问题 单项选择题

主动脉夹层的DeBakeyⅢ型,正确的为

A.内膜破口位于升主动脉近端,夹层累及升主动脉和主动脉瓣
B.内膜破口位于升主动脉远端,夹层局限于升主动脉、主动脉弓
C.内膜破口位于左锁骨下动脉远端,夹层常向下扩展至胸主动脉或腹主动脉
D.内膜破口位于升主动脉近端,夹层累及升主动脉
E.内膜破口位于胸主动脉远端,累及腹主动脉

答案

参考答案:C

解析:从解剖学的角度,胸主动脉夹层有两种分类系统。DeBakey系统,Ⅰ型起自主动脉近端,同时累及升主动脉和降主动脉;Ⅱ型局限于升主动脉;Ⅲ型局限于降主动脉。斯坦福系统:A型胸主动脉夹层累及升主动脉,而B型不累及。相对简单的斯坦福分类系统更为实用,因为升主动脉是否受累与治疗方法的选择和预后有关。有60%~70%的胸主动脉夹层是A型的。

探究题

       良好的班集体是同学们健康成长的重要条件,同学们都关心、热爱自己的班集体,希望自己的班集体更加优秀,请你分别用墨、儒、道、法、兵家的代表为班集体的建设提出合理化建议。

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

                                                                                                                                                            

问答题