Comparative analysis of coincidence rate of HRCT diagnosis and surgical diagnosis of traumatic dislocation of anvil sta-pes joint

XU Chongyang; LI Hongzhen; ZHU Chuanfeng; ZHANG Xiuli; LIU Congtao

Abstract：Objective To analyze the HRCT features of traumatic dislocation of the incus and stapes joint.Methods In this wirk,we conducted a retrospective analysis of 14 patients with traumatic dislocation of the anvil and stapes joint confirmed by surgery,made the original CT image of the patients,performed routine axial,coronal,oblique and three-dimensional recon-struction,observed the dislocation of the incus and stapes joint and the injury of the incus and stapes,and compared with intra-operative diagnosis.Results Compared with the intraoperative diagnosis,7 cases were diagnosed with CT for the separation of the incus and stapes,9 cases were diagnosed intraoperatively,and the diagnostic accuracy rate was 77.78%.3 cases of complex dislocation of the anvil and stapes joint were diagnosed by CT,5 cases were found by operation,and the diagnostic accuracy rate was 60%.4 cases of dislocation of incus were diagnosed by CT,and 7 cases were found by operation.The diagnostic accuracy rate was 57.14%.None of stape dislocation was diagnosed by CT and 1 case was found by operation.The diagnostic accuracy rate was 0;CT diagnosis 2 cases of incus and stapes fractures were diagnosed by CT,and 4 cases were found by operation.The diag-nostic accuracy rate was 50%.Conclusion Through the comparison and analysis of HRCT diagnosis and surgical results of os-sicular injury and dislocation of the incus and stapes,the cause of missed diagnosis can be found out,which is helpful to improve the diagnostic accuracy of dislocation of the incus and stapes.