Índice de Angina Renal como Predictor de Lesión Renal Aguda en Urgencias

Introduction: Serum creatinine elevations are associated with adverse renal outcomes, analogous to troponin I in myocardial ischemia, where early evaluation and therapeutic intervention are crucial. The Renal Angina Index (RAI) represents an informative model applicable to the context of acute kidney injury (AKI). Utilizing this index as a marker allows for timely management, providing benefits to patients. Objective: To determine the Renal Angina Index as a predictor of acute kidney injury in the emergency department. Materials and Methods: A prospective, single-center, observational, cross-sectional study was conducted at the Emergency Department of HGZ #23 in Teziutlán, Puebla. Rightsholder patients admitted to the emergency department with a risk of developing AKI were included. Non-probabilistic consecutive sampling was applied. The RAI formula was utilized, and laboratory tests were performed to evaluate the development of AKI during hospitalization. Results: A total of 100 patients were analyzed, with a mean age of 62.5 years (±15.3); 54 (54%) were male and 46 (46%) female. The most frequent diagnosis was urinary tract infection (23%). Among the patients evaluated, 29 developed AKI, of whom 6 had an RAI >8. A chi-square test yielded a value of 15.6 with a p-value of 0.000, and Spearman’s correlation showed a moderately positive correlation (r = 0.556, p = 0.000). The RAI demonstrated a specificity of 100%, sensitivity of 20.6%, positive predictive value of 100%, and negative predictive value of 75.5%. Conclusion: This study demonstrates that a Renal Angina Index (RAI) >8 effectively predicts acute kidney injury (AKI) in the emergency department. Its high sensitivity establishes it as a useful initial test to anticipate AKI and facilitate preventive interventions.