Title: Applied Anatomy of Venous System of the Petrous Apex in Keyhole-endoscopic Surgery
Abstract: [Objective] To provide more detailed microanatomic information of venous system of the petrous apex for keyhole-endoscopic surgery. [Methods] The venous system of the petrous apex was microscopically measured in 20 sides of 10 adult cadaveric heads fixed in formalin. [Results] ①Latero-trigeminal venous structure (LTVS): A dural venous canal was present in most individuals examined along the lateral margin of the Meckel's cave. The upper side of the canal communicated with the superior petrosal sinus, and the lower communicated with the pterion venous plexus in the oval foramen along the lateral margin of Gasserian ganglion and the mandibular nerve. ②Petrosal vein: Most of the veins were located dorsolateral to the trigeminal nerve root. The distance between the vein and the nerve root was 0~15.80mm(4.80±3.21mm). None of nerve root was compressed by the vein. The communication between the vein and the superior petrosal sinus (SPS) was mostly found in one third medial and middle to the SPS. ③Venous channels of the petrous apex (PAV): 65 percent of the petrous apex bone was found to be diploetic, 30 percent pneumatic, both of which were dissected venules inside. Surrounded by air spaces or bone marrow spaces, most of venules communicated with the cavernous sinus and the inferior petrosal sinus. [Conclusion] The more detailed microanatomic information of the LTVS, the petrosal vein, and the PAV are provided, thus making keyhole-endoscopic procedure more minimally invasive.
Publication Year: 2008
Publication Date: 2008-01-01
Language: en
Type: article
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