Introduction: Natural rate of aneurysm rupture remains controversial, especially for small aneurysms. Centers frequently choose to follow rather than treat aneurysms < 7 mm. We aim to study the safety of observation in patients with small UIAs followed in Saskatchewan.
Methods: We conducted a retrospective review of all patients presenting between July 2008 and February 2014 with unruptured intracranial aneurysms. Aneurysm characteristics recorded included size, location, presentation, and follow-up imaging. Multiple aneurysms in a single patient were considered independently.
Results: Of the 203 UIAs < 7 mm, 25 were treated, while mean follow-up time was 12.3 months for followed aneurysms, with two incidences of rupture. Of the 88 UIAs = 7 mm, 42 (48%) were treated. Mean follow-up time for followed aneurysms was 8.2 months, and there was one incidence of rupture during follow-up.
Conclusions: Treatment decision paradigms used in our center showed low rates of rupture in untreated aneurysms less than < 7 mm. We advocate a
Patient Care: Established safety of conservative management in small unruptured intracranial aneurysms will reduce patient anxiety towards their diagnosis, and expand management options. Our unique perspective, with long term follow-up at a single center, allows for the study of natural rates of aneurysm rupture in a North American population.
Learning Objectives: By the conclusion of this session, participants should be able to: 1. Discuss the rates of aneurysm rupture as reported in the literature; 2. Weigh the risks of