P-012 Rates of complications of embolising intracranial aneurysms over time: Do we continue to improve with experience?

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In this study our aim was to assess the change in complication rates for endovascular coil embolization of intracranial aneurysms over the course of our interventional neuroradiologists' careers.


Data was collected on all intracranial aneurysm embolization procedures performed were retrieved from a retrospectively maintained database. All intraoperative complications were gathered. They were categorized into: 1. major complications (consisting of haemorrhagic and thromboembolic events) and 2. Non-major and technical complications (such as stent and coil migration and coil breakage). Time was divided into 3 months increments (quarters) from the date an attending started work as an interventional neuroradiology Attending. The data was visualised as percentage of complications over time (Figure 1).


The complication rate for major complication at 1, 3, 5, 10, 15 years was: 5.0%, 6.8%, 7.0%, 6.0% and 5.25% respectively. All complications (Major, non-major and technical) at 1, 3, 5, 10 and 15 years were 9.2%, 9.4%, 9.3%, 8.4% and 7.0% respectively. Complications rates were higher in the first 30 months of an interventionalist attending's career and decreased thereafter.


There was a gradual drop in complication rates with experience long after an attending has completed fellowship training. This complication rate seems to level off after about 6 years of training, which was longer than the authors expected.


M. Crimmins: None. A. Banihashemi: None. P. Gobin: None.

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