Endoscope-assisted Microanatomy And Clinical Application: Post-craniotomy Of Keyhole Approach

Objective: The purpose of the present study was to observe the structures of the quadrigeminal cistern via suboccipital-transtentorial key hole approach and infratentorial-supracerebellar key hole approach;, To refine the transcerebe llomedullary fissure approach to the fourth ventricle and to clarify the optimal method of dissecting the fissure to obtain an appropriate operative view without splitting the inferior vermin; To observe the spatial relationships between main blood vessels and nerves in the cerebellopontine angle area and internal acoustic canal region and jugular foramen region. Provide anatomic basis for lateral and posterior skull base minimal invasive via retrosigmoid keyhole approach. Methods: The authors studied the microsurgical anatomy by using eight cadaver specimens formal in-fixed specimens using magnification and endoscope, after perfusion of the arteries and veins with colored siliconeto determine the most appropriate method of dissecting the cerebellomedullary fissure. While dissecting the spaces around the tonsils and making incisions in the ventricle roof, the procedures used to expose each ventricle wall were studied. The fissure was further separated into two slit spaces on each side: namely the uvulotonsillar and medullotonsillar spaces. The floor of the fissure was composed of the teal chloride, inferior medullar velum, and lateral recess, which form the ventricle roof. These precise dissections allowed for easy retraction of the tonsil and provided a sufficient view of the ventricle wall such that the deep aqueduct region and the lateral region around the lateral recess could be seen without splitting the vermin. By modeling operated of the suboccipital-transtentorial key hole approach and infratentorial-supracerebellar key hole approach The mastoid tip and the assertion...