Clinical experience with superior vena caval Greenfield filters.

Abstract

Purpose: To evaluate the results of superior vena caval (SVC) Greenfield filters in patients at risk for pulmonary embolism (PE) secondary to upper extremity deep venous thrombosis (UEDVT).

Methods: Over a 46-month period, 26 patients (10 men, mean age 67 years, range 25 to 89) with UEDVT in whom anticoagulation was contraindicated (n = 22) or ineffective in preventing recurrent PE or extension of the thrombus (n = 4) were treated with placement of SVC Greenfield filters.

Results: One SVC filter was misplaced into the innominate vein but left in place; this vein remains patent after 2 months without evidence of filter migration. Follow-up ranged from 10 days to 46 months (mean 7.8 months). Fifteen (58%) patients died inhospital of causes unrelated to the SVC filter or recurrent thromboembolism (mean time to death 36 days). Of the 11 survivors, follow-up ranged from 1 to 38 months (mean 22). Sequential chest roentgenograms in 9 (82%) patients revealed no filter migration or displacement. No evidence of PE was found in any of the survivors over the course of follow-up.

Conclusions: Insertion of SVC Greenfield filters is a safe and feasible therapy to prevent recurrent thromboembolism in patients with UEDVT who are refractory to or inappropriate for anticoagulation therapy.