Research of correlative factors between the ultrasonography of trauma-caused deep venous free-floating thrombus of lower limbs and the prognosis

Abstract

Objective To analyze the color Doppler ultrasonography of trauma-caused deep venous free-floating thrombus(FFT) of lower limbs, discuss the relations between sonography and the prognosis. Methods Clinical data and color Doppler ultrasound examination results of 130 cases with trauma-caused deep venous FFT of lower limbs were retrospectively analysed. Univariate analysis was conducted to identify the statistically significant factors of patients′ prognosis, non-conditional logistic regression analysis was performed to analyse the independent prognostic factors of FFT. Results The non-conditional logistic regression analysis showed that the position of FFT, thrombosis edge definition, floating degree and the volume of detouring blood around the thrombus were independent factors of patients′ prognosis(P<0.05). The FFT prognosis of iliofemoral vein was more likely to be fixed than the FFT prognosis of popliteal vein. The FFT prognosis with blurring edges was more likely to be fixed. The more obvious the floating degree of FFT, the higher chance that the FFT prognosis is recanalized. More detouring blood flow around FFT indicated more possibilities that the prognosis could be recanalized. Conclusions The color Doppler ultrasound is able to evaluate the relations between the deep venous free-floating thrombus of lower limbs and prognosis of the patients, which is beneficial for early detection and early treatment, as well as reducing mortality and disability resulted from deep venous thrombus during the orthopaedic perioperative period. Key words: Ultrasonography, Doppler, color; Deep venous thrombosis; Free-floating thrombus; Prognosis