Many different and ingenious caval filters are currently available on the market for clinical use. The perfect filter has yet to be developed. It appears likely that caval filters do reduce the incidence of PE, but may result in IVC thrombosis and a higher incidence of recurrent lower extremity DVT than what is seen with anticoagulation alone. Prospec
TABLE 46.2 Comparison of Various IVC Filters
Type of F.U. Recurrent IVC Migration Misplacement
Filter (ref) Carrier evaluation No. (mos.) PE thrombosis DVT rate (%) rate (%)
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