Saphenous vein graft surgery involves removing a section of your saphenous vein and grafting it onto the tunica albuginea to enlarge its capacity. The saphenous vein, which runs down the inside of the thigh, is easy to access and sections of this vein have been used as the conduit of choice for heart bypass surgery for decades. The tunica albuginea is the thin but very tough elastic tissue that encases the corpus cavernosa. If the penis were a blood vessel, the tunica albuginea would be its wall. More than any other component, it is the capacity of the tunica albuginea that determines your dick’s size. The skin will stretch larger and the corpus cavernosa will grow to fill the space. Expand the tunica and you expand the dick. At least that’s the theory. The saphenous vein makes an ideal donor material for tunica grafts because the tissues are very similar in structure and thickness. Because it’s so thin, the graft quickly establishes a blood supply from the underlying lumen of the corp