Negative pressure wound therapy device with oxygen control

A system for controlling an amount oxygen in an enclosed volume, the system comprising:

• a dressing configured to seal to tissue so as to define the enclosed volume between the dressing and the tissue;
• a housing defining an inner chamber, and including a reactor located in the inner chamber, the reactor being configured to chemically react with oxygen in the inner chamber;
• a fluid passage connecting the inner chamber and the enclosed volume allowing for a flow of oxygen between the inner chamber and the enclosed volume;
• and
• a hose,
• wherein the system is configured to allow a user of the system to select a predetermined level of oxygen to be attained in the enclosed volume by the user:
• selecting a desired length of the fluid passage among a plurality of different lengths prior to the reactor being exposed to oxygen in the inner chamber, wherein the desired length corresponds to the predetermined level of oxygen to be attained in the enclosed volume, and selecting the desired length of the fluid passage includes modifying the hose from an original length to a modified length.

A system for controlling an amount oxygen in an enclosed volume, the system comprising:

• a dressing configured to seal to tissue so as to define the enclosed volume between the dressing and the tissue;
• a housing defining an inner chamber, and including a reactor located in the inner chamber, the reactor being configured to chemically react with oxygen in the inner chamber;
• a fluid passage connecting the inner chamber and the enclosed volume allowing for a flow of oxygen between the inner chamber and the enclosed volume;
• and
• a plurality of hoses having different cross-sectional areas;
• wherein the system is configured to allow a user of the system to select a predetermined level of oxygen to be attained in the enclosed volume by the user;
• selecting a desired cross-sectional area of the fluid passage among a plurality of different cross-sectional areas, wherein the desired cross-sectional area corresponds to the predetermined level of oxygen to be attained in the enclosed volume, and selecting the desired cross-sectional area of the fluid passage includes selecting one hose from the plurality of hoses having the desired cross-sectional area and connecting the one hose to the housing and to the dressing to at least partially define the fluid passage.

A system for controlling an amount oxygen in an enclosed volume, the system comprising:

• a dressing configured to seal to tissue so as to define the enclosed volume between the dressing and the tissue;
• a housing defining an inner chamber, and including a reactor located in the inner chamber, the reactor being configured to chemically react with oxygen in the inner chamber;
• a fluid passage connecting the inner chamber and the enclosed volume allowing for a flow of oxygen between the inner chamber and the enclosed volume;
• and
• a hose connected to the housing and to the dressing to at least partially define the fluid passage,
• wherein the system is configured to allow a user of the system to select a predetermined level of oxygen to be attained in the enclosed volume by the user:
• selecting a desired cross-sectional area of the fluid passage among a plurality of different cross-sectional areas, wherein the desired cross-sectional area corresponds to the predetermined level of oxygen to be attained in the enclosed volume, and selecting the desired cross-sectional area of the fluid passage includes arranging a porous solid in the hose.