Accuracy of Prader orchidometer in measuring testicular volume

Abstract

The result of this study has shown that measuring the testicular volume by Prader orchidometer overestimates the actual testicular volume.

Natural history of testicular size in boys with varicoceles

“…Moreover, they constrain the observer to specific size choices ranging from 1 cc to 25 cc, and the effect of pairing a testicle with a particular size (such as picking 10 cc vs 8 cc) can lead to an error of up to 20%. To this end, Mabieri et al, when comparing orchidometer values with volumes of dissected testicles, showed that an orchidometer consistently overestimates testicular volume by 25%, but there still remains significant correlation between the two measurements [12]. In theory, any error in the orchidometric measurements should distribute itself across both testicles and only influence the absolute volume, not the volume difference.…”

Determining the Normal Size and Values of the Testicles in Adult Population in the Western Region, Saudi Arabia.

“…[2,13] Since the US was used in measuring the testicular volume, several equations were used to calculate the volume, one of the most common equation was formulated by Lambert 1951 (0.71 * length * width * height). [2,6,14] Regarding the fact the cut-off point didn't determine ,previous studies showed various results in measuring testicular volume relying on the using method. [2,15] The results of the current studies showed that the mean scores of testicles volume were 12.0±5.0 for right testicular and 11.2±4.7 for left testicular, which consistent with other studies, in India studies the mean scores for right and left testicles were 11.83±3.2 and 11.08±2.8 respectively, [11] and in Albania study the mean scores were 12.8 and 12.4 for right and left testicles respectively .…”

Diagnostic utility of testosterone priming prior to dynamic tests to differentiate constitutional delay in puberty from isolated hypogonadotropic hypogonadism

“…MRI brain focussing on the pituitary–hypothalamic region and olfactory placodes was performed at baseline for patients in groups A and B using a 3T scanner and was reported by a dedicated radiologist. Testicular volume was assessed by Praders' orchidometer and by ultrasound …”