Comparison of clear effect and the complications, and short and mid

To compare the therapeutic effects of ultrasound-guided and non-guided catheter-directed thrombolysis in the treatment of deep venous thrombosis of lower extremity. From August 2015 to April 2016, 60 patients with lower extremity deep venous thrombosis were randomly divided into two groups (n？=？30 for each) to receive catheter-directed thrombolysis. Group A was treated under the ultrasound guidance, while Group B was treated without guidance. Catheter-directed thrombolysis was successfully performed by only one intubate in Group A but by 5.9 intubates in Group B. It took 15.4？±？3.2 min in Group A, significantly less than that in Group B (30.8？±？6.6 min, p？<？0.05). The incidences of hematoma were also remarkably different between the two groups (3.33% vs. 26.67%, p？=？0.026). No pseudoaneurysm or arteriovenous fistula was found in Group A, but there were two cases of pseudoaneurysm and two cases of arteriovenous fistula in Group B (both 6.67%, p？=？0.492). The circumference differences of the affected limb between before and after thrombolysis were 49.47？±？2.484 mm in Group A, significantly higher than that in Group B (28.40？±？2.856 mm, p？<？0.001). After treatment, the venous unobstructed improvement rates and deep vein patency rate were both better than those in Group B (77？+？2.603% vs. 57.23？+？1.828% and 80% vs. 46.67%, respectively; p？<？0.001). There were only three cases of PTS in Group A (10%, 3/30), but there were 11 cases in Group B (36.67%, 11/30). Ultrasound-guided catheter-directed thrombolysis has advantages, with improvement of venous patency and decrease of the incidence of PTS