COMPARISON OF THE RESISTIVE INDEX TO CLINICAL-PARAMETERS IN DOGS WITHRENAL-DISEASE

The resistive index (RI) is a measurement of arteriole vascular resist ance and is obtained by pulsed-wave Doppler interrogation, The diagnos tic potential of the renal resistive index (RI) was retrospectively in vestigated in 142 kidneys from 81 dogs, The resistive index of each ki dney was compared to clinical laboratory parameters, clinical diagnose s, and sonographic findings. The mean renal resistive index (RI) for 2 2 normal kidneys was 0.61 (standard deviation = 0.06), An elevation in the mean renal RI (>0.70) was found for the clinical diagnoses of acu te renal failure and congenital dysplasia, When a RI of greater than 0 .70 was considered abnormal, the sensitivity and specificity of the RI in determining normal vs, abnormal kidneys were 38% and 96% respectiv ely.