Venous thrombosis of the upper limb is one of the manifestations of venous thromboembolic disease.~The epidemiology and management of upper limb venous thrombosis is much less well documented than that of lower limb venous thrombosis.~The investigators wished to provide epidemiological data concerning upper limb venous thrombosis in the hospital setting.~The researchers would like to know the prevalence of this pathology among patients hospitalized in a university hospital center. In order to obtain this prevalence, the investigators wish to carry out a monocentric cross-sectional descriptive study.~The main objective of the study is to define the prevalence of upper limb venous thrombosis in patients hospitalized at Nantes University Hospital.~The secondary objectives are to describe the epidemiology according to the patient's hospitalization sector or the endovenous medical devices used. Another secondary objective is to describe the clinical signs associated with thromboses and their characteristics.~The investigators wish to include major patients hospitalized at the Nantes University Hospital in different sectors (medical, surgical, intensive care units). After collecting the patient's non-opposition, reseachers will carry out a venous duplex ultrasonography of the upper limbs.~Data concerning the hospitalization unit, the patient's comorbidities, the presence of venous tracts or other endo-venous devices, clinical signs and duplex ultrasonography data will be collected using a standardized collection grid.
Venous thrombosis of the upper limb is one of the manifestations of venous thromboembolic disease.~The epidemiology and management of upper limb venous thrombosis is much less well documented than that of lower limb venous thrombosis.~The investigators wished to provide epidemiological data concerning upper limb venous thrombosis in the hospital setting.~The researchers would like to know the prevalence of this pathology among patients hospitalized in a university hospital center. In order to obtain this prevalence, the investigators wish to carry out a monocentric cross-sectional descriptive study.