Comparison of color Doppler ultrasonography and nuclide nephro-dynamic imaging on functional evaluation of the kidney with no image on intravenous urography

Objective To compare the significance of color Doppler ultrasonography(CDFI)and nuclide nephro-dynamic imaging(SPECT)on functional evaluation of the kidney with no image on intravenous urography(IVU).Methods A total of 51 patients with severely chronic obstructive hydronephrosis who had no image on IVU were enrolled in this study.The Doppler resistive index(RI)of renal blood flow and the glomerular filtration rate(GFR)of sick kidneys were detected by CDFI and nuclide renal dynamic imaging respectively to evaluate the function.All the results were compared with the findings of 24 h drainage volume after percutaneous puncture.Results Among the 51 kidneys,20 were diagnosed by CDFI and mean RI was 0.71±0.05,but 14 were diagnosed by nuclide renal dynamic imaging and mean GFR was 48.5±6.4 ml/min.While after percutaneous renal puncture,21 were diagnosed by CDFI and mean RI was 0.68±0.02,22 were diagnosed by nuclide renal dynamic imaging and mean GFR was 56.1±5.3 ml/min.The 24 h drainage volume after renal puncture showed that 22 were functional and the rest 29 were non-func-tional.From the results of chi square(χ2)test,the correct rate of diagnosis about renal function of CDFI(96.07%)was higher than that of nuclide renal dynamic imaging(84.31%,P0.05)before the renal obstruction was released.However,the correct rate of nuclide renal dynamic imaging(100.00%)was higher than that of CDFI(98.04%)after velease,but the difference between was no statistically significant(P0.05).Conclusions To evaluate the function of kidneys suffering from hydronephrosis with no image on IVU,the correct rate of CDFI was significantly higher than that of nuclide renal dynamic imaging before the hydronephrosis was released by percutaneous renal puncture but without significance for evaluating the renal function.