Fluid drainage or delivery device for treatment site

A bioresorbable device for implantation in the body of a patient for administering fluid and/or negative pressure to a treatment site, the device comprising a bioresorbable resilient truss for holding two tissue surfaces spaced apart, the truss comprising:

• two flexible elongate wall members wound in a manner to define a channel, the two elongate wall members intersecting each other periodically at a plurality of cross-over nodes;
• and
• at least two flexible elongate bracing members, wherein each bracing member loops around the wall members or the wall members loop around the respective bracing member to mechanically link and fixably interlock each bracing member to each of the two elongate wall members at a plurality of the cross-over nodes.