This study demonstrates in a large sample of patients a low rate of adverse reactions after FS of great and small saphenous trunks. However, but the eventuality of exceptional but more serious complications has to be taken into account in the management of patients. A multicentre study like this one takes into account different practices and reports all possible complications, thus demonstrating the need for a common validated protocol.

Deep vein thrombosis after foam sclerotherapy of the small saphenous vein are very rare. Only 0.6% medial gastrocnemius veins thrombosis occurred in symptomatic patients. However, the anatomical pattern of the small saphenous vein should be taken into account and patients with medial gastrocnemius veins perforators and the small saphenous vein connected directly into the popliteal vein should be checked by Duplex ultrasound one or two weeks after the procedure. Recommendations based on our everyday practice and the findings of this study are suggested to prevent and treat deep vein thrombosis.

The historical centre of Porto was considered in 1996 UNESCO World Heritage due to the outstanding universal value of the site, with urban fabric and historic buildings that bear remarkable testimony to the development over the past thousand years of an important European city". In order to contribute to the maintenance of this remarkable set of buildings, with historical, architectural, constructive and heritage value, in opposition to the continuous built heritage degradation process and the population dislocation from the centre to the surroundings, NCREP -FEUP have been participating in many rehabilitation projects, analyzing the conservation state of building structural elements (stone masonry walls and timber floors and roofs). The focus of the present paper is given to the evaluation of the physical state of timber structural elements, namely to the various instruments used on the Analysis and Diagnosis phases, in particular to the non destructive (NDT), medium-destructive (MDT) and, in a certain context, destructive testing techniques.