Early diagnosis of RAS is an important clinical objective since interventional therapy may improve or cure hypertension and preserve renal function. The present study was conducted to determine diagnostic efficiency of vascular color Doppler ultrasound for renal artery stenoses.
Materials & Methods: The present study was conducted on 43 suspected of having renovascular arterial hypertension patients of both genders. All patients were subjected to vascular color doppler ultrasound according to the direct technique with the patients in the supine position with low-frequency curve transducers (2 to 3.5 MHz) to allow greater penetration (10-12 cm) of the ultrasound beam.
Results: Out of 43 patients, males were 22 and females were 21. Color Doppler of renal arteries, 14 were normal, 12 showed moderate stenosis, 8 had hemodynamically significant stenosis, 7 were obstructed and 2 were inconclusive. The difference was significant (P< 0.05). Sensitivity of color Doppler found to be 92.4%, specificity 91.5%, positive predictive value (PPD) 86.2% and negative predictive value (NPV) 88.1%.
Conclusion: Early diagnosis of renal artery stenosis may be helpful in preventing renal hypertension. Color Doppler provides useful information in renal artery stenosis.