Optional inferior vena cava filter retrieval with retained thrombus: an in vitro model

Journal of Vascular and Interventional Radiology : JVIR
Kenneth J KolbeckS William Stavropoulos

Abstract

Retrieval of an optional inferior vena cava (IVC) filter with retained thrombus may result in pulmonary emboli if the trapped thrombus is not removed along with the filter. An in vitro model was developed to determine the fate of trapped thrombus during filter removal. An in vitro IVC flow model was created with 25-mm inner diameter tubing and a 50% glycerol/water solution. Three different optional filters-Recovery (Bard, Tempe, AZ), Günther-Tulip (Cook Inc., Bloomington IN), and OptEase (Cordis Endovascular/Johnson & Johnson, Warren, NJ)-were evaluated in the study. A known mass of mature thrombus (porcine, aged 1 wk) was trapped within the optional filters. The filters were then retrieved according to the manufacturers' protocol, and the mass of thrombus recovered with the filter was determined. For each filter, five iterations were performed with initial thrombus sizes less than 1 g (group A) and an additional five iterations with initial thrombus sizes greater than 1 g (group B). Thrombi from group A were statistically significantly smaller than those from group B (P < .0001). Retrieval of the Recovery filter resulted in an average of 25% (range, 0%-53%) and 4% (range, 0%-7%) of the clot being removed in group A and group B...Continue Reading

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Mar 1, 2007·Journal of Vascular and Interventional Radiology : JVIR·Stephen L WangJohn A Kaufman

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