ABSTRACT
Objective To analyze the relationship between the optic nerve sheath diameter (ONSD) and the scoring of Glasgow Coma Scale(GCS)or CT score(Rotterdam CT score or Helsinki CT score).Methods Sixty-three adult patients with traumatic brain injury in our emergency room were enrolled.All the patients were presented with the data of GCS and the classification of cranial CT,as well as ONSD measured by ultrasound.The correlation between ONSD and classification of cranial CT scores or GCS was analyzed by Spearman correlation analysis.Patients were divided into mild group,moderate group and severe group based on GCS or CT scores.One-way Analysis of Variance (ANOVA) was used to discover the difference in mean ONSD among different groups on account of scoring of GCS or cranial CT scores.The intergroup comparisons were analyzed by the least-significant-difference (LSD) tests.Results ONSD measurements were strongly correlated with GCS(r=-0.540,P＜0.01)or classification of Rotterdam CT scores (r=0.654,P＜0.01) and Helsinki CT scores (r=0.663,P＜0.01).The mean ONSD of the mild,moderate and severe group were (3.89±0.70)mm,(4.50±0.65)mm and (4.81±0.72) mm,respectively.The mean ONSD of the mild group was significantly shorter than that of severe group (P＜0.01) and moderate group(P＜0.05).The same results were found when comparing mean ONSDs among different groups classified by Rotterdam CT scores (low group (3.74±0.64)mm vs.middle group (4.3 l±0.73)mm vs.high group (5.09±0.57)mm,P＜0.01 or P＜0.05) or classified by Helsinki CT scores (low group (3.54±0.61)mm vs.middle group (4.46±0.73)mm vs.high group (5.16±0.37)mm,P＜0.01.Conclusions Ultrasonography used to measure ONSD is significantly correlated with both GCS and classification of head CT including Rotterdam CT score and Helsinki CT score.The results indicate that ultrasonography measurement of ONSD is helpful for early bedside assessment in patients with traumatic brain injury.
ABSTRACT
Due to the special anatomic structure of optic nerve,the optic nerve sheath diameter( ONSD) increases along with the elevated intracranial pressure(ICP). The normal value or cut?off point of ONSD has not been unified in adults and children. The change of ONSD in children is different from that of adults as the children are at the stage of growth. With the deep understanding of ONSD,ultrasonic measurement of ONSD has a wide range of applications in adults and children.