Kidney Function Test (KFT)
Test code: BCM0350
- Sample
- Blood
- Preparation
- No special preparation
- Report
- Within 3 Hours
- Processed
- Mon to Sun, by 06:00 PM
About this test
A Kidney Function Test (KFT), also called a Renal Function Test (RFT), is a group of blood tests that shows how well your kidneys filter waste and balance fluids and minerals. It helps detect kidney disease early, especially in people with diabetes or high blood pressure, and monitors kidney health during treatment.
Preparation & sample
No special preparation required. Drink water as usual, and tell us about any medicines you take, especially painkillers.
What does this test measure?
A KFT usually includes:
- Creatinine: a waste product from muscles that healthy kidneys remove. It is used to estimate how well your kidneys filter (eGFR).
- Urea / Blood Urea Nitrogen (BUN): a waste product from protein breakdown
- Uric acid: high levels can cause gout and kidney stones
- Electrolytes (sodium, potassium, chloride): minerals your kidneys keep in balance
- Calcium and phosphorus in some panels
When should you get this test?
- If you have diabetes or high blood pressure, the two most common causes of kidney disease (usually at least once a year)
- Swelling of the feet, ankles or face
- Passing much more or much less urine than usual, or foamy urine
- Tiredness, nausea or loss of appetite
- A family history of kidney disease or kidney stones
- Long-term use of painkillers or other medicines that can affect the kidneys
- As part of a routine health check-up
Understanding your results
- High creatinine and urea can mean your kidneys are not filtering well. Dehydration, a high-protein diet, heavy exercise and some medicines can also raise them temporarily.
- eGFR estimates your kidney filtering capacity. An eGFR below 60 for more than 3 months suggests chronic kidney disease.
- High uric acid is linked to gout and kidney stones and is influenced by diet, alcohol and weight.
- Abnormal sodium or potassium can affect your heart and muscles and may need prompt attention.
Kidney disease often causes no symptoms in its early stages, so regular testing is the best way to catch it early.
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