The Anatomical Study Of Operational Spaces In Cerebellopontine Angle Via Retrosigmoid Approach

Objective:Under microscope to microanatomical study cerebellopontine angle, observe and measure the bouncary, area, content and relationship about important structure of the operational spaces, in order to offer microanatomical reference for operation through microneurosurgery and endoscope about disease in CPA.Method:The anaomy of the anantomy spaces in cerebellopontine angle via retrosigmoid approach was studied in 15 adult cadaver brains under microscope, the observation and measure was operated on the bouncary, area and contents of the three anatomical spaces.the outcomes were analyzed with SPSS10.0 software.Result:The anatomy was operated in 30 cases cadaver brains under microscope via retrosigmoid approach. to observe and microanat- omical measure the three operational spaces, the data was obtained about anatomical spaces′s size and area in SPA in normal, to identify and protect the important contents in spaces, in order to enrich clinical microanatomical information about CPA.Conclusionretrosigmoid approach is frequently used in order to resect the tumor in CPA. we can observe the three operational spaces and the important structures in CPA clearly. therefore to be familiar with the important structures in CPA and master the anatomical feature about the nerves(cranial nerve V, VI,Ⅶ,Ⅷ, IX, X, X)and the arteries (SCA, AICA, PICA, LA), we can locate the important nerve in operation exactly,and master the arteries′s anatomical feature,and protect blood supply about brain tissue and nerves. So we can improve conservation of the important nerves and arteries in SPA and decrease the complications after operation and degrade operative mortality.