[A case report of acute kidney injury caused by high-concentration acetic acid poisoning].

High-concentration acetic acid is commonly used as a food preservative and cleaning agent. Ingestion can lead to severe complications such as hemolysis, acute kidney injury (AKI), and shock. This report documents a case of accidental ingestion of 15 ml of 80% acetic acid at Subei People's Hospital affiliated to Yangzhou University in November 2024. The patient experienced throat-cutting pain accompanied by retrosternal and epigastric burning pain after ingestion. On the second day, the patient developed significant oliguria, prompting continuous renal replacement therapy. Over the next two days, the patient's serum creatinine rose to 171 μmol/L under continuous blood purification, with arterial blood gas indicating high-anion gap metabolic acidosis (maximum anion gap 20.9 mmol/L) and urine output of 124 ml/day-447 ml/day. The patient was discharged on the fourth day, with follow-up showing gradual recovery of urine output and renal function. Even small amounts of concentrated acetic acid poisoning can cause severe conditions like AKI, and active symptomatic treatment along with blood purification remain the primary therapeutic measures.