眼球突出度测量方法的比较及其法医学意义

摘要

目的 比较Hertel突眼度计及CT测量两种眼球突出度测量方法的差异,探讨其法医学应用价值.方法 选取56例眼部无损伤及疾病的正常人作为正常组,在确定规范的CT影像工作站上测量眼球突出度绝对值,并比较双眼眼球突出度有无差异.选取47例单侧眼眶骨折的伤者,根据两眼有无眼眶骨折,将其分为伤眼组及健眼组,分析Hertel突眼度计及CT测量两种方法测得同一眼眼球突出度绝对值的差异以及同一受检者双眼眼球突出度相对差值的差异.结果 CT法测量正常人双眼间眼球突出度差异无统计学意义.健眼组CT法测得眼球突出度绝对值为(16.66±5.41) mm,Hertel突眼度计测得眼球突出度绝对值为(16.16±4.45) mm,两组测量结果之间差异无统计学意义(P＞0.05).伤眼组应用两种方法测量的眼球突出度绝对值之间差异具有统计学意义(P＜0.05).两种测量方法测得的眼球突出度相对差值在伤眼和健眼组之间差异无统计学意义(P＞0.05). 结论 CT法与突眼度计法具有较好的一致性,可以运用于法医学鉴定实践.%Objective To compare the differences between Hertel exophthalmometry and CT on exophthalmos measurement,and explore its practical application value in forensic medicine.Methods Fifty-six normal individuals without eye injuries or diseases were selected as the control group.The absolute values of exophthalmos were measured in the standardized CT image workstation.The difference of binocular exophthalmos was compared in normal group.Forty-seven cases with unilateral orbital fracture were divided into injured eye group and normal eye group according to the presence of binocular orbital fractures.The differences of the absolute values of eophthalmos from the same eye and the relative values of eophthalmos between two eyes for same person measured by Hertel exophthalmometry and CT were analyzed.Results There was no statistical difference of exophthalmos between the normal eyes measured by CT method.In the normal eye group,the absolute value of exophthalmos measured by CT method was (16.66±5.41) rm,which was (16.16±4.45)mm when measured by the Hertel exophthalmometry method.There was no statistical difference between two groups (P＞0.05).In the injured eye group,there was statistical difference between the absolute values of exophthalmos measured by two measurement methods (P＜0.05).There was no statistical difference of the relative values of exophthalmos between the injured eyes and the normal eyes by two measurement methods (P＞0.05).Conclusion CT method has a good consistency with Hertel exophthalmometry,which can be applied into the practice of medicolegal expertise.