Effects of unilateral testicular torsion on the blood flow of contralateral testis - An experimental study on dogs

The effects of unilateral testicular torsion on the blood flow of the contr alateral testis were investigated. Fourteen adult male dogs were recruited. Seven dogs underwent unilateral testicular torsion of 4 h duration, and th e other seven dogs had a control operation. Testicular blood flow was deter mined by colour Doppler ultrasonography before and after the testicular tor sion. Bilateral orchidectomy was performed at the end of the study and hist opathological changes were evaluated. Values of peak systolic velocity, end diastolic velocity, and resistive index were not statistically significant between ipsilateral and contralateral testes in the study group (p > 0.05) . On comparison with the control group, blood flow in the contralateral tes tes showed no statistically significant difference (p > 0.05). Oedema and c ongestion were seen on ipsilateral testes in the study group. No histopatho logical changes were noted on the contralateral testes. Minimal oedema and congestion secondary to manipulation were found in the control operation te stes. We conclude that unilateral testicular torsion does not decrease cont ralateral testicular blood flow as shown by colour Doppler ultrasonography.