: OBJECTIVE
  Currently, polyurethane foam dressings are commercially available from many manufacturers. However, the pressure-reducing effect is expected to differ by the formulation and combination of the main and secondary ingredients and by manufacturing method. In this study, we investigated the effects of pressure reduction using dressing materials with various structural characteristics, including polyurethane foam dressings based on the engineering point of view, focusing on the dry state.
  
  
  METHODS
  Pressure was measured in a model that simulated compression on the sacral region in a decubitus position. Pressure was measured for different dressings: ten products, consisting of five types of material (polyurethane foam, hydropolymeric, Hydrofiber, hydrocolloid, and low-adherent absorbent).
  
  
  RESULTS
  All dressings used in this study showed significantly reduced pressure. ALLEVYN Non-Adhesive had the lowest pressure at 35.833 ± 1.155 mmHg, and DuoDERM Extra Thin CGF had the highest pressure at 66.867 ± 1.060 mmHg. The pressure of the control was 74.667 ± 1.405 mmHg. The other dressings were: ALLEVYN Adhesive: 44.233 ± 0.777 mmHg; ALLEVYN Gentle Border: 46.967 ± 1.537mmHg; Mepilex Border: 53.867 ± 0.231 mmHg; Biatain Silicone: 56.000 ± 0.520 mmHg; TIELLE: 57.267 ± 3.403 mmHg;Versiva XC: 65.900 ± 0.800 mmHg; DuoDERM CGF: 57.267 ± 1.007 mmHg; and Melolin: 53.433 ± 1.973 mmHg.
  
  
  CONCLUSIONS
  The pressure-reducing effect of dressing differs not only by material type but also by product. That is, the pressure-reducing effect can differ even if the dressings are of the same material type, such as polyurethane foam. Our study investigated only the effect of materials and structural characteristics on the cushion of dressings in the dry state. Therefore, further investigation is needed to confirm the effect of pressure reduction by dressing to meet the conditions in the clinic.
authors.affiliation: Department of Plastic and Reconstructive Surgery, Keio University School of Medicine, Tokyo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Matsuzaki
authors.affiliation: Department of Plastic and Reconstructive Surgery, Keio University School of Medicine, Tokyo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Kishi
mesh_terms: D047070:Bandages, Hydrocolloid; D001696:Biomechanical Phenomena; D006801:Humans; D008422:Materials Testing; D009779:Occlusive Dressings; D011140:Polyurethanes; D012879:Skin Physiological Phenomena; D014947:Wounds and Injuries / Q000451:nursing*
chemical_list: D011140:Polyurethanes; C028279:polyurethane foam
keywords: Pressure ulcer; foam dressing; polyurethane; pressure reducing