1. What is a Kidney Function Test (KFT)?
A Kidney Function Test, commonly called Kidney Function Test, is a group of blood and urine tests used to evaluate how well the kidneys are functioning.
2. Why is a KFT done?
Doctors may recommend a KFT to check kidney health, diagnose kidney diseases, monitor diabetes or high blood pressure, and assess the effects of medications on the kidneys.
3. What are the common components of a KFT?
A KFT commonly includes blood urea, serum creatinine, uric acid, electrolytes (sodium, potassium), and estimated glomerular filtration rate (eGFR).
4. How is the test performed?
The test is usually performed by collecting a blood sample from a vein in the arm. In some cases, a urine sample may also be required.
5. Is fasting required before a KFT?
Yes, fasting for 8–10 hours may be advised before a Kidney Function Test, depending on the doctor’s instructions and whether additional tests are being performed along with it.
6. Can I drink water before the test?
Yes, plain water is generally allowed during fasting and helps maintain hydration for easier blood sample collection.
7. What should be avoided before the test?
Patients should avoid alcohol, excessive protein intake, strenuous exercise, and certain medications unless advised otherwise by their doctor.
8. What do abnormal KFT results mean?
Abnormal results may indicate kidney infection, dehydration, kidney stones, chronic kidney disease, diabetes-related kidney damage, or other kidney problems.
9. Can medications affect KFT results?
Yes, some medicines such as painkillers, antibiotics, blood pressure medicines, and supplements can affect kidney function test results. Patients should inform their doctor about all medications they are taking.
10. Are Kidney Function Tests painful or risky?
The test is generally safe and quick. Mild discomfort or bruising may occur at the blood collection site, but serious complications are rare.
11. How often should Kidney Function Tests be done?
The frequency depends on the patient’s age, medical condition, diabetes, blood pressure, kidney disease history, and doctor’s advice.