Internal Carotid Artery Paraclinoid Aneurysm Surgery based on the Microsurgical Anatomy(<SPECIAL ISSUES>Veins of the Skull Base (1): Cavernous Sinus)

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  • 解剖に基づく手術の要点 : 内頸動脈paraclinoid aneurysm(<特集>頭蓋底静脈の基礎と臨床(1):海綿静脈洞-第22回微小脳神経外科解剖セミナーより-)

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Surgery for a paraclinoid aneurysm of the internal carotid artery requires precise knowledge of the anatomy of the paraclinoid region. Among them, the important bony structures include the anteior clinoid process, optic canal, optic strut. As for the vessels, the ophthalmic artery, superior hypophyseal artery and cavernous sinus, as well as the internal carotid artery, are the key structures. Membraneous structures include the dural ring, carotid cave, falciform ligament and nervous structures include the optic nerve and oculomotor nerve. Considering surgical procedures, removal of the anterior clinoid process and optic unroofing, circumferential dissection of the dural ring taking care not to injure the ophthalmic artery are key surgical procedures for use in this region. Surgical points are also described based on these anatomical characteristics.

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