Wound therapy system with in-line orifice

A wound therapy system, comprising:

• a dressing sealable over a wound and defining a wound space;
• a conduit comprising a first inner diameter, wherein the conduit is fluidly communicable with the wound space;
• a canister fluidly communicable with the conduit, wherein the canister, the conduit, and the dressing define a sealed space comprising the wound space;
• a therapy unit coupled to the canister and comprising:
• a pneumatic pump fluidly communicable with the sealed space;
• a sensor configured to measure a pressure in the sealed space;
• a valve positioned between the sealed space and surrounding environment and controllable between an open position and a closed position;
• and
• a control circuit configured to:
• control the pneumatic pump to remove air from the sealed space to establish a negative pressure in the sealed space;
• receive measurements of the pressure in the sealed space from the sensor;
• and
• determine a volume of the wound space based on the measurements of the pressure;
• and
• a bellows fluidly communicable with the pneumatic pump and the canister, the bellows comprising:
• a plate having a first end and a second end, wherein the plate defines a plate lumen having a plate lumen diameter extending between the first end and the second end;
• an insert defining an insert lumen extending through the insert and having an insert lumen diameter, wherein the insert lumen diameter is less than the plate lumen diameter, and wherein the insert is disposed at the first end of the plate such that the insert lumen aligns with the plate lumen;
• and
• an overmold disposed over the insert and at least partially over a length of the plate defined between the first end and the second end of the plate, wherein the overmold substantially secures the insert relative the plate.