Abstract
<h3>Purpose</h3> Evaluate the perforation rates of Cook Celect and Günther Tulip retrievable IVC filters on follow-up CT studies and compare with the perforation rate of permanent IVC filters. <h3>Materials and Methods</h3> Retrospective review of IVC filters placed at our institution between 1/1/2007 and 10/30/2010. Patients with ≥1 follow-up CT studies performed after infrarenal placement of a Celect or Tulip filter were included. The follow-up CT studies were independently evaluated by two observers for IVC perforation (filter leg extending > 3mm beyond the IVC wall). Any discrepancies were resolved by an experienced Interventional Radiologist. The perforation rates were compared with literature perforation rates for permanent IVC filters (0-41%). <h3>Results</h3> 924 retrievable IVC filters were placed in 465 males (50.3%) and 459 females (49.7%) with average age of 60 years (range 16-105). Interobserver agreement was substantial with a Cohen's kappa=0.61. The perforation rates of Celect and Tulip filters were not significantly different (two proportion Z-test, p > 0.05). The perforation rates for the retrievable filters were comparable to the literature perforation rates of permanent filters at the first follow-up. The Celect and combined perforation rates were significantly higher than the highest permanent filter perforation rate in the literature (41%) at the last follow-up (one tailed binomial test, p < 0.01). <h3>Conclusion</h3> Our data show two retrievable IVC filters (Celect and Tulip) have similar perforation rates. There is a trend that the retrievable filter perforation rate increases with time from placement, from comparable to the literature perforation rates of permanent filters at the first follow-up (median 32 days) to higher than the literature perforation rate at the last follow-up (median 112 days). <h3>Reference</h3> ACR-SIR practice guideline for the performance of inferior vena cava (IVC) filter placement for the prevention of pulmonary embolism. Revised 2010 (Resolution 46). Table 1
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