The etiological diagnosis of subarachnoid hemorrhage caused by aneurysm

Objective:To explore the value of CT angiography(CTA) in the etiological diagnosis of subarachnoid hemorrhage(SAH) caused by aneurysm.Methods:Twenty-four spontaneous SAH patients diagnosed by CT plain scan were detected for comparative analysis using CTA and digital subtraction angiography(DSA).Results:Twenty-two cases with 26 aneurysms in 24 cases were found by CTA.CTA displayed the location,size,shape,neck and surrounding tissue of aneurysm.Using DSA as the gold standard,the sensitivity and specificity of CTA were 92.86% and 100.00% respectively.Conclusions:CTA can be a preferred method for the early etiological diagnosis of SAH patients,especially for critical patients.