Prevalence and Clinical Consequences of Fracture and Fragment Migration of the Bard G2 Filter: Imaging and Clinical Follow-up in 684 Implantations |
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| Affiliation: | 1. Imaging Institute, Section of Interventional Radiology, Cleveland Clinic, 9500 Euclid Ave, Cleveland, OH 44195;2. Department of Quantitative Health Sciences, Cleveland Clinic, 9500 Euclid Ave, Cleveland, OH 44195;1. Peninsula Radiology Academy, Plymouth, UK;2. Derriford Hospital, Plymouth, UK;1. Division of Vascular and Interventional Radiology, Duke University Medical Center, Box 3808, Durham, NC 27710;2. Department of Radiology, Duke University Medical Center, Box 3808, Durham, NC 27710;1. Department of Radiology, Massachusetts General Hospital;2. Division of Interventional Radiology, Massachusetts General Hospital;3. Division of Angiography and Interventional Radiology, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts;4. Department of Interventional Radiology, University of Texas Southwestern Medical Center, Dallas, Texas;1. Department of Radiology, Division of Vascular and Interventional Radiology, Medical College of Wisconsin, 9200 W Wisconsin Avenue, Milwaukee, WI 53226;2. Department of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine, Medical College of Wisconsin, 9200 W Wisconsin Avenue, Milwaukee, WI 53226;3. Department of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine, Aurora Baycare Medical Center Clinic, Green Bay, Wisconsin;4. Department of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine, Oregon Health and Science University, Portland, Oregon;5. Department of Obstetrics and Gynecology, Marshfield Clinic, Marshfield, Wisconsin;1. Department of Radiology, Sahlgrenska University Hospital, Gothenburg, Sweden;2. Department of Radiology, Institute of Clinical Sciences, The Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden;3. Department of Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden;4. Department of Radiation Physics, Institute of Clinical Sciences, The Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden |
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| Abstract: | ![]()
PurposeTo investigate the prevalence and clinical sequelae of G2 filter (Bard Peripheral Vascular, Tempe, Arizona) fractures and fragment migration.Materials and MethodsPatients who underwent G2 filter placement between October 2005 and February 2010 were assessed for filter fractures and complications. Fracture prevalence was estimated at various time points based on data from patients with known fracture status.ResultsAmong 829 patients who underwent G2 filter placement, 684 had follow-up imaging and qualified for the study (381 men and 303 women; average age, 60.3 y; range, 15.8–95.2 y). For 541 (79%) patients, at least one image was available that contained the filter (imaging follow-up interval, 14.9 mo ± 20.0; range, 0–78.6 mo); images that did not include the filter but may have shown the migrated fracture fragment were available for 143 (21%) patients (follow-up interval, 11.2 mo ± 19.3; range, 0–83.4 mo). There were 16 fractured limbs identified in 13 patients (incidence, 1.9%; follow-up interval, 30.4 mo ± 18.7; range, 5.5–76.5 mo). Fracture fragments were identified in the pulmonary arteries (n = 4), right ventricle (n = 2), pericardium (n = 1), iliac vein (n = 1), and kidney (n = 1). Four fracture limbs remained near the filter; the remaining three could not be located. All patients with filter fracture were asymptomatic. The estimated 5-year fracture prevalence was 38% (95% confidence interval, 22.9%, 54.8%).ConclusionsThe early occurrence of G2 filter fractures was low, but the incidence increased over time. No life-threatening events occurred in patients with filter fracture during the study time frame. |
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