目的 對比A型超聲角膜測厚儀、OrbscanⅡ眼前節分析儀和Pentacam眼前節分析儀測量準分子激光原位角膜磨鑲術(LASIK)前后中央角膜厚度的差異。 方法 2010年10月-2011年3月,分別使用A型超聲角膜測厚儀、OrbscanⅡ和Pentacam眼前節分析儀測量137例(274只眼)近視患者LASIK前后中央角膜厚度,并對測量結果進行配對t檢驗和Pearson相關性分析。 結果 LASIK術前A型超聲、OrbscanⅡ和Pentacam測量值分別為(526.6 ± 34.1)、(516.6 ± 34.2)、(539.8 ± 31.5) μm,Pentacam測量值較A型超聲和OrbscanⅡ測量值高,差異有統計學意義(P<0.05),而A型超聲和OrbscanⅡ測量值之間差異無統計學意義(P>0.05);LASIK術后6個月A型超聲、OrbscanⅡ和Pentacam測量值分別為(448.2 ± 48.5)、(391.9 ± 58.5)、(451.5 ± 46.4) μm,LASIK術后A型超聲和Pentacam測量值無差異(P>0.05),而OrbscanⅡ測量值較A型超聲和Pentacam低;Pearson相關分析顯示,LASIK術后Pentacam和A型超聲CCT測量值呈高度相關(P<0.05)。 結論 3種儀器的中央角膜厚度測量值不可互換,LASIK術后A型超聲和Pentacam量值較為準確。
Objective To compare the difference in measurements of central corneal thickness (CCT) using A-scan, OrbscanⅡand Pentacam before and after laser in situ keratomileusis (LASIK). Methods Between October 2010 and March 2011, the CCT of 137 patients (274 eyes) were measured by A-scan, OrbscanⅡ and Pentacam, and the results were analyzed by paired t-tests and Pearson correlation. Results Before LASIK, the values of CCT measured by A-scan, OrbscanⅡ and Pentacam were (526.6 ± 34.1), (516.6 ± 34.2), and (539.8 ± 31.5) μm respectively; paired t-tests showed the CCT values obtained with Pentacam were significantly higher than those with other methods (P<0.05), but there were no statistical significant differences between OrbscanⅡand Pentacam measurements (P>0.05). Six months after LASIK, the values of CCT measured by A-scan, OrbscanⅡand Pentacam was (448.2 ± 48.5), (391.9 ± 58.5), and (451.5 ± 46.4) μm respectively; the CCT values obtained with A-scan and Pentacam didn’t differ much from each other (P>0.05), and the CCT values obtained with OrbscanⅡwere lower than those obtained with A-scan and Pentacam. There was a high correlation between A-scan and Pentacam measurements. Conclusion The these methods measuring CCT could not be used interchangeably, and A-scan and Pentacam after LASIK were more precise than OrbscanⅡ.
引用本文: 劉磊,栗靜,王虎杰,徐曼,柯紅琴. 三種儀器測量準分子激光原位角膜磨鑲術前后中央角膜厚度的對比研究. 華西醫學, 2012, 27(1): 73-75. doi: CNKI: 51-1356/R.20120115.1546.016 復制