Acquired Bartter-like Syndrome Presenting with Polyuria and Reversible Hypokalemia Associated with Colistin Use in a Critically Ill Pediatric Patient.

We report a case of an acquired Bartter-like syndrome (BLS) after 3 days of treatment initiation and improved after discontinuation of colistin therapy in pediatric intensive care unit. A 2-month-old girl with spinal muscular atrophy type 1 who had respiratory distress received colistin therapy with a dose of 5 mg/kg/day for Acinetobacter baumannii complex isolation from endotracheal aspirate on the 12th day follow-up. Polyuria (6 mL/kg/hour) in the presence of normal blood pressure and hypokalemic metabolic alkalosis were developed on the 3rd day of colistin treatment. Colistin was stopped on the 4th day, and 2 days after discontinuation of colistin, polyuria improved dramatically. Her metabolic alkalosis and hypokalemia discontinued after 2 and 4 days, respectively. There are very few reports about colistin-induced BLS. The onset of polyuria, hypokalemia, and metabolic alkalosis during treatment with colistin and resolution after interruption suggest a causative relationship. How to cite this article: Yavas DP, Ekinci F, Horoz OO, Gundeslioglu OO, Atmis B, Yildizdas D. Acquired Bartter-like Syndrome Presenting with Polyuria and Reversible Hypokalemia Associated with Colistin Use in a Critically Ill Pediatric Patient. Indian J Crit Care Med 2021;25(7):822-824.