后鼓室乳突切除术收缩闭塞

                               
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Edited video showing a retraction pocket after an obliteration mastoidectomy. Very popular in the past, the obliteration techniques consisted in closing completely with "bone pate" the mastoid cavity. These procedures are becoming more popular once again, however using endoscopes we can understand better the buffer role of pressure regulation in both mastoid air cells/mucosa and Eustachian tube. If you "destroy"/drill this system you may have problems at the future. More informations