Acute tubular necrosis (ATN) is a kidney disorder involving damage to the tubule cells of the kidneys, which can lead to acute kidney failure. The tubules are tiny ducts in the kidneys that help filter the blood when it passes through the kidneys.
ATN is often caused by a lack of blood flow and oxygen to the kidney tissues (ischemia of the kidneys). It may also occur if the kidney cells are damaged by a poison or harmful substance.
The internal structures of the kidney, particularly the tissues of the kidney tubule, become damaged or destroyed. ATN is one of the most common structural changes that can lead to acute kidney failure.
ATN is a common cause of kidney failure in people who are in the hospital. Risks for ATN include:
Liver disease and kidney damage caused by diabetes (diabetic nephropathy) may make a person more prone to develop ATN.
ATN can also be caused by medicines that are toxic to the kidneys. These medicines include aminoglycoside antibiotics and the antifungal drug amphotericin.
Symptoms may include any of the following:
The health care provider will perform a physical exam. The provider may hear abnormal sounds when listening to the heart and lungs with a stethoscope. This is due to too much fluid in the body.
Tests that may be done include:
In most people, ATN is reversible. The goal of treatment is to prevent life-threatening complications of acute kidney failure
Treatment focuses on preventing the buildup of fluids and wastes, while allowing the kidneys to heal.
Treatment may include any of the following:
Temporary dialysis can remove excess waste and fluids. This can help improve your symptoms so that you feel better. It may also make kidney failure easier to control. Dialysis may not be necessary for all people, but is often lifesaving, especially if potassium is dangerously high.
Dialysis may be needed in the following cases:
ATN can last for a few days to 6 weeks or more. This may be followed by 1 or 2 days of making an unusually large amount of urine as the kidneys recover. Kidney function often returns to normal, but there may be other serious problems and complications.
Call your provider if your urine output decreases or stops, or if you develop other symptoms of ATN.
Promptly treating conditions that can lead to decreased blood flow as well as decreased oxygen to the kidneys can reduce the risk for ATN.
Blood transfusions are crossmatched to reduce the risk of incompatibility reactions.
Diabetes, liver disorders, and heart problems need to be managed well to reduce the risk for ATN.
If you know you're taking medicine that can injure your kidneys, ask your provider about having your blood level of the medicine checked regularly.
Drink a lot of fluids after having any contrast dyes to allow them to be removed from the body and reduce the risk for kidney damage.
Reviewed By: Walead Latif, MD, Nephrologist and Clinical Associate Professor, Rutgers Medical School, Newark, NJ. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.