TY - JOUR
T1 - Quantitative Anterior and Posterior Clinoidectomy Analysis and Mobilization of the Oculomotor Nerve during Surgical Exposure of the Basilar Apex Using Frameless Stereotaxis
AU - Dogan, Aclan
AU - Cetas, Justin S.
AU - Anderson, Gregory J.
AU - Rekito, Andy
AU - Delashaw, Johnny B.
N1 - Publisher Copyright:
© 2017 Georg Thieme Verlag KG Stuttgart.New York.
PY - 2017/8/1
Y1 - 2017/8/1
N2 - Background Anterior and posterior clinoidectomies have been proposed to augment exposure of the basilar apex. A sequential quantitative benefit analysis offered by these maneuvers has not been reported. Methods Fourteen datasets from eight cadaveric specimens were analyzed. A modified orbitozygomatic frontotemporal craniotomy was performed. The extent of proximal control of the basilar artery was determined through the exposed opticocarotid and carotidoculomotor triangles before and after clinoidectomies and mobilization of the third nerve at the porous oculomotarius. Results Removal of the anterior and posterior clinoids significantly improved proximal basilar artery access (p < 0.012) and increased the opticocarotid triangle and carotidoculomotor triangle areas (p < 0.017). Surgical freedom increased inferosuperiorally in the opticocarotid triangle following anterior clinoidectomy (p < 0.047) and in carotidoculomotor triangle following posterior clinoidectomy (p < 0.047). Mobilization of the third nerve increased surgical freedom in the mediolateral projection of the carotidoculomotor triangle (p < 0.047). Conclusion Anterior and posterior clinoidectomies significantly improved the area of exposure of the opticocarotid triangle, carotidoculomotor triangle, and the exposed length of the basilar artery available for proximal control. This improvement is extremely important for large or giant aneurysms of the upper basilar artery or aneurysms hidden by the posterior clinoid.
AB - Background Anterior and posterior clinoidectomies have been proposed to augment exposure of the basilar apex. A sequential quantitative benefit analysis offered by these maneuvers has not been reported. Methods Fourteen datasets from eight cadaveric specimens were analyzed. A modified orbitozygomatic frontotemporal craniotomy was performed. The extent of proximal control of the basilar artery was determined through the exposed opticocarotid and carotidoculomotor triangles before and after clinoidectomies and mobilization of the third nerve at the porous oculomotarius. Results Removal of the anterior and posterior clinoids significantly improved proximal basilar artery access (p < 0.012) and increased the opticocarotid triangle and carotidoculomotor triangle areas (p < 0.017). Surgical freedom increased inferosuperiorally in the opticocarotid triangle following anterior clinoidectomy (p < 0.047) and in carotidoculomotor triangle following posterior clinoidectomy (p < 0.047). Mobilization of the third nerve increased surgical freedom in the mediolateral projection of the carotidoculomotor triangle (p < 0.047). Conclusion Anterior and posterior clinoidectomies significantly improved the area of exposure of the opticocarotid triangle, carotidoculomotor triangle, and the exposed length of the basilar artery available for proximal control. This improvement is extremely important for large or giant aneurysms of the upper basilar artery or aneurysms hidden by the posterior clinoid.
KW - anterior clinoidectomy
KW - basilar apex
KW - carotidoculomotor triangle
KW - opticocarotid triangle
KW - posterior clinoidectomy
KW - third nerve mobilization
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U2 - 10.1055/s-0036-1597813
DO - 10.1055/s-0036-1597813
M3 - Article
AN - SCOPUS:85011702047
SN - 2193-634X
VL - 78
SP - 295
EP - 300
JO - Journal of Neurological Surgery, Part B: Skull Base
JF - Journal of Neurological Surgery, Part B: Skull Base
IS - 4
ER -