Reduced-pressure wound treatment systems and methods employing manifold structures

A reduced-pressure wound treatment system for treating a tissue site on a patient, the system comprising:

• a manifold structure for disposing proximate the tissue site, the manifold structure being deformable and comprising:
• a plurality of spaced longitudinal members,
• at least one shaped projection coupled to at least one of the longitudinal members for creating a microstrain at the tissue site, and
• the at least one shaped projection comprising a columnar member having a distal end and an enlarged member positioned at the distal end of the columnar member, wherein the columnar member has a first outer diameter (D1), and wherein the enlarged member has a second outer diameter (D2), and wherein the second outer diameter of the enlarged member is greater than the first outer diameter of the columnar member (D2>D1);
• a sealing member for placing over the tissue and manifold structure and operable to form a fluid seal over the tissue site and the manifold structure;
• a reduced-pressure subsystem for delivering reduced pressure to the sealing member;
• wherein the manifold structure is adapted to deform more in a first direction than in a second direction upon being subjected to a reduced pressure, the plurality of longitudinal members of the manifold structure being adapted to move laterally towards one another to deform the manifold structure in the first direction, the first direction being substantially perpendicular to the longitudinal members;
• and
• wherein the first direction and the second direction are substantially coplanar.