Wound therapy system with instillation therapy and dynamic pressure control

A method of treating a wound, comprising:

• providing an instillation pump in fluid communication with a dressing, the dressing comprising:
• a wound contact layer configured to minimize adherence of the dressing to a wound bed;
• a perforated layer comprising a plurality of holes extending therethrough, the wound contact layer configured to be coupled to the perforated layer;
• an intermediate layer configured to manifold fluid, the perforated layer configured to be coupled to the intermediate layer on a side opposite the wound contact layer;
• and
• a drape configured to be disposed over the intermediate layer and seal over the wound bed;
• providing a negative pressure pump in fluid communication with the dressing;
• providing at least one scrub cycle, the at least one scrub cycle comprising:
• supplying, by the instillation pump, a first amount of the instillation fluid to the dressing;
• waiting for a first soak period;
• and
• operating the negative pressure pump to create a cyclic variation of negative pressure at the dressing and generating cyclic deformation of the wound bed into the perforated layer at the plurality of holes between a first height relative to surrounding tissue and a second height relative to surrounding tissue;
• and
• providing at least one instillation cycle, the at least one instillation cycle comprising:
• controlling the negative pressure pump to provide a constant negative pressure;
• controlling the instillation pump to provide a second amount of the instillation fluid;
• and
• providing a second soak period.

A wound therapy system, comprising:

• a dressing comprising:
• a wound contact layer configured to minimize adherence of the dressing to a wound bed;
• a perforated layer comprising a plurality of holes extending therethrough, the wound contact layer configured to be coupled to the perforated layer;
• an intermediate layer configured to manifold fluid, the perforated layer configured to be coupled to the intermediate layer on a side opposite the wound contact layer;
• and
• a drape configured to be disposed over the intermediate layer and seal over the wound bed;
• an instillation pump fluidly communicable with the dressing and configured to provide instillation fluid to the dressing;
• a negative pressure pump fluidly communicable with the dressing and configured to remove air from the dressing;
• and
• a control circuit communicably coupled to the instillation pump and the negative pressure pump and configured to:
• provide at least one scrub cycle, the at least one scrub cycle comprising:
• controlling the instillation pump to provide a first amount of the instillation fluid to the dressing;
• providing a first soak period;
• and
• controlling the negative pressure pump to provide a variation of negative pressure at the dressing, the variation characterized by a waveform, the variation of negative pressure generating variation in deformation of the wound bed into the perforated layer at the plurality of holes between a first height relative to surrounding tissue and a second height relative to surrounding tissue;
• and
• provide at least one instillation cycle, the at least one instillation cycle comprising:
• controlling the negative pressure pump to provide a constant negative pressure;
• controlling the instillation pump to provide a second amount of the instillation fluid;
• and
• providing a second soak period.