Acute Tubular Necrosis (ATN)

Acute Tubular Necrosis (ATN) is a condition that affects the kidneys, specifically the tiny tubes called tubules inside them. It happens when these tubules get damaged, often due to a lack of blood flow or exposure to harmful substances. This damage makes it hard for the kidneys to filter waste and balance fluids properly, leading to a sudden decrease in kidney function. People with ATN may experience symptoms related to kidney failure, such as swelling, fatigue, and changes in urine output. The condition is serious because the kidneys play a crucial role in keeping the body healthy by removing toxins and maintaining fluid balance.

Acute Tubular Necrosis (ATN) is a form of intrinsic acute kidney injury characterized by ischemic or nephrotoxic injury to the renal tubular epithelial cells, leading to tubular cell death and impaired renal function. The most common causes include prolonged renal ischemia from hypotension or shock and exposure to nephrotoxins such as aminoglycosides, radiocontrast agents, or myoglobin. Pathologically, ATN involves loss of the tubular epithelial brush border, tubular cell necrosis, and luminal obstruction by cellular debris. Clinically, it presents with oliguria, elevated serum creatinine, and electrolyte abnormalities such as hyperkalemia. It is a major cause of acute kidney injury in hospitalized patients and can lead to significant morbidity and mortality if not recognized and managed promptly.