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

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