| Popis: |
Objective: Supratrochlear and infratrochlear triangles are surgical corridors for approaching the lateral wall of the cavernous sinus. The literature provides conflicting results for the morphology and morphometry of these triangles. Additionally, the possible effects of vascular structures that drain into the cavernous sinus in unknown. This study aimed to investigate the morphology, morphometry, and vascular relationships of the supratrochlear and infratrochlear triangles of the cavernous sinus. Material and Method: Cranial bases of 25 cadavers were dissected bilaterally under a surgical microscope. Five of the cadavers were injected with colored silicone for vascular evaluation. The morphology of supratrochlear and infratrochlear triangles were classified according to the course of the trochlear nerve. Photogrametric measurements were used for evaluating the areas of both triangles with the ImageJ software. The triangular morphology was also investigated in regard to the drainage patterns of the superficial middle cerebral vein and cranial base dural sinuses. Results: Type A, B, C, and D triangle morphology was present on 23 (46%), 9 (18%), 10 (20%), and 8 (16%) sides, respectively. The average areas for supratrochlear and infratrochlear triangles were 22.2 (±11.7) mm2 and 78.4 (±27.7) mm2 , respectively. The supratrochlear triangle was significantly larger in Type D triangles. On 71.4% of injected specimens, the superior petrosal sinus contributed the cavernous sinus and formed a Type A triangle. Conclusion: The anatomy of the supratrochlear and infratrochlear triangles are highly variable than previously reported. Introducing the knowledge regarding these variations to neurosurgical residency education programs and daily surgical practice could be valuable. |
