Sawires H, et al. - Researchers aimed at investigating the significance of some sonographic and Doppler parameters as non-invasive markers of glomerular filtration rate (GFR) and renal histopathological damage in children with CKD. They suggested an increase in the resistivity index (RI), pulsatility index (PI) values as indicators for possible advancing renal damage. In addition, RI and PI seemed to have the potential for fairly predicting the degree of glomerular sclerosis and interstitial fibrosis.