Subarachnoid Hemorrhage New CT Typing Former Communicating Artery Aneurysm Rupture In The Clinical Significance

Objective To explore a new classification of subarachnoid hemorrhage (SAH) induced by the ruptured anterior communicating artery aneurysms (ACoA) according to its manifestations on CT image and its clinical value.Methods Clipping of aneurysms were performed in410patients with ruptured ACoA by author between1996.6and2013.6. SAH was classified into6types according to the manifestations of the hemorrhage on CT image.The relationship of the types with delayed cerebral ischemia (DCI),Hunt-Hess grades and the prognosis was analyzed. Results The CT classification (0-Ⅴ) was positively correlated with the patients’pro-gnosis (cure-death)(P<0.01),which become poor with the gradual increase of CT classification.The CT classification (0-Ⅴ) and the types with Hunt-Hess classification levels (0-5) were positively correlated (P<0.01).Statistical analyzing the DCI,type0,type Ⅰ and type Ⅴ were combined into one,which were only two cases.There was statistically significant difference between the combined one, type Ⅱ,type Ⅲ and type Ⅳ (P<0.05) except type Ⅲ and type IV(P>0.05).Used for predicting the occurrence of DCI,the six type can be divided into three type:Low-risk type(type0,type Ⅰ and type V),Moderate risk type(type Ⅱ),High risk type(type Ⅲand type IV).Conclusions The new classification of SAH induced by the ruptured ACoA can be used to predict the occurrence of DCI and the patients’prognosis. When used to predict the DCI, it can be divided into Low-risk type(type0,type Ⅰ and type Ⅴ),Moderate risk type(type Ⅱ),High risk type(type Ⅲand type Ⅳ).The patients’prognosis become poor with the gradual increase of CT classification.