Association between preoperative inferior rectus muscle swelling and outcomes in orbital blowout fracture

作者：Matsunaga Kazuhide^*; Asamura Shinichi; Morotomi Tadaaki; Wada Mitsuhiro; Wada Yoshitaka; Nakamura Norifumi; Isogai Noritaka

来源：Journal of Cranio-Maxillofacial Surgery, 2011, 39(7): 509-514.

DOI：10.1016/j.jcms.2010.10.024

• Orbital blowout fracture
• Double vision
• Impaired eye movements
• Postoperative outcome
• Inferior rectus muscle swelling

Purpose: In 18 patients with orbital blowout fracture who underwent reconstruction using a bone autograft, the association between preoperative inferior rectus muscle swelling and the outcome 1 year after the operation was evaluated.
Material and methods: The patients were classified according to outcomes into four groups: Group A without double vision showing normal ocular movements, Group B with double vision showing normal ocular movements, Group C with double vision showing improvement in ocular movements, and Group D with double vision showing no improvement in ocular movements. Inferior rectus muscle swelling was evaluated by calculating its swelling rate on the injured compared with the non-injured side on preoperative coronal CT images.
Results: Concerning outcomes, 12, 2, and 4 patients were classified as Groups A, B, and C, respectively, and no patient was classified as Group D. The inferior rectus muscle swelling rate was <= 1.2 in Group A, and 1.6-2.4 in Groups B and C.
Conclusion: In patients in whom inferior rectus muscle swelling on the injured is >= 1.6 times that on the non-injured side on preoperative coronal CT images, double vision and slight impairment of eye movements may remain after surgery.

• 出版日期2011-10