High resolution CT study on post-traumatic visual loss / 眼科

ABSTRACT

Objective To analyze the high resolution CT(HRCT)appearance and its clinical significance in patients with post-traumatic visual loss.Design Retrospective study.Participants 150 patients with post-traumatic visual loss.Methods The optic canal HRCT of 150 patients admitted from March to June of 2007 by Department of Emergency for post-traumatic visual loss were ana- lyzed retrospectively.Main Outcome Measures Pedilection sites and their incidence rates of optic canal and orbital apex region. Results Optic canal fractures were found in 78 patients,manifesting as rupture and displacement of optic canal wall,accompanied with or without adjacent structure fractures.(1)Among 88 sides of fractures,22 sides presented with single fracture,and 66 sides with multi- ple fractures,revolving several optic canal walls.(2)156 sites of fractures were displayed in 78 patients,and the most frequent types were displacement fractures(47.4%).(3)Accompanied adjacent structure fractures were found in 73 cases of the 78 patients,while 40 cases were found in 72 patients without optic canal fracture.Totally,283 sites of adjacent structure fractures were discovered with the most frequent sites of orbital apex region,accounting for 44.5%.Conclusion HRCT could well display optic canal fractures and accom- panied fractures of adjacent structures,providing important informations for diagnosis and intervention of traumatic visual loss.(Oph- thalmol CHN,2007,16326-329)