Lenstar与A超测量前房深度及晶状体厚度的比较

Comparision of Lenstar and A-scan ultrasound biometry in the measurement of anterior chamber depth and lens thickness

目的比较Lenstar LS900光学生物测量仪与A超测量(ACD)、晶状体厚度(LT)的差异,以评价Len-star测量参数的准确性,为其临床应用提供依据。方法对31例(35只眼)白内障患者分别应用Lenstar与A超测量ACD、LT,测量数据之间的差异采用配对t检验,一致性采用Bland-Altamn统计分析。结果 Lenstar测量ACD为(3.047±0.384)mm,A超为(2.853±0.397)mm,差异有统计学意义(t=2.242,P<0.05),一致性较差。测量LTLenstar为(4.546±0.370)mm,A超为(4.631±0.411)mm,差异无统计学意义(t=0.912,P﹥0.05),一致性较差。结论 Lenstar与A超的测量结果存在一定差异,在临床中应注意仪器之间的差异。

Objective Compare the differences between Lenstar and A-scan ultrasound biometry for measuring the anterior chamber depth and lens thickness in order to evaluate the accuracy of those two instruments. Methods Totally 35 eyes of 31 cataract patients were measured with both Lenstar and A-scan ultrasound biometry separately. Date were analyzed using a paired samples t test and Blant-Altman plots. Results The measurements of anterior chamber depth with Lenstar was （ 3. 047 ± 0. 384） mm. A-scan ultrasound biometry was （ 2. 853 ± 0. 397 ） ram, the difference was statistically significant （ t = 2.242, P 〈 0.05 ）. The measurements of lens thickness with Lenstar was （ 4. 546 ± 0. 370 ） nun, A-scan ultra- sound biometry was （ 4.631 ± 0.411 ） mm, the difference was not statistically significant （ t = 0. 912, P 〉 0. 05 ）. The Bland-Ahanm showed that the two decices had nan-comparable results for anterior chamher depth and lens thickness. Condusion Attention should be paid to the differences between Lenstar and A-scan ultrasound biometry in clinical practice. The two device may not be directly substituted for each other.