Ekesten B
Department of Medicine and Surgery, Faculty of Veterinary Medicine, Swedish University of Agricultural Sciences, Uppsala.
Acta Vet Scand. 1994;35(4):427-33. doi: 10.1186/BF03548318.
A-scan ultrasonography was performed in 40 healthy Samoyeds aged 2-5 years. Mydriasis and cycloplegia were induced in all dogs and 25 of the dogs were also sedated prior to the ultrasound examination. Five consecutive A-scans were taken on each eye and the intrasubject variance (measurement error) and true intersubject variance (true biological variation) were computed. The true biological variation was found to be of the same magnitude in both sedated and unsedated dogs, whereas the measurement errors were considerably larger in the group of unsedated dogs compared to the sedated ones. Magnitudes of the measurement errors for the anterior chamber depth and length of the vitreous body in the unsedated group were unacceptable. The sizes of the measurement errors in the sedated dogs were all within an acceptable range.
对40只年龄在2至5岁的健康萨摩耶犬进行了A超检查。所有犬均进行了散瞳和睫状肌麻痹，其中25只犬在超声检查前还进行了镇静。每只眼睛连续进行5次A超扫描，并计算了个体内方差（测量误差）和个体间真实方差（真实生物学变异）。结果发现，镇静犬和未镇静犬的真实生物学变异幅度相同，而未镇静犬组的测量误差比镇静犬组大得多。未镇静组前房深度和玻璃体长度的测量误差幅度不可接受。镇静犬的测量误差大小均在可接受范围内。
