Optional or permanent: clinical factors that optimize inferior vena cava filter utilization

Area of Science:

• Vascular Surgery
• Interventional Radiology
• Cardiovascular Medicine

Background:

• Inferior vena cava (IVC) filters are used to prevent pulmonary embolism.
• Deciding between temporary and permanent IVC filter placement is crucial.
• Predictive factors for IVC filter permanence are not well-established.

Purpose of the Study:

• To determine if patient parameters at the time of IVC filter placement can predict filter permanence.
• To develop a predictive model for IVC filter disposition.

Main Methods:

• Retrospective review of 265 optional IVC filters placed between 2008 and 2011.
• Patient parameters including age, sex, VTE history, neurologic disease, malignancy, and indication for placement were analyzed.
• Multiple logistic regression was used to identify predictors of filter removal versus permanence.

Main Results:

• Of 265 filters, 167 were removed and 98 were kept permanent.
• Predictors for permanence included older age, male sex, malignancy, and anticoagulation failure.
• Predictors for removal included VTE history, prophylactic indication, and high-risk VTE.
• The prediction model achieved a c-statistic of 0.80.

Conclusions:

• Patient parameters effectively predict whether an optional IVC filter will be kept permanent.
• These findings can guide prospective decision-making for IVC filter placement.
• Optimizing IVC filter use based on individual patient risk factors is feasible.