Wound dressings and systems for effluent management of topical wound therapy and related methods

1. A system comprising:

a dressing comprising:

a gas-occlusive layer configured to be coupled to tissue surrounding target tissue such that an interior volume is defined between the gas-occlusive layer and the target tissue; and

a body defining one or more ports configured to provide fluid communication to the interior volume through the gas-occlusive layer;

a therapeutic gas source configured to be coupled to the dressing in fluid communication with the interior volume to provide therapeutic gas to the interior volume, the therapeutic gas source comprising an oxygen concentrator configured to receive atmospheric air and remove nitrogen from the air;

a container outside the interior volume, the container comprising a sidewall that defines a chamber configured to be coupled to the dressing in fluid communication with the interior volume to receive therapeutic gas effluent from the interior volume;

a negative pressure source configured to be coupled to the container such that the negative pressure source can be activated to draw fluid from the interior volume through the chamber of the container; and

a diluent gas source configured to be coupled to the system between the interior volume and the negative pressure source to deliver a diluent gas to dilute the therapeutic gas effluent as or after the therapeutic gas effluent flows out of the interior volume, the diluent gas the nitrogen removed from the air by the oxygen concentrator.

2. The system of claim 1 , wherein the container comprises an outlet in fluid communication with the negative pressure source, the outlet having a filter configured to filter fluid that flows through the outlet.

3. The system of claim 2 , wherein the filter comprises a layer of material that is bonded to the sidewall of the container.

4. The system of claim 3 , wherein the filter is configured to permit communication of the therapeutic gas effluent out of the chamber through the outlet and restrict communication of exudate out of the chamber through the outlet.

5. The system of claim 1 , where the diluent gas source comprises a reservoir containing the diluent gas, wherein the reservoir is configured to be coupled to the container in fluid communication with the chamber to provide the diluent gas to the chamber.

6. The system of claim 1 , wherein the container comprises a first one-way valve configured to:

permit communication of gas out of the chamber through the first valve; and

prevent communication of gas into the chamber through the first valve.

7. The system of claim 1 , wherein the diluent gas source comprises a second one-way valve in fluid communication with the chamber and configured to:

permit communication of the diluent gas into the chamber through the second valve; and

prevent communication of the diluent gas out of the chamber through the second valve.

8. The system of claim 1 , wherein the chamber comprises one or more baffles, impellers, and/or a screw mixer configured to encourage mixing of the diluent gas and the therapeutic gas effluent within the chamber.

9. The system of claim 1 , comprising one or more first conduits configured to be coupled between the therapeutic gas source and the dressing to permit fluid communication of the therapeutic gas between the therapeutic gas source and the interior volume.

10. The system of claim 9 , comprising one or more second conduits configured to be coupled between the dressing and the container to permit fluid communication of the therapeutic gas effluent between the interior volume and the chamber.

11. The system of claim 10 , wherein at least one of the one or more first conduits and/or at least one of the one or more second conduits comprise one or more valves configured to block fluid communication in the respective conduit through the valve in response to detecting a fire within the respective conduit.

12. The system of claim 10 , comprising one or more third conduits configured to be coupled between the diluent gas source and at least one of the one or more second conduits to permit fluid communication of the diluent gas between the diluent gas source and the chamber.

13. The system of claim 12 , comprising one or more fourth conduits configured to be coupled between the diluent gas source and the container to permit fluid communication of the diluent gas between the diluent gas source and the chamber.

14. The system of claim 13 , comprising one or more fifth conduits configured to be coupled between the diluent gas source and the dressing to permit fluid communication of the diluent gas between the diluent gas source and the body defining the one or more ports of the dressing.

15. The system of claim 14 , comprising one or more sixth conduits configured to be coupled between the diluent gas source and the negative pressure source to permit fluid communication of the diluent gas between the diluent gas source and the negative pressure source.

16. The system of claim 15 , wherein the body defining the one or more ports comprises a valve assembly having:

a first inlet configured to be in fluid communication with the interior volume and to receive the therapeutic gas effluent from the interior volume;

a second inlet configured to be in fluid communication with the diluent gas source to receive the diluent gas from the diluent gas source; and

an outlet configured be coupled to the container in fluid communication with the chamber to permit fluid communication of the diluent gas and the therapeutic gas effluent into the chamber.

17. The system of claim 16 , wherein:

the one or more second conduits is configured to be coupled between the container and the outlet to permit fluid communication of the therapeutic gas effluent between the outlet and the chamber of the container; and

the one or more fifth conduits is configured to be coupled between the therapeutic gas source and the second inlet to permit fluid communication of the diluent gas between the therapeutic gas source and the second inlet.