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Severe anion gap acidosis associated with intravenous sodium thiosulfate administration
Michael Mao1, Sarah Lee, Kianoush Kashani
1Division of Nephrology and Hypertension, Department of Medicine, Mayo Clinic Rochester, Rochester, MN, USA.
Introduction:
Severe anion gap (AG) acidosis associated with intravenous sodium thiosulfate (STS) administration has not been previously described in nondialysis chronic kidney disease (CKD) patients.
Case Report:
We present a CKD patient with a baseline creatinine 1.8 mg/dL (eGFR 28 ml/min/1.73 m²) who developed sustained and life-threatening AG acidosis associated with intravenous STS treatment for calciphylaxis.
Discussion:
Although marketed as a safe drug, STS can cause life-threatening acidosis as illustrated in this case. STS-induced AG acidosis should be considered in the differential diagnosis of severe acidosis in patients receiving STS. Dosage adjustment and close follow-up of patients' acid-base status after STS initiation is necessary.
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