Celect Vena Cava Filter Clinical Trial

Inclusion Criteria: * The patient is at high risk for pulmonary embolism and is under consideration for placement of a permanent or short-term IVC filter. * The patient must have a patent internal jugular vein. * The patient or guardian must have given informed consent. * The patient must agree to return for clinical imaging follow-up at 1, 3, 6, and 12 months. * The patient must agree to have a clinical and imaging examination performed prior to filter retrieval. * The patient must agree to return for clinical and imaging follow-up at 30 days and 3 months after filter retrieval. Exclusion Criteria: * The patient is less than 18 years of age. * The patient is pregnant. * The patient has uncontrollable coagulopathy. * The patient has a life expectancy less than 6 months. * The patient has a vena cava diameter over 30 mm, measured by vena cava sizing catheters. * The patient's vena cava diameter is less than 15 mm, measured by vena cava sizing catheters. * The patient has a contrast allergy that can not be adequately pre-medicated. * The patient is simultaneously participating in another investigative drug or device study, or has a previous IVC filter.