Renal Doppler Resistance Indices in Kidney Transplant Recipients With Proteinuria

WOS: 000441211400025PubMed: 29880357Background. The onset of proteinuria in renal transplant recipients may be associated with an increased risk of allograft failure. Little is known about the relationships between factors influencing proteinuria and the Doppler ultrasound (DU) intrarenal resistive index (RI) and pulsatility index (PI) among donor recipients with proteinuria <1000 mg/24 h. Methods. We assessed correlations between the DU RI and PI and protein content in 93 selected renal transplant recipients: 62 patients with proteinuria 100 to 299 mg/24 h, 16 patients with proteinuria 300 to 499 mg/24 h, and 15 patients with proteinuria 500 to 999 mg/24 h. All patients underwent transplantation in a single center and were monitored by DU for at least 28 months post-transplantation. Results. The DU RI values of the proteinuria 100 to 299 mg/24 h, 300 to 499 mg/24 h, and 500 to 999 mg/24 h groups were 0.67 +/- 0.05; 0.65 +/- 0.04, and 0.64 +/- 0.07, respectively, and the P1 values were 1.21 +/- 0.20, 1.10 + 0.14, and 1.15 +/- 0.22, respectively. Multivariate logistic regression analysis revealed a correlation between group 100 to 299 mg/24 h and RI values, serum creatinine, living donor (R-2 = 19.6%, P = .05); group 300 to 499 mg/24 h and the RI, PI values, cadaver donor (R-2 = 17.5%, P = .001); and group 500 to 999 mg/24 h and the RI, PI values, serum creatinine, graft survival (R-2 = 15.4%, P = .005). Conclusions. Among donor recipients with proteinuria <1000 mg/24 h, DU RI values were <0.72 and PI values were