Q. What are the common markers measured in a kidney function test, and what do they indicate about kidney health?
Doctor Answer is medically reviewed by SecondMedic medical review team.
In a kidney function test, also known as a kidney test or KFT test, several markers are typically measured to assess the health of your kidneys. Let's break down what each marker indicates:
1. Creatinine: Creatinine is a waste product generated from muscle metabolism. Healthy kidneys filter creatinine out of the blood and excrete it in urine. Elevated levels of creatinine in the blood suggest impaired kidney function because the kidneys are not effectively removing it.
2. Blood Urea Nitrogen (BUN): BUN is a waste product formed from the breakdown of proteins in the liver. Like creatinine, BUN is filtered by the kidneys and excreted in urine. Elevated BUN levels may indicate kidney dysfunction or dehydration, as the kidneys may retain more urea.
3. Glomerular Filtration Rate (GFR): GFR measures how efficiently the kidneys filter waste from the blood. It's considered one of the best indicators of kidney function. A lower GFR suggests reduced kidney function, which can be indicative of chronic kidney disease (CKD) or other kidney issues.
4. Albumin: Albumin is a protein in the blood, and its presence in urine (albuminuria) can be a sign of kidney damage. Healthy kidneys filter out waste while retaining essential proteins like albumin. Detecting albumin in urine may indicate kidney disease or damage to the kidney's filtration units (glomeruli).
5. Electrolytes (Sodium, Potassium, Chloride): These are minerals essential for various bodily functions, including maintaining fluid balance, nerve function, and muscle contractions. Abnormal levels of electrolytes in the blood can indicate kidney dysfunction, as the kidneys play a crucial role in regulating electrolyte balance.
6. Uric Acid: Uric acid is a waste product produced from the breakdown of purines, substances found in certain foods and body tissues. Elevated uric acid levels can be associated with conditions like gout or kidney stones, which can affect kidney function.
Regular monitoring of these markers through kidney function tests helps healthcare providers assess kidney health, diagnose conditions early, and monitor the progression of kidney diseases. If any abnormalities are detected, further evaluation and treatment may be necessary to manage kidney issues effectively. Remember, early detection and management are key to maintaining kidney health.
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