Kidney failure occurs when the kidneys lose their ability to function. To treat kidney failure effectively, it is important to know whether kidney disease has developed suddenly (acute) or over the long term (chronic). Many conditions, diseases, and medicines can create situations that lead to acute and chronic kidney disease. Acute kidney injury, also called acute renal failure, is more commonly reversible than chronic kidney failure since the chronic condition has lasted longer in the body affecting systems for several months to years (some decades). Acute Renal Failure is new to the body as opposed to chronic; making it higher odds this can be treated and cured.

When acute kidney injury (ARF) occurs, the kidneys are unable to remove waste products and excess fluids, which then build up in the body and upset the body’s normal chemical balance.*

The most common causes of acute kidney injury are:

-dehydration

-blood loss from major surgery or injury

-medicines such as nonsteroidal anti-inflammatory drugs (NSAIDs), antibiotics, or the dyes (contrast agents) used in X-ray tests.

Symptoms depend on the cause of acute renal failure and can include:

• -Little or no urine output.
• -Dizziness upon standing.
• -Swelling, especially of the legs and feet.
• -Loss of appetite, nausea, and vomiting.
• -Feeling confused, anxious and restless, or sleepy.
• -Pain in the flank, which is felt just below the rib cage and above the waist on one or both sides of the back.*

If your signs and symptoms suggest that you have acute kidney failure, your doctor may recommend certain tests and procedures to verify your diagnosis. These may include:

• Urine output measurements. The amount of urine you excrete in a day may help your doctor determine the cause of your kidney failure.
• Urine tests. Analyzing a sample of your urine, a procedure called urinalysis, may reveal abnormalities that suggest kidney failure.
• Blood tests. A sample of your blood may reveal rapidly rising levels of urea and creatinine — two substances used to measure kidney function.  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 loss of kidney function!**
• Imaging tests. Imaging tests such as ultrasound and computerized tomography may be used to help your doctor see your kidneys.  Also commonly done is an ultrasound of the kidneys which 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.  This helps rule out acute from chronic.–correcting the cause and supporting the kidneys with dialysis until proper functioning is restored.
• Removing a sample of kidney tissue for testing. In some situations, your doctor may recommend a kidney biopsy to remove a small sample of kidney tissue for lab testing. Your doctor inserts a needle through your skin and into your kidney to remove the sample.

TREATMENT FOR ARF (reversible in most cases)

Treatment for acute kidney failure typically requires a hospital stay. Most people with acute kidney failure are already hospitalized. How long you’ll stay in the hospital depends on the reason for your acute kidney failure and how quickly your kidneys recover.

In some cases, you may be able to recover at home.

Treating the underlying cause of your kidney failure

Treatment for acute kidney failure involves identifying the illness or injury that originally damaged your kidneys. Your treatment options depend on what’s causing your kidney failure.