Abstract
To compare the surgical outcomes of endoscope-navigation (EN)-assisted orbital decompression and non-EN-assisted orbital decompression for Graves' orbitopathy (GO) and to assess the potential clinical advantage of EN in orbital decompression surgery. This retrospective cohort study was performed on 227 orbits of 147 GO patients who underwent EN-assisted orbital decompression (185 orbits) or non-EN-assisted orbital decompression (42 orbits). Assessment included proptosis reduction, best-corrected visual acuity (BCVA), diplopia, ocular restriction and surgical complications. The proptosis reduction in the EN group was 0.9 mm greater than that in the non-EN group in the entire cohort (p = 0.004) and 1.0 mm greater than that in the non-EN group in the propensity score matching cohort (p = 0.025) at 2 years postoperatively. In all, 78.2% of orbits with sight-threatening GO in the EN group and 52.6% of orbits in the non-EN group showed BCVA improvement (p = 0.026). The proportion of patients with improvement in diplopia was significantly greater in the EN group than in the non-EN group (p = 0.026). EN offers anatomical localization and deep-seated tissue visualization in orbital decompression and significantly improves the surgical outcomes for GO.
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