Excimer laser assisted complex inferior vena cava filter retrieval: a single institution's experience over 6 years.

To investigate inferior vena cava (IVC) filter retrievals and the use of the excimer laser sheath to assist in complex cases. Retrospective analysis was undertaken of 181 attempted filter retrievals over a 6 year period. Pre- and perioperative imaging was analysed from both standard retrieval and complex retrieval techniques. One hundred and eighty-one IVC filter retrievals were attempted: 130 (72%) standard retrievals were successful and 51 (28%) failed due to device endothelialisation. Forty (23%) cases then had subsequent successful complex retrieval under general anaesthetic. Eighteen (45%) cases were removed with the sling technique and 22 (55%) cases using the excimer laser dissection technique. Where preoperative venography/computed tomography (CT) demonstrated embedding of the filter feet versus filter apex, this was predictive of requiring dissection techniques versus sling technique (13/18 patients; p<0.05 chi-squared test). The difference in device indwelling time was statistically significant between the successful standard retrieval group (134 days) versus patients who failed standard retrieval and required complex techniques (243 days; p=0.00018). Standard retrieval techniques failed in 28% of cases. This correlated with devices that were indwelling for longer. When imaging demonstrated filter-feet endothelisation/perforation, this was predictive of requiring dissection techniques with the excimer laser.

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