Abstract:Objective: To evaluate the relationship between renal function and renal blood perfusion, and to evaluate its clinical significance. Methods: The renal blood perfusion of one thousand and one hundred patients were assessed by CDE after kidney transplantation. CDE was graded into 4 grades according to the perfusion, and the samples of urine and blood were also tested on the same day. Results: The indexes of renal function were significantly correlated with the grade of CDE, rejections after transplantation were also significantly correlated with the grade of CDE and correlated with the change of renal function. Conclusion: CDE provides more abundant signals of renal blood perfusion, and it is more sensitive than CDFI. The perfusion of renal was positively correlated with the renal function, and CDE can also reflect the rejection early.