Photomicrographs of hematoxylin & eosin stained tissue samples surrounding bare Tygon tubing (left column) and Tygon coated with porous Tecoflex PU (center column) or porous, DX-releasing PU (right column). N=3 separate implants for each material. Reprinted from Acta Biomaterialia, 2014, 10, Vallejo-Heligon, Klitzman, B; Reichert, W. M. “Characterization of porous, dexamethasone-releasing polyurethane coatings for glucose sensors” pages 4629–4638, Copyright 2014, with permission from Elsevier.