A non-contact wound covering for covering a wound. A peripheral sealing ring is covered by a barrier layer and this assembly is attached to the skin with an adhesive. The barrier layer and peripheral sealing ring together define a treatment volume over the wound. The barrier layer may include active...http://www.google.com.tw/patents/US6241697?utm_source=gb-gplus-share專利 US6241697 - Wound covering
