Conclusions
 
 
1. In ARF, RI and PI of interlobar  artery are           
    significantly higher in Tubulo interstitial (TI) than   glomerular disease (GN).
2. In ARF due to GN the RI and PI are normal however severe is the renal failure
3. There is positive correlation between RI/PI    
    and severity of renal failure in ARF due 
    to Tubulo interstitial (TI) diseases. 
4. USG colour doppler study is a useful tool 
    in evaluation and management of ARF