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. 2009 May;25(3):169-72.

[Measurement of the globe proptosis by CT and its accuracy in patients with unilateral orbital fracture]

[Article in Chinese]
Zhi-Yong Zhang  1 , Yi Zhang, Yang He, Jin-Gang An
Affiliations
  • PMID: 19803193

[Measurement of the globe proptosis by CT and its accuracy in patients with unilateral orbital fracture]

[Article in Chinese]
Zhi-Yong Zhang et al. Zhonghua Zheng Xing Wai Ke Za Zhi. 2009 May.

Abstract

Objective: To evaluate the accuracy of measurement of the globe proptosis by CT in patients with unilateral orbital fracture.

Methods: 25 patients with unilateral orbital fracture were included. CT was performed before and after operation. The globe proptosis on the unaffected side was measured before and after operation by using Hertel exophthalmometer (HE), CT images with orbital lateral rim (OLR) and the optic nerve foramen (ONF) as reference points. The accuracy was evaluated comparably by statistical analyses.

Results: The preoperative and postoperative average globe proptosis were (13.9 +/- 3.1) mm and (12.5 +/- 2.2) mm in HE group, (16.1 +/- 2.6) mm and (15.7 +/- 2.3) mm in the OLR group, (45.3 +/- 4.8) mm and (46 +/- 3.9) mm in the ONF group, showing a significant difference between the pre-and post-operative results in HE group, but not in OLR and ONF groups.

Conclusions: CT measurement with the orbital lateral rim as reference point is more reliable than Hertel exophthalmometer measurement for globe proptosis.

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