title: Optional vena cava filters: indications, management, and results.
abstract: BACKGROUND
  When anticoagulation is contraindicated or ineffective, optional vena cava filters can be used to prevent pulmonary embolism. These devices can be removed within a defined period of time or can remain in the vena cava permanently.
  
  
  METHODS
  The status of optional vena cava filters was studied by a review of the relevant literature found in a selective Medline search from 2000 to 2008, including a Cochrane review and published guidelines.
  
  
  RESULTS
  Optional vena cava filter can be removed up to 20 weeks or even longer after insertion (depending on the filter model) in a small interventional radiological procedure if therapeutic anticoagulation has been achieved or the patient is no longer at risk for venous thromboembolism. Current studies show comparable results for optional filters and permanent filters, but there have not yet been any prospective studies comparing the two filter types.
  
  
  CONCLUSIONS
  Optional vena cava filters are an important addition to the management of venous thromboembolic disease. As only limited data are available to date, the use of optional filters should be considered on an individual case basis.
authors.affiliation: Institut für Diagnostische, Interventionelle und Pädiatrische Radiologie, Inselspital, Universitätsspital Bern, Schweiz. hanno.hoppe@insel.ch
authors.forename: Hanno
authors.initials: H
authors.lastname: Hoppe
mesh_terms: D004867:Equipment Design; D006801:Humans; D011655:Pulmonary Embolism / Q000453:epidemiology* / Q000517:prevention & control*; D016896:Treatment Outcome; D016306:Vena Cava Filters / Q000706:statistics & numerical data*; D054556:Venous Thromboembolism / Q000453:epidemiology* / Q000517:prevention & control*