Study of IVC Filter Retrieval With the Günther Tulip Vena Cava Filter

Inclusion Criteria: * Patient must be considered at high risk for PE, but placement of a permanent IVC filter is not likely to be required. * Patient must have a patent internal jugular vein. * Patient has given informed consent. Exclusion Criteria: * Patient is less than 18 years. * Patient has a pre-existing filter * Patient had indications for a permanent filter at the time of the initial evaluation. * Patient has uncontrollable coagulopathy. * Patient has a short life expectancy \< 6 months. * Patient has metastatic malignancy. * Patient has a vena cava diameter over 30 mm, measured by vena cava sizing catheters. * Patient has a contrast allergy that cannot be adequately pre-medicated. * Patient is at risk of septic embolism. * Patient has sepsis. * Patient has a hypersensitivity to any of the components of the GT filter, specifically cobalt, nickel, and chromium. * Patient has impaired renal function (creatinine \> 2.0). * Patient is pregnant or planning to become pregnant within the next 6 months