Negative pressure wound therapy dressings including in-vivo optical sensing

A dressing for treating a tissue site with negative pressure, the dressing comprising:

• a cover comprising a first surface and a second surface;
• a wound contact layer comprising a first surface, a second surface, a peripheral portion with a plurality of apertures, and a central aperture, the second surface of the wound contact layer configured to contact a periwound region of the tissue site;
• a first film layer comprising a first surface and a second surface, the second surface of the first film layer configured to contact a wound of the tissue site;
• and
• a manifold comprising a first surface and a second surface, the manifold configured to be disposed between the second surface of the cover and the first surface of the first film layer;
• wherein the cover further comprises at least one sensor comprising a plurality of oxygen sensing molecules dissolved in a polymer matrix and being configured to change color to indicate a sensed oxygen level when the at least one sensor is acted upon by a light source.

A method of treating a tissue site with negative pressure, the method comprising:

• disposing a dressing on the tissue site, the dressing comprising:
• a cover comprising a first surface and a second surface;
• a wound contact layer comprising a first surface and a second surface, the second surface of the wound contact layer configured to contact the tissue site;
• a manifold comprising a first surface and a second surface, the manifold configured to be disposed between the second surface of the cover and the first surface of the wound contact layer;
• and
• at least one sensor comprising a plurality of parameter sensing molecules dissolved in a polymer matrix, the at least one sensor configured to indicate a sensed parameter when the at least one sensor is acted upon by a light source;
• applying negative pressure, from a negative pressure source, to the dressing;
• and
• monitoring the dressing for changes in the sensed parameter at the tissue site.