Mehran score for prediction of risk of contrast induced acute kidney injury in patients undergoing percutaneous coronary intervention was published by Roxana Mehran and associates in 2004 [Mehran R et al. A simple risk score for prediction of contrast-induced nephropathy after percutaneous coronary intervention: development and initial validation. J Am Coll Cardiol. 2004;44:1393-9]. They randomized data of over eight thousand three hundred patients to development and validation data sets. Data from over five thousand five hundred (clinical and procedural) were considered for univariate predictors of contrast induced acute kidney injury (contrast induced nephropathy). Eight variables – hypotension, intra aortic balloon pump usage, congestive heart failure, chronic kidney disease, diabetes, age above seventy five years, anemia and the volume of contrast, were identified. A weighted integer was assigned to each and total score was the risk score for each patient. A score of 5 or less was considered low risk; 6-10 as moderate risk; 11-15 as high risk and 16 or above as very high risk.
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