Abstract
BackgroundThe incidence of deep venous thrombosis is 0.6/1000 habitants and when symptomatic its diagnosis by duplex scan has 100% sensitivity and 98% specificity.ObjectivesThe aim of this study was to evaluate the findings of the duplex scan in patients with clinical suspicion of deep venous thrombosis.Methods239 consecutive outpatients (59.2 ± 18.6 years, 164 female) were evaluated by duplex scan.ResultsAccording to symptoms 101 (42.3%) were related to the right lower limb; 113 (47.3%) to the left lower limb; and 25 were related to both lower limbs. Forty-eight patients presented a normal duplex scan. Venous thrombosis was found in 117 patients (0.49; CI 0.43–0.55): 75 with deep venous thrombosis (DVT), 22 with superficial venous thrombosis (SVT) and 20 with both DVT and SVT. Other pathologies were found in 74 patients. Among patients with DVT the most involved veins were below the knee. Among patients with SVT, 20 (47.6%) showed progression to the deep venous system: 9 (45%) by perforans veins; in 6 by saphenous-femoral junction (30%); and in 5 (25%) by saphenous-popliteal junction.ConclusionDeep venous and superficial venous thromboses were diagnosed in 49% of cases. In 30.9% of cases, the duplex scan indicated other pathologies.
Highlights
The incidence of deep venous thrombosis is 0.6/1000 habitants and when symptomatic its diagnosis by duplex scan has 100% sensitivity and 98% specificity
We performed this study to evaluate the findings of duplex scan in patients with clinical suspicion of deep venous thrombosis (DVT)
Venous thrombosis was found in 117 patients (0.49; CI 0.43–0.55): 75 with DVT, 20 with both superficial venous thrombosis (SVT) and DVT, and 22 with SVT alone
Summary
The incidence of deep venous thrombosis is 0.6/1000 habitants and when symptomatic its diagnosis by duplex scan has 100% sensitivity and 98% specificity. Deep venous thrombosis (DVT) is a frequent and potential fatal disease with estimated incidence of 0.6 cases per 1000 inhabitants/year in our environment; 0.8 cases per 1000 inhabitants/year in the USA; and 0.9 cases per 1000 inhabitants/year in Sweden [1]. The diagnosis of symptomatic deep venous thrombosis (DVT) is well established using duplex scanning, with a sensitivity of 100% and specificity of 98% for proximal DVT, and 94% sensitivity and 75% specificity for distal venous (page number not for citation purposes).
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