Department of Paediatrics, Medical Centre Alkmaar, The Netherlands.
Horm Res Paediatr. 2011;76(1):56-64. doi: 10.1159/000326057. Epub 2011 Apr 5.
BACKGROUND/AIMS: We obtained reference data for testicular volume measured by ultrasound in asymptomatic boys aged 0.5-18 years. In addition, we assessed the validity of the Prader orchidometer per age group by correlating it with the volume measurement by ultrasound.
The study only included healthy boys with two scrotal testes at birth and at the time of the examination. For each boy the testicular volume of both testes was measured by ultrasound and the Prader orchidometer. Testicular volumes were measured for boys aged from 1 to 18 years. The boys' ages were rounded down to the last birthday if it had occurred less than 6 months previously or rounded up to the next birthday if it was going to be within 6 months.
The volume measurement by the Prader orchidometer according to reference curves showed a statistically significant correlation. Moreover, the testicular volumes measured by the Prader orchidometer showed an accurate goodness of fit with US measurements (R(2) = 0.956).
Normative values are provided for testicular volume measured by ultrasound in boys aged 0.5-18 years. An accurate correlation was found between volume measurements by ultrasound and by the Prader orchidometer (R(2) = 0.956). Therefore, volume measurement by the Prader orchidometer, as generally used in the practice by doctors, can be used as a valid parameter for monitoring testicular growth.
背景/目的：我们获得了 0.5-18 岁无症状男孩睾丸体积的超声测量参考数据。此外，我们通过将其与超声体积测量相关联，评估了按年龄分组的 Prader 睾丸计的有效性。
该研究仅包括在出生时和检查时具有两个阴囊睾丸的健康男孩。对于每个男孩，均通过超声和 Prader 睾丸计测量两个睾丸的睾丸体积。对 1 至 18 岁的男孩进行了睾丸体积测量。如果男孩的上次生日不到 6 个月前，则将其年龄向下舍入到最近的生日；如果生日在 6 个月内，则将其年龄向上舍入到下一个生日。
根据参考曲线，Prader 睾丸计的体积测量显示出统计学上的显著相关性。此外，Prader 睾丸计测量的睾丸体积与 US 测量值具有准确的拟合优度（R(2) = 0.956）。
为 0.5-18 岁男孩的超声测量睾丸体积提供了正常值。超声和 Prader 睾丸计的体积测量之间发现了准确的相关性（R(2) = 0.956）。因此，医生通常在实践中使用的 Prader 睾丸计的体积测量可以作为监测睾丸生长的有效参数。
