두 샤임플러그 전안부사진기를 이용한 전안부 계측치의 비교
Comparison of Anterior Segment Measurements between Dual and Single Scheimpflug Camera
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목적: Galilei G6와 Pentacam HR로 측정한 각막굴절력과 전방깊이, 중심각막두께의 측정치를 비교하고, 기기 간 일치도를 분석하고자 하였다. 대상과 방법: 백내장 수술을 목적으로 방문한 환자 40명(40안)을 대상으로 두 기기를 이용하여 측정한 전면과 후면의 각막굴절력, 전방깊이, 그리고 중심각막두께를 비교하였다. 결과: Galilei G6 (4 mm), Pentacam HR (3 mm), Pentacam HR (4 mm)로 측정한 전면 각막굴절력은 각각 44.35 ± 1.38D, 44.09 ± 1.32D, 44.12 ± 1.35D였고, 후면 각막굴절력은 각각 6.39 ± 0.23D, 6.45 ± 0.23D, 6.45 ± 0.22D였다. Galilei G6 (4 mm)와 Pentacam HR (3 mm), Galilei G6 (4 mm)와 Pentacam HR (4 mm) 사이에서 전면과 후면 각막굴절력 모두 유의한 차이를 보였다. Galilei G6와 Pentacam HR로 측정한 전방깊이는 각각 3.26 ± 0.42 mm, 3.17 ± 0.42 mm, 중심각막두께는 각각 556.65 ± 30.12 μm, 553.78 ± 29.42 μm였고, 측정치 간에 유의한 차이를 보였으며, 측정값의 95% 일치도 한계는 각각 -0.14~0.32 mm, -12.54~18.29 μm였다. 결론: Galilei G6와 Pentacam HR로 측정한 전면과 후면의 각막굴절력, 전방깊이, 그리고 중심각막두께는 측정치에서 유의한 차이를보이고 일치도가 낮아 임상에서 대치하여 사용할 수 없을 것으로 생각한다.
Abstract
Purpose: To assess the degree of agreement of two rotating Scheimpflug cameras, Galilei G6 and Pentacam HR, in measuring corneal refractive power (K), anterior chamber depth (ACD), and central corneal thickness (CCT). Methods: Measurement agreement was assessed in 40 eyes of 40 outpatients at our hospital. Measurements of anterior and posterior corneal refractive power (K), ACD, and CCT were compared between the Galilei G6 and Pentacam HR. Results: For Galilei G6 (4 mm), Pentacam HR (3 mm) and Pentacam HR (4 mm), the anterior corneal refractive powers (K) were 44.35 ± 1.38 D, 44.09 ± 1.32 D, and 44.12 ± 1.35 D, respectively, and the posterior corneal refractive powers (K) were 6.39 ± 0.23 D, 6.45 ± 0.23 D, 6.45 ±0.22 D. The differences in the results were statistically significant. The average ACD measurements using Galilei G6 and Pentacam HR were 3.26 ± 0.42 mm and 3.17 ± 0.42 mm, respectively, and the average CCT measurements were 556.65 ± 30.12 μm and 553.78 ± 29.42 μm. The differences in the measurements were statistically significant. In addition, ACD 95% limits of agreement (LoA) between Galilei G6 and Pentacam HR were in the range of -0.14~0.32 mm, and CCT 95% LoA were in the range of -12.54~18.29 μm. Conclusions: There were significant differences in measurements of anterior and posterior corneal refractive power (K), ACD, and CCT between the two cameras. Agreement analysis suggests that Galilei G6 and Pentacam HR should not be used interchangeably.
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