Dressings and methods for treating a tissue site on a patient
Dressings, systems, and methods for treating a tissue site on a patient involve allowing liquids from the tissue site or a priming fluid to evaporate and exit the dressing through a liquid-impermeable, vapor-permeable membrane. The dressing is able to process more liquids than would otherwise be possible without evaporation and potentially to create reduced pressure. Other dressings, systems, and methods are disclosed.
1. A dressing for treating a tissue site, the dressing comprising:
a foam member configured to be positioned adjacent the tissue site;
a container having a priming fluid, the container disposed over the foam member;
a covering disposed over the container and configured to form a sealed space over the tissue site;
an evaporative window disposed over the container; and
a liquid-impermeable, vapor-permeable membrane covering the evaporative window.
2. The dressing of claim 1 , wherein the container includes a weakened portion configured to fail before other portions of the container.
3. The dressing of claim 1 , wherein the covering further comprises a release liner disposed over the evaporative window, the evaporative window configured to be disposed between the container and the release liner.
4. The dressing of claim 1 , wherein the container is configured to rupture, releasing the priming fluid into the foam member, the priming fluid configured to evaporate from the foam member, creating a reduced pressure within the sealed space.