Retrieval rates of inferior vena cava (IVC) filters: are we retrieving enough?

The aim of this study was to document retrieval rates of IVC filters in a single tertiary centre, before and after implementation of an IVC filter pathway, and to identify factors that may affect retrieval rates.

This was a two phase study. In Phase 1, rates of IVC filter retrieval were collected retrospectively from June 2010 to June 2012. During Phase 2 an IVC filter pathway was developed and prospective data was collected from July 2012 to June 2014. Univariate analysis and Kaplan-Meier estimates were performed to determine the rate of IVC filter retrieval and to analyse factors contributing to retrieval rates.

95 patients (39 Phase 1; 56 Phase 2) had an IVC filter inserted over a 4 year period. In Phase 1, of those eligible to have their filter removed, the 12-month retrieval rate was 63%, this improved to 100% in Phase 2. Following implementation of the IVC filter pathway (Phase 2) no patients were lost to follow-up.

We have improved the rate of IVC filter retrieval in our institution by development of an IVC filter pathway. Rates of optional IVC filter retrieval in our experience are now higher than previously published figures.