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目的探讨外伤后视力下降患者的高分辨CT表现及临床意义。设计回顾性研究。研究对象150例外伤后视力下降患者。方法对2007年3月至6月因外伤后视力下降行视神经管高分辨CT(HRCT)检查的150例患者进行回顾性分析。主要指标视神经管及眶尖区骨折及其发生率。结果150例中78例(88侧)视神经管骨折。(1)88侧骨折中,22侧为单发,66侧为多发混合型,均为一个或多个视神经管壁骨折并累及颅口或眶口;(2)78例中发现骨折部位156处,其中凹陷移位型最多见,占47.4%;(3)78例中,73例伴发视神经管邻近结构骨折;而无明确视神经管骨折的72例中,40例伴发邻近结构骨折。113例伴发邻近结构骨折病例中,发现伴发骨折共283处,以眶尖区最多见,占44.5%。结论HRCT能显示视神经管各壁及邻近结构骨折情况,为临床诊断和治疗提供依据。(眼科,2007,16:326-329)
Objective To investigate the high resolution CT findings and its clinical significance in patients with visual impairment after trauma. Design retrospective study. 150 patients with visual acuity after trauma patients. Methods A retrospective analysis was performed on 150 patients with visual acuity high resolution CT (HRCT) examination after traumatic visual acuity from March 2007 to June 2007. The main indicators of optic canal and the orbital apex fracture and its incidence. Results In 150 cases, 78 cases (88 sides) of optic canal fracture. (1) In 88 side fractures, 22 sides were solitary and 66 sides were multiple mixed type, all of them were one or more optic nerve wall fractures involving cranial orbital orifices; (2) 78 cases were found in fracture site 156 (47.4%). (3) Of the 78 cases, 73 cases were accompanied with adjacent structural fracture of optic canal. Among the 72 cases without definite optic canal fracture, 40 cases had adjacent structural fracture. Of 113 cases with adjacent structural fractures, a total of 283 fractures were found, with the most common in the orbital apex, accounting for 44.5%. Conclusion HRCT can show the fracture of the optic canal wall and adjacent structures and provide the basis for clinical diagnosis and treatment. (Ophthalmology, 2007,16: 326-329)