What is a central vascular access device (CVAD)? A CVAD is a thin, flexible tube. It's also called a central line. It is used when a person needs to receive medicine, fluids, nutrients, or blood products for several weeks or more. It's often placed in the neck, chest, or arm. Why is it used? CVADs are used to: Give...

What is bird flu? Bird flu is an infection caused by a certain kind of avian influenza virus. Although there are many kinds of bird flu, the most common kinds that concern health workers are H5N1 and H7N9 bird flu viruses. These viruses are found in wild birds. Most of the time, wild birds don't get sick from the virus...

An arterial blood gases (ABG) test measures the acidity ( pH) and the levels of oxygen and carbon dioxide in the blood from an artery. This test is used to find out how well your lungs are able to move oxygen into the blood and remove carbon dioxide from the blood. As blood passes through your lungs, oxygen moves into...

Acute kidney injury, also called acute renal failure, is the sudden loss of kidney function. When acute kidney injury 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...

The stages of chronic kidney disease are determined mostly by the estimated glomerular filtration rate (eGFR). Glomerular filtration is the process by which the kidneys filter the blood, removing excess wastes and fluids. The eGFR is a calculation...

Rhabdomyolysis is a process in which dying muscle cells cause the toxic buildup of certain substances in the blood. Some of these substances are creatine, myoglobin, aldolase, potassium, and lactate dehydrogenase. Left untreated, rhabdomyolysis can cause life-threatening damage to body organs, including kidney failure...

An abdominal X-ray is a picture of structures and organs in the belly (abdomen). This includes the stomach, liver, spleen, and large and small intestines. It also includes the diaphragm, which is the muscle that separates the chest and belly areas.

Nephrologists are medical doctors who specialize in the diagnosis and treatment of diseases of the kidneys, such as inflammation of the kidneys, chronic kidney disease, or cancer. Nephrologists may further specialize in treating certain age groups, such as pediatric nephrologists, who only treat children. Nephrologists...

Hepatitis B vaccine can prevent hepatitis B. Hepatitis B is a liver disease that can cause mild illness lasting a few weeks, or it can lead to a serious, long illness. Acute hepatitis B is a short-term illness that can lead to fever, fatigue, loss of appetite, nausea, vomiting, jaundice...

What is rhabdomyolysis? Rhabdomyolysis (say "rab-doh-my-AH-luh-suss") is a rare but serious muscle problem. When you have it, your muscle cells break down, or dissolve. The contents of those cells leak into the blood. When it's in the blood, that material can travel to various parts of the body and cause problems. If...

Uremia (uremic syndrome) is a serious complication of chronic kidney disease and acute kidney injury (which used to be known as acute renal failure). It occurs when urea and other waste products build up in the body because the kidneys are unable to eliminate them. These substances can become poisonous (toxic) to the...