5 % are higher than the superior edge of endolymphatic sac . 3 . by retrolabyrinthine approach , rectangle incision of duramater got 116 . 80 mm2 surgery scope
2.
Super - posterior semicircular canal resection s scope is wider than posterior semicircular canal resection and could treat internal acoustic meats lesions too . conclusion : we get the scope of the two different incisions of duramater . study the effect of the sigmoid sinus , jugular bulb and cerebellopontine angle area to retrolabyrinthine approach surgery
3.
Methods : to divide the anatomic area into several parts : sigmoid sinus , jugular bulb , semicircular canal , internal acoustic meats , cerebellopontine angle area , duramater . simulated the partial labyrinthectomy and endoscopic surgery on 20 adult cadaveric specimens , measured correlative data , observed correlative anatomic structure . all data analysied by sas
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