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We studied the usefulness of preoperative resistance index to select patients who will benefit most from renal stenting. Sixty-two patients underwent renal stenting. All had chronic renal insufficiency with serum creatinine values ranging from 1.5 to 2.5 mg/dL and blood urea nitrogen between 80 and 107 mg/dL. All treated renal artery stenosis were >70%. Reduction in blood pressure in the early stages was observed in 39 (62.9%) patients; 31 (79.4%) patients returned to preoperative values within 12 months. A progressive reduction in creatinine values and blood urea nitrogen was reached in 43 (69.4%) patients, 12 (19.4%) patients remained unchanged, and the remaining 7 (11.2%) patients worsened. The best improvement in renal function was obtained in patients with a resistance index of ≤0.75 A preoperative resistance index up to 0.75 could be used as an indicator to predict which candidates will have improved renal function after stenting. [ABSTRACT FROM AUTHOR]

The author reflects on the treatment for renal atherosclerotic artery atenosis by stenting and medical methods. Topics discussed include studies concerning clinical trials of the Angioplasty and Stenting for Renal Artery Lesions trial and the Cardiovascular Outcomes in Renal Atherosclerotic Lesions trial, and renal resistive index (RI) as an accepted marker of vascular interstitial damage to the kidneys.