The management of unruptured and asymptomatic intracranial aneurysms remains controversial. Since aneurysmal hemorrhage carries a high risk of mortality and morbidity it is essential to estimate the probability of aneurysm rupture in each individual case in order to decide whether treatment should be recommended. The likelihood that a given aneurysm will rupture has been the subject of many scientific studies. Tha largest studies looking at the behavior of unruptured aneurysms are ISUIA (International Study of Unruptured Intracranial Aneurysms) and UCAS (Unruptured Cerebral Aneurysm Study) - a Japanese undertaking
Below you will find two aneurysm calculators designed to make the data from these two trials easily accessible. Please read the guidance notes below the calculators for a detailed explanation of how the calculators work and their limitations.