Biological incorporation of the mesh. Biological incorporation of the mesh. The left-hand panels are of placement of a sleeve of the mesh around the carotid artery of a sheep, and its appearance after five months. The macroscopic and histological appearances, with H&E and elastica stain are in the subsequent panels. The mesh is incorporated, the vascular architecture is preserved and the endothelium never interfered with.26 Tom Treasure et al. Heart 2014;100:969-975 Copyright © BMJ Publishing Group Ltd & British Cardiovascular Society. All rights reserved.