nyrefunksjonstest

Nyrerefunksjonstest, also known as kidney function test, refers to a variety of medical examinations used to assess how well the kidneys are working. These tests help detect kidney disease, monitor its progression, and evaluate the effectiveness of treatment. Kidneys are vital organs responsible for filtering waste products from the blood, regulating blood pressure, producing hormones, and maintaining fluid and electrolyte balance.

Commonly performed tests include blood tests and urine tests. Blood tests, such as serum creatinine and blood urea nitrogen (BUN), measure the levels of waste products in the blood that healthy kidneys would typically filter out. Elevated levels can indicate impaired kidney function. Glomerular filtration rate (GFR) is a crucial calculation derived from blood creatinine levels, age, sex, and race, providing an estimate of how much blood the kidneys filter per minute.

Urine tests, like urinalysis, examine the urine for the presence of protein, blood, white blood cells, and other abnormalities that can signal kidney damage. Proteinuria, the presence of excess protein in the urine, is a common early sign of kidney disease. Creatinine clearance, another test involving both blood and urine samples, measures how efficiently the kidneys remove creatinine from the blood over a specific time period. Imaging techniques, such as ultrasound or CT scans, may also be used to visualize the kidneys' structure and identify any physical abnormalities.