A venous valve is bicuspid (acquiring two leaflets) and is fashioned by an infolding of part of the tunica intima on either side on the lumen from the veins. The leaflets are strengthened with collagen, and elastic fibres, and lined with endothelium.[10] The endothelial cells about the surfaces with the http://sgvascularctr.com/understanding-venous-leak-treatment-in-singapore/