Majority of Pulmonary Thromboembolism (PE) results from clot fragmentation of lower limb Deep Venous Thrombosis (DVT) . Non-invasive testing of the lower limb, such as Compression Ultrasonography (CUS), is the gold standard for the routine diagnosis of DVT. Free-Floating Thrombus (FFT) is present in 10-26% of thrombi detected with ultrasound and is often considered being a risk factor for PE in patients with DVT. To the best of our knowledge, this is the first report in the medical literature on 3 cases illustrating the detrimental consequence of mechanical compression effect on lower limb DVT. Using Doppler sonography, vein patency can be evaluated with dynamic tests that increase or accelerate venous flow: compression of muscles upstream from the probe or limb rising produces enhanced Doppler signals in normal veins. A free-floating thrombus (FFT) may be detected in 10-26% of thrombi detected with ultrasound and is considered a risk factor for pulmonary embolism . Few cases where dislodged FFT caused PE have been reported.
Anne AL Hsu, Pulmonary Embolism-A Mechanical Compression Effect on Lower Limb Deep Venous Thrombosis
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Last date updated on September, 2014