The dressing 900 includes a sterile porous substrate 910, which can be fabricated from polyurethane foam, polyvinyl alcohol foam, gauze, felt or other suitable material; a semi-permeable adhesive cover 132 such as that sold under the trademark Avery Denison???; a single-lumen drainage tube 122 for the application of vacuum and removal of fluids from the woundsite; single-lumen irrigation tube 125