This is a simple calculator that allows physicians to determine the probability of Renal Artery Stenosis based on a patients clinical parameters. By setting the clinical parameters (Sex, Age, Creatnine etc.) and hitting calculate, one can easily determine the pretest probability of RAS. This equation is just as sensitive as Renal Scintigraphy when a pretest probability of 30% is used for angiography. Do you have Renal Artery Stenosis? Download and find out!