Catheter-directed thrombolysis for lower extremity deep venous thrombosis:Report of a national multicenter registry

PURPOSE: To evaluate catheter-directed thrombolysis for treatment of sympto matic lower extremity deep venous thrombosis (DVT). MATERIALS AND METHODS: From a registry of patients (n = 473) with symptomat ic lower limb DVT, results of 312 urokinase infusions in 303 limbs of 287 p atients (137 male and 150 female patients; mean age, 47.5 years) were analy zed. DVT symptoms were acute (less than or equal to 10 days) in 188 (66%) p atients, chronic (>10 days) in 45 (16%), and acute and chronic in 54 (19%). A history of DVT existed in 90 (31%). Lysis grades were calculated by usin g venographic results. RESULTS: Iliofemoral DVT (n = 221 [71%]) and femoral-popliteal DVT (n = 79 [25%]) were treated with urokinase infusions (mean, 7.8 million IU) for a m ean of 53.4 hours. After thrombolysis, 99 iliac and five femoral vein lesio ns were treated with stents. Grade III (complete) lysis was achieved in 96 (31%) infusions; grade II (50%-99% lysis), in 162 (52%); and grade I (<50% lysis), in 54 (17%). For acute thrombosis, grade III lysis occurred in 34% of cases of acute and in 19% of cases of chronic DVT (P < .01). Major bleed ing complications occurred in 54 (11%) patients, most often at the puncture site. Six patients (1%) developed pulmonary emboli. Two deaths (<1%) were attributed to pulmonary embolism and intracranial hemorrhage. At 1 year, th e primary patency rate was 60%. Lysis grade was predictive of 1-year patenc y rate (grade III, 79%; grade II, 58%; grade I, 32%; P < .001). CONCLUSION: Catheter-directed thrombolysis is safe and effective. These dat a can guide patient selection for this therapeutic technique.