Abstract：Objective To provide anatomical data of radiofrequency thermocoagulation in the treatment of V2 trigeminal neuralgia through inferior orbital fissure and foramen rotundum approach. Methods The approach through inferior orbital fissure and foramen rotundum as well as its neighboring structures were observed and measured on 160 sides of 80 adult cranium and 20 adult cadavers. Results In 160 cases of adult cranium, the number of success into foramen rotundum was 122(76.25%). The distance of the puncture point to the lateral of infraorbital margin was (0.41±0.11)cm. The distance from the puncture point to the outer edge of the foramen rotundum was (4.45±0.18)cm; the distance from the puncture point to the inner front edge of the foramen rotundum was (4.99±0.17)cm; the distance from the puncture point to the lateral of Carotid artery groove was (5.52±0.35)cm. The safe and effective depth in the adult cadavers was (5.38 ±0.25)cm; the angle between needle and median sagittal plane was 32.2°±2.3° and between needle and coronal plane was 57.2°±2.5° when it entered the foramen rotundum; the angle between needle and median sagittal plane was 26.0°±1.5° and between needle and coronal plane was 64.5°±1.6° when it entered the end of the superior orbital fissure. Conclusions According to the anatomical data, CT guided radiofrequency thermocoagulation in treatment of V2 trigeminal neuralgia through inferior orbital fissure and foramen rotundum approach is safe and effective.
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Sun Xin, Zhu Yawen, Lin Jian, Tao Gaojian. Applied anatomy of puncture through inferior orbital fissure and foramen rotundum apporach. Chinese Journal of Anatomy and Clinics, 2014, 19(1): 37-40.
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