Department of Neurosurgery, Gülhane Military Medical Academy, 06100 Etlik, Turkey.
Neurol India. 2009 Nov-Dec;57(6):777-9. doi: 10.4103/0028-3886.59476.
The retrosigmoid approach is a common route to the cerebellopontine angle and lateral clivus. Patient's head positioning just before the operation is crucial to perform the procedure effectively and safely.
The aim of the study is to determine the positional angle of the head on preoperative axial sequences of the cranial magnetic resonance imaging (MRI).
The angle between the line drawn along the petrous bone ventral to the internal auditory canal and the line drawn parallel to the dorsal face of the clivus on the axial view of MRI sequences was measured.
This method of patient positioning has resulted in minimal cerebellar retraction, less time in the preoperative preparation period and less postoperative headache and neck pain.
This method can provide quick and better exposure of the cerebellopontine angle. Preoperative measurement of positional angle on axial MRI sequences is a very simple and sufficient way to determine the angle of the head that is turned to the contralateral side.
乙状窦后入路是到达桥小脑角和颅外侧斜坡的常用入路。手术前患者头部的摆放位置对于安全有效地进行手术至关重要。
本研究旨在确定术前颅磁共振成像（MRI）轴位序列中头部的位置角度。
测量 MRI 序列轴位观上，沿内听道腹侧的岩骨画的线与平行于斜坡背面的线之间的夹角。
这种患者定位方法导致小脑回缩最小，术前准备时间更短，术后头痛和颈部疼痛更少。
这种方法可以提供更快更好的桥小脑角显露。术前在轴位 MRI 序列上测量位置角度是确定向对侧转头角度的一种非常简单且充分的方法。
