Unidirectional controlled flow due to collapsible vessels in the penis

A blood vessel exposed to external pressure was modeled using analytical expressions describing pressure-flow and pressure-area relations of the vessel. These expressions describe a behavior of a unidirectional leaky valve. The vessel model was used to represent arteries and veins in the penis. Combined with a compliant chamber representing the corpus cavernosum, the model demonstrates the valve action of the partially collapsed vessels in a specific configuration during penile erection.