Modular negative pressure wound therapy systems

A system for treating a tissue site, the system comprising:

• a dressing configured to be positioned at the tissue site;
• a therapy device comprising a pump and a wireless communication device, the pump configured to generate a negative pressure and to provide the negative pressure to the dressing through a negative pressure pathway;
• and
• a pressure sensing device configured to be fluidly coupled to the dressing through a sensing pathway and at a sensing location external to the therapy device, the sensing pathway fluidly isolated from the negative pressure pathway and the therapy device, the pressure sensing device further configured to wirelessly communicate a pressure signal from the sensing location to the wireless communication device.

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

• obtaining a therapy device comprising:
• a pump configured to deliver negative pressure,
• a pump pressure sensor configured to sense a pressure at the pump,
• a first wireless communication device, and
• a controller configured to control the pump;
• obtaining a pressure sensing device comprising:
• a printed circuit board,
• a therapy pressure sensor configured to sense a pressure at the tissue site,
• an ambient pressure sensor configured to sense an ambient environment pressure, and
• a second wireless communication device configured to wirelessly communicate a pressure signal to the first wireless communication device, wherein the pressure signal includes a therapy pressure value corresponding to the pressure at the tissue site and an ambient pressure value corresponding to the ambient environment pressure;
• fluidly coupling the pump to a dressing disposed at the tissue site;
• fluidly coupling the pressure sensing device to the dressing disposed at the tissue site;
• actuating the pump to deliver negative pressure to the dressing;
• and
• monitoring, with the pressure sensing device, the dressing while the pump is delivering negative pressure to the dressing.