Accuracy of axial length measurements from immersion B-scan ultrasonography in highly myopic eyes
Accuracy of axial length measurements from immersion B-scan ultrasonography in highly myopic eyes作者机构：Department of Ophthalmology Chinese PLA General Hospital
出 版 物：《International Journal of Ophthalmology(English edition)》 (国际眼科杂志（英文版）)
年 卷 期：2014年第7卷第3期
页 面：441-445页
核心收录：
学科分类：1002[医学-临床医学] 1010[医学-医学技术（可授医学、理学学位）] 10[医学]
基 金：Supported by National Key Basic Research Program of China(973 Program,No.2013CB967000) National Natural Science Foundation of China(No.81271052)
主 题：axial length measurement immersion ultrasonography high myopia
摘 要：AIM:To evaluate the accuracy of axial length(AL)measurements obtained from immersion B-scan ultrasonography(immersion B-scan)for intraocular lens(IOL)power calculation in patients with high myopia and ***:Immersion B-scan,contact A-scan ultrasonography(contact A-scan),and the IOLMaster were used to preoperatively measure the AL in 102 eyes from 102 patients who underwent phacoemulsification and IOL *** were divided into two groups according to the AL:one containing patients with22 mm≤AL26 mm(group A)and the other containing patients with AL≥26 mm(group B).The mean error(ME)was calculated from the difference between the AL measurement methods predicted refractive error and the actual postoperative refractive ***:Ingroup A,ALs measured byimmersion Bscan(23.48±1.15)didn’t differ significantly from those measured by the IOLMaster(23.52±1.17)or from those by contact A-scan(23.38±1.20).In the same group,the standard deviation(SD)of the mean error(ME)of immersion B-scan(-0.090±0.397 D)didn’t differ significantly from those of IOLMaster(-0.095±0.411 D)and contact A-scan(-0.099±0.425 D).In group B,ALs measured by immersion B-scan(27.97±2.21 mm)didn’t differ significantly from those of the IOLMaster(27.86±2.18 mm),but longer than those measured by Contact A-scan(27.75±2.23 mm,P=0.009).In the same group,the standard deviation(SD)of the mean error(ME)of immersion B-scan(-0.635±0.157 D)didn’t differ significantly from those of the IOLMaster(-0.679±0.359 D),but differed significantly from those of contact A-scan(-0.953±1.713 D,P=0.028).CONCLUSION:ImmersionB-scanexhibitsmeasurement accuracy comparable to that of the IOLMaster,and is thus a good alternative in measuring AL in eyes with high myopia when the IOLMaster can’t be used,and it is more accurate than the contact A-scan.
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