Fig. 2

CD31 immunostaining (dark brown) of the endothelium of no-touch and conventional saphenous veins. a Top panels show a folded intima of a non-distended NT SV with an intact endothelium. b The intima of a CV SV has collapsed due to the high pressure distension used at harvesting with various regions of endothelial denudation evident. c: Shows a transverse section of a NT SV with intense staining of endothelial cells both of the lumen (_*) and the vasa vasorum located within the tunica media (TM), adventitia (ADV) and capillaries within the perivascular adipose tissue (PVAT). From Dashwood et al. 2013, which is acknowledged [9]