Color Doppler Study of Intrarenal Blood Flow at Different Stage in Patients with Chronic Renal Failure

Objective To provide a new parameter to evaluate clinical renal failure by the color Doppler study of intrarenal blood flow in the patients with chronic renal failure. Methods The patients were divided into group I (azotemia stage) and group Ⅱ (uremia stage).All the patients were examed with color Doppler. Peak systolic velocity (PS) and resistance index (RI) of the interlobar and arcuate arteries were measured. The blood creatinine was recorded. Results ①The RI of interlobar and arcuate arteries in groups Ⅱ was higher than in group Ⅰ, but the PS in group Ⅱ was lower than group Ⅰ. ②The PS of interlobar and arcuate arteries in two groups were negatively correlative with the blood creatinine, whereas the RI were positively correlative with the blood creatinine. ③The level of blood creatinine in the patients with higher RI declined slowly, even persisted at a high level. Conclusion Measuring the flow indexes of interlobar and arcuate arteries with color Doppler can provides a new valuable method to judge the damage degree of the chronic renal failure and predict the recovery speed of the renal function.