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    To evaluate if the unruptured intracranial aneurysm treatment score (UIATS) is a sensitive tool to detect aneurysms at risk of rupture, we conducted an a posteriori retrospective study on ruptured intracranial aneurysms. We performed a retrospective analysis of adult patients admitted to our center from January 2010 to April 2016 with aneurysmal subarachnoid hemorrhage. The UIATS was applied to all ruptured aneurysms. Patients for whom the UIATS recommended treatment were labeled as "true positives," whereas patients for whom the UIATS recommended observation were labeled as "false negatives." Patients for whom the UIATS was inconclusive were excluded from the final analysis. Based on the UIATS recommendation, a sensitivity analysis was performed. A total of 262 patients with aneurysmal subarachnoid hemorrhage were screened. Of these, 212 were included in our analysis. Median age was 53 years (23-90). Most patients were females (n = 134, 63%), with an equal distribution between low-grade and high-grade hemorrhages (Hunt & Hess ≥ 3 n = 107, 50%). UIATS recommended treatment in n = 52, 25% cases (TP), was inconclusive in n = 93, 44% (excluded), and recommended observation in n = 67, 32% (FN). Based on these data, the UIATS showed a sensitivity of 44% (CI 35-53%). The UIATS exhibits rather low sensitivity for detecting aneurysms at risk of rupture.


    Silvia Hernández-Durán, Dorothee Mielke, Veit Rohde, Vesna Malinova. Is the unruptured intracranial aneurysm treatment score (UIATS) sensitive enough to detect aneurysms at risk of rupture? Neurosurgical review. 2021 Apr;44(2):987-993

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    PMID: 32166509

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