Testicular Volume Measurement: Comparison of Ultrasonography, Orchidometry, and Water Displacement - 15/08/11
Abstract |
Objectives |
To determine the accuracy of orchidometry and ultrasonography for measuring the testicular volume by comparing the resultant measurements with the actual testicular volume in humans.
Methods |
The testicular volume of 40 testes from 20 patients with prostate cancer (mean age ± SD 74.5 ± 7.5 years) was measured using the Prader orchidometer and ultrasonography before therapeutic bilateral orchiectomy. The ultrasound measurements of testicular volume were calculated using three formulas: length (L) × width (W) × height (H) × 0.52, L × W2 × 0.52, and L × W × H × 0.71. The actual testicular volumes were determined by water displacement of the surgical specimen.
Results |
The mean actual testicular volume of the 40 testes was 9.3 cm3 (range 2.5 to 23.0). A strong correlation was found between the testicular volume calculated by the three ultrasound formulas and the actual volume (r = 0.910 to 0.965, P <0.0001) and was stronger than the correlation with the Prader orchidometer (r = 0.818, P <0.0001). The smallest mean difference from the actual testicular volume was observed with the formula L × W × H × 0.71, which overestimated the actual volume by 0.80 cm3 (7.42%). The measurements using the Prader orchidometer correlated with the actual testicular volume and with the testicular volume calculated using the three ultrasound formulas (r = 0.801 to 0.816, P <0.0001). However, the orchidometer measurements had the largest mean difference from the actual testicular volume (6.68 cm3, 81.7%).
Conclusions |
The results of this study have shown that measuring the testicular volume by ultrasonography is more accurate than by the Prader orchidometer, and the formula L × W × H × 0.71 was the most accurate for calculating the testicular volume.
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Vol 69 - N° 1
P. 152-157 - janvier 2007 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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