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. 2015 Jun 10;11(3):105–121. doi: 10.1080/15476278.2015.1038448

Figure 1.

Figure 1.

Macroscopic view and scanning electron micrographs of the triple-layered natural graft and the control graft Propaten (ePTFE). (A) macroscopic view. (B-C) cross-sections, (D-E) luminal surface morphology. The natural graft displays a 3 layered architecture with an inner elastin layer (B-1), an intermediate porous/lamellar type I collagen film for strength (B-2) and a porous outer type I collagen layer (B-3). In the PTFE graft the wall (C-1) and the supporting ring (C-2) are seen. Scanning electron microscopy reveals differences in wall thicknesses and porosity between both grafts. Luminal lining of the natural graft consists of elastin fibers (D), whereas the ePTFE graft displays lamellae with perpendicular struts (E). Bars represent 100 µm (B-C) and 10 µm (D-E). L: lumen.