Kidney outcomes 5 years after pediatric cardiac surgery the TRIBE-AKI study

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Abstract

IMPORTANCE Acute kidney injury (AKI) after pediatric cardiac surgery is associated with high short-term morbidity and mortality; however, the long-term kidney outcomes are unclear. OBJECTIVE To assess long-term kidney outcomes after pediatric cardiac surgery and to determine if perioperative AKI is associated with worse long-term kidney outcomes. DESIGN, SETTING, AND PARTICIPANTS This prospective multicenter cohort study recruited children between ages 1 month to 18 years who underwent cardiopulmonary bypass for cardiac surgery and survived hospitalization from 3 North American pediatric centers between July 2007 and December 2009. Children were followed up with telephone calls and an in-person visit at 5 years after their surgery. EXPOSURES Acute kidney injury defined as a postoperative serum creatinine rise from preoperative baseline by 50% or 0.3mg/dL or more during hospitalization for cardiac surgery. MAIN OUTCOMES AND MEASURES Hypertension (blood pressure 95th percentile for height, age, sex, or self-reported hypertension), microalbuminuria (urine albumin to creatinine ratio >30mg/g), and chronic kidney disease (serum creatinine estimated glomerular filtration rate [eGFR] <90 mL/min/1.73m2 or microalbuminuria). RESULTS Overall, 131 children (median [interquartile range] age, 7.7 [5.9-9.9] years) participated in the 5-year in-person follow-up visit; 68 children (52%) were male. Fifty-seven of 131 children (44%) had postoperative AKI. At follow-up, 22 children (17%) had hypertension (10 times higher than the published general pediatric population prevalence), while 9 (8%), 13 (13%), and 1 (1%) had microalbuminuria, an eGFR less than 90 mL/min/1.73m2, and an eGFR less than 60mL/min/1.73m2, respectively. Twenty-one children (18%) had chronic kidney disease. Only 5 children (4%) had been seen by a nephrologist during follow-up. Therewas no significant difference in renal outcomes between children with and without postoperative AKI. CONCLUSIONS AND RELEVANCE Chronic kidney disease and hypertension are common 5 years after pediatric cardiac surgery. Perioperative AKI is not associated with these complications. Longer follow-up is needed to ascertain resolution or worsening of chronic kidney disease and hypertension.

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Greenberg, J. H., Zappitelli, M., Devarajan, P., Thiessen-Philbrook, H. R., Krawczeski, C., Li, S., … Parikh, C. R. (2016). Kidney outcomes 5 years after pediatric cardiac surgery the TRIBE-AKI study. JAMA Pediatrics, 170(11), 1071–1078. https://doi.org/10.1001/jamapediatrics.2016.1532

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