Abdominal treatment systems, delivery devices, and methods

A system for treating an abdominal cavity with reduced pressure, the system comprising:

• an abdominal treatment device for distributing reduced pressure to a tissue site, the abdominal treatment device comprising:
• a plurality of liquid-impermeable layers, wherein the liquid-impermeable layers have a coextensive area A1 and are fenestrated,
• a micro-channel space between the liquid-impermeable layers;
• a foam spacer disposed between the liquid-impermeable layers, the foam spacer having a plan-view area A2, the foam spacer comprising an elliptical central member, a plurality of arced members concentric with the elliptical central member, each arced member connected to the elliptical central member by a linear member;
• a target fluid removal zone defined by an area bound substantially by an outer peripheral edge of the foam spacer;
• wherein A2 is less than 80% of A1,
• wherein the foam spacer is configured such that, under reduced pressure, a location in the micro-channel space experiences reduced pressure vectors over an angle theta (θ) that is at least 300 degrees;
• and
• a reduced-pressure source fluidly coupled to the abdominal treatment device.