Inferior vena caval filter insertion prior to bariatric surgery: a systematic review of the literature.

Placement of inferior vena cava filters (IVCFs) is considered in many patients undergoing bariatric surgery. Their placement is driven by a high rate of pulmonary embolism (PE), uncertainty as to the effectiveness of pharmacologic prophylaxis, and a lack of alternate methods to prevent pulmonary embolism. We performed a systematic review of the literature to evaluate the evidence supporting placement of IVCFs in patients undergoing bariatric surgery. Eleven studies were identified; none were randomized trials. Descriptive analysis suggests that IVCFs reduced PE; however, the strength of this observation is tempered by the lack of use of effective forms of prophylaxis and the failure to account for complications of IVCF placement. We conclude, pending the results of controlled studies, that the use of IVCFs cannot be recommended for routine patients undergoing bariatric surgery.