Predicting outcome following surgical treatment of unruptured intracranial aneurysms: a proposed grading system

Journal of Neurosurgery
R K KhannaN Qureshi

Abstract

Surgical treatment of unruptured aneurysms is gaining increased support owing to the recently defined poor long-term natural history of these aneurysms. The benefit of treatment ultimately depends on the relative risk of subsequent aneurysm rupture in untreated patients versus the risk of surgery. To identify those patients at a higher risk from surgery, the authors reviewed the management of 172 patients with unruptured intracranial aneurysms treated at their institution. The size of the aneurysms ranged from 3 to 45 mm (mean 13.7 mm). Twenty-two patients (12.8%) had aneurysms in the posterior circulation, and 32 (18.6%) of these were giant aneurysms. Major morbidity occurred in 12 patients (6.9%) and five patients (2.9%) died. Multivariate logistic analysis of several risk factors revealed that aneurysm size and location had an independent correlation with surgical outcome and that patient age approached statistical significance. Patients presenting with ischemic cerebrovascular disease, in particular, did not have a higher risk of a poor outcome. A simple classification for predicting patients at high risk from surgical morbidity and mortality is proposed. Preoperative grading is based on the size and location of the aneurys...Continue Reading

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