Does small aneurysm size predict intraoperative rupture during coiling in ruptured and unruptured aneurysms?

Abstract

Background: Aneurysm size is a possible risk factor for intraoperative rupture (IOR) during coiling procedures. We aim to determine if aneurysm size 4 mm or smaller predicts IOR. Methods: Between January 1997 and August 2010, 689 aneurysms in 595 patients were treated by coiling at a single institution. In all, 41 were excluded from statistical analysis due to missing data leaving 648 aneurysms in 562 patients. Demographic, clinical, and procedural outcomes were collected. We compared the rate of IOR in small aneurysms (≤4 mm) with larger aneurysms (>4 mm). We also compared the rate of IOR in ruptured versus unruptured aneurysms in the above categories. Results: The overall rate of IOR was 4..