What is renal failure?
Renal failure refers to temporary or permanent damage to the kidneys that results in loss of normal kidney function. There are two different types of renal failure—acute and chronic. Acute renal failure has an abrupt onset and is potentially reversible. Chronic renal failure progresses slowly over at least three months and can lead to permanent renal failure. The causes, symptoms, treatments, and outcomes of acute and chronic are different.
Conditions that may lead to acute or chronic renal failure may include, but are not limited to, the following:
Acute Renal Failure
Chronic Renal Failure
Decreased blood flow to the kidneys for a period of time. This may occur from blood loss, surgery, or shock.
A prolonged urinary tract obstruction or blockage.
An obstruction or blockage along the urinary tract.
Alport syndrome—an inherited disorder that causes deafness, progressive kidney damage, and eye defects.
Hemolytic uremic syndrome—usually caused by an E. coli infection, kidney failure develops as a result of obstruction to the small functional structures and vessels inside the kidney.
Nephrotic syndrome—a condition that has several different causes. Nephrotic syndrome is characterized by protein in the urine, low protein in the blood, high cholesterol levels, and tissue swelling.
Ingestion of certain medications that may cause toxicity to the kidneys.
Polycystic kidney disease—a genetic disorder characterized by the growth of numerous cysts filled with fluid in the kidneys.
Glomerulonephritis—a type of kidney disease that involves glomeruli. During glomerulonephritis, the glomeruli become inflamed and impair the kidney's ability to filter urine.
Cystinosis—an inherited disorder in which the amino acid cystine (a common protein-building compound) accumulates within specific cellular bodies of the kidney, known as lysosomes.
Any condition that may impair the flow of oxygen and blood to the kidneys such as cardiac arrest.
What are the symptoms of renal failure?
The symptoms for acute and chronic renal failure may be different. The following are the most common symptoms of acute and chronic renal failure. However, each child may experience symptoms differently.
Acute symptoms may include:
(Symptoms of acute renal failure depend largely on the underlying cause.)
No urine output or high urine output
History of recent infection
History of taking certain medications
History of trauma
Swelling of the tissues
Inflammation of the eye
Detectable abdominal mass
Exposure to heavy metals or toxic solvents
Chronic symptoms may include:
High urine output or no urine output
Recurrent urinary tract infections
Detectable abdominal mass
Poor muscle tone
Change in mental alertness
The symptoms of acute and chronic renal failure may resemble other conditions or medical problems. Always consult your child's physician for a diagnosis.
How is renal failure diagnosed?
In addition to a physical examination and complete medical history, your child's physician may order the following diagnostic tests:
Blood tests. Blood tests will determine blood cell counts, electrolyte levels, and kidney function.
Chest X-ray. A diagnostic test that uses invisible electromagnetic energy beams to produce images of internal tissues, bones, and organs onto film.
Bone scan. A nuclear imaging method to evaluate any degenerative and/or arthritic changes in the joints; to detect bone diseases and tumors; to determine the cause of bone pain or inflammation.
Renal ultrasound (also called sonography). A noninvasive test in which a transducer is passed over the kidney producing sound waves which bounce off the kidney, transmitting a picture of the organ on a video screen. The test is used to determine the size and shape of the kidney, and to detect a mass, kidney stone, cyst, or other obstruction or abnormalities.
Renal biopsy. This procedure involves the removal of tissue samples (with a needle or during surgery) from the body for examination under a microscope.