The presence or lack of symptoms may help your doctor determine whether acute kidney injury or chronic kidney disease is present. Most cases of acute kidney injury occur in people who are already in the hospital for other reasons.
In these people, acute kidney injury is usually diagnosed when routine tests show a sudden increase in creatinine and blood urea nitrogen BUN levels.
A buildup of these waste products in the blood points to a decrease of kidney function. Your doctor will compare these levels to previous tests to find out if your kidney problem is acute or chronic. An ultrasound of the kidneys also may help determine whether kidney problems are acute or chronic.
Normal-sized kidneys may be present in either condition, but when both kidneys are smaller than normal, chronic kidney disease is usually the problem. Author: Healthwise Staff.
Medical Review: E. This information does not replace the advice of a doctor. Healthwise, Incorporated, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use.
Acute kidney failure is the sudden loss of this important ability. If your kidneys have experienced a direct injury or an obstruction, you are at risk. Although the condition can be life-threatening, it can also be reversible. Acute kidney failure is the sudden and dramatic loss of kidney function. This condition develops rapidly, often in just a few days. Healthy kidneys filter and remove wastes and excess fluid from blood and turn it into urine. When you encounter acute kidney failure, the kidneys are operating at less than 10 percent of normal function.
This means wastes such as creatinine and urea nitrogen build up in the bloodstream. If this waste is not removed, you can feel extremely ill. Renal failure symptoms can be difficult to detect. Acute renal failure may occur for a variety of reasons:. Obstructions in the urinary tract or renal artery can initiate acute kidney failure. Tumors, kidney stones or an enlarged prostate can block the flow of urine in the urinary tract. A blockage in the renal artery cuts off the supply of oxygen to the kidneys, and kidneys need oxygen to function.
Shock or trauma to the body can lead to low blood pressure. Sometimes the stress of surgery on the body can lower blood pressure to dangerous levels. Extremely low blood pressure means there is a decrease in blood flow, and kidneys will not receive oxygen or filter blood as efficiently as before. One of the most obvious renal failure symptoms is a decrease of urine. This symptom occurs in 70 percent of cases. Many people with acute kidney failure only create 16 ounces of urine a day the average adult urinates between 34 to 50 ounces per day.
When urine output is low, fluid retention occurs, causing swelling in the legs, feet and ankles. Normal-sized kidneys may be present in either condition, but when both kidneys are smaller than normal, chronic kidney disease is usually the problem. Author: Healthwise Staff. Medical Review: E. This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information.
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