Abstract: A dressing includes an application site covering and an oxygen scavenger provided with or positioned with respect to the application site covering so as to remove oxygen from a volume beneath the application site covering and around an application site covered by the application site covering. The application site covering and the oxygen scavenger are configured to maintain gas pressure beneath the application site covering around the application site that is above a therapeutic negative pressure while the oxygen scavenger is consuming oxygen beneath the application site covering.

Abstract: A reduced pressure device includes a dressing and a reactor. The dressing covers a dressing site and defines an enclosed volume beneath the dressing and around the dressing site. The reactor is disposed with respect to the dressing so as to produce a reduced pressure beneath the dressing when activated. The reactor includes a reducing agent and an electrolyte solution. The electrolyte solution is configured to be selectively delivered to the reducing agent, and the reactor begins to react with at least one selected gas in the enclosed volume after the electrolyte solution is delivered to the reducing agent to consume the at least one selected gas within the enclosed volume.