[Role of venous valves in the etiology of essential varices]. / Consideraciones acerca del papel de las válvulas venosas en la etiología de las varices esenciales.

A study about the valvular system disposition into the Saphena Interna was effectuated and comparison between patients with a varicose syndrome and non-varicose cadavers was made. From the results, we believe that we are in conditions to conclude that neither the number of valves into the saphena interna nor the development of an atrophy on a valve normally constituted are associated with the apparition of essential varicosities.

[Study of the great saphenous vein system. The historical approach; its origin and course; a description of 2 new collaterals]. / Estudio del sistema de la vena saphena magna. Aproximación histórica; origen y trayecto; descripción de dos nuevas colaterales.

An historical review of the evolution in the venous system study up to the time when venous system function was appropriately understood, is presented. Also, by standard dissection technics, different morphologic features of Magna saphenous vein (origin, trajectory and termination) are reviewed and concrete reference places are proposed in order to localize the Magna saphenous vein at ankle or inguinal level, places were the named vein is frequently aborted for surgical canalization or stripping procedures. Finally, the study of internal saphenous collaterals allowed to know about two undescribed vessels located in the lower limb (venous lateral arch and subperiosteal branch), vessels with a physiopathological relevance since Perforans veins drain to them and, in case of insufficiency, the risk of a varicose syndrome at their areas will be high.