| Purpose meeting to the needs of the dinical operation we had the research on the applied anatomy, imaging sectional anatomy and three-dimensiaonel reconstruction aboutnasolacrimal canal operation via nasal under endoscope. After that ,we want to have a quick,secure and easier operation margin and sum the adaption to it so that we provide the reliable anatomy data and means for the diagnosis and endoscopic operation on the diseasde of nasolacrimal canal. We have done this work so as to successfully carrying out this operation and inducing the complications.Material and Methods (1) Apllied anatomy study: 20 adult cadaver deads were sdelected randomized (male 14, female 6) , we cut these heads along the line of the middle axial and brain tissue were remmoved. The course of nasolacrimal canal, the location and shape of the canal inferier osdtium, the adjacent relation between the canal and other nasal related structure were studied: the length , the upper ostiums diameter the diameter of the canal middle portion ,the diameter of the inferior ostium, the angle of elevation, the distance between the front margin of the inferior ostium and the front margin of the inferior ostium and nat, the distance between the front margin of the inferior ostium and the front nasal spine, the distance between the front margin of maxillary sinus ostium and the posterior margin of the canal. The overall recorded data was treated statistically by the SPSS microsoft. (2) The study of sectional CT imaging analagy: The adult cadaver deads were scanned via CT with OM axial plane and the special coronal plane which is located between the outstanding portion of the frontal tuber and the front nasal spine that is anteversion by 9° , The thickness of every scanning section is 2mm. The length of nasolacrimal cannal was measured and the scanned sectional layer of the cannal was studied. (3) The study of thuee-dimensional reconstruction... |
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