Fracture Rate and Serious Complications of Vena Cava Filters

Myles M. Mitsunaga, Hyo-Chun Yoon

John A. Burns School of Medicine, University of Hawaii, Honolulu, USA.
Kaiser Foundation Hospital, Honolulu, USA.

DOI: 10.4236/ojrad.2013.32013                

Abstract

Purpose: To retrospectively evaluate the prevalence of fracture and fragment embolization of inferior vena cava (IVC) filters. Methods: Electronic medical records and imaging studies of all Kaiser Permanente patients who received IVC filters from August 2000 until August 2010 were retrospectively reviewed for filter complications. Results: 283 patients received an IVC filter during the study period. 143 patients were deceased, while 140 are living. Among deceased patients, the average age at the time of death was 69.8 ± 15.3 [range: 24.7 - 99.2] years; 55.9% were men; the mean implantation-to-image time was 13.6 ± 20.6 [range: 0 - 92.4] months, and there were no reported major complications attributable to filter migration or fracture at a mean of 16.8 ± 24.8 [range: 0 - 119.6] months following implantation. One of 14 (7.1%) G2 filters perforated the aorta, which already had a stent graft in place. Among those patients still living, the average age was 67.3 ± 15.2 [range: 15.2 - 97.3] years, 47.1% were men, the mean implantation-to-image time was 33.3 ± 36.5 [range: 0.1-141.7] months, and there were no reported major complications at a mean of 35.3 ± 36.5 [range: 0 - 141.7] months following implantation. Three of 60 (5.0%) Trapease filters were found to have at least 1 strut fracture. There were no cases of filter migration or fragment embolization. The overall fracture rate of all filters with an implantation-to-image-time greater than two years (mean implantation-to-image time 4.7 ± 2.7 [range: 2.0 - 11.8] years) was 3 of 67 (4.5%). Bard G2 and G2X filters had a 0% fracture and embolization rate at a mean of 19.0 ± 16.6 [range: 0.07 - 49.5] months after implantation. Conclusions: IVC filters, regardless of type, have a low prevalence of fracture and we found no cases of fragment embolization.

Keywords

Venous Thromboembolism; Inferior Vena Cava; IVC Filters; Pulmonary Embolism; Deep Venous Thrombosis; Complications

Conflicts of Interest

The authors declare no conflicts of interest.

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