Kidney Function Test (KFT) in Hisar
Kidney · Blood · Hisar, Haryana
Available at 1 lab
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4.5 24h
₹720₹649
About this test
What is a Kidney Function Test (KFT)?
A KFT is a blood test that evaluates how well your kidneys are filtering waste and maintaining balance of fluids, electrolytes, and proteins in your body.
Key Parameters
| Parameter | What it shows |
|---|---|
| Serum Creatinine | Kidney’s ability to clear creatinine, a waste product of muscle metabolism |
| Blood Urea Nitrogen (BUN) | Amount of nitrogen waste in blood; high levels may indicate impaired filtration |
| Estimated Glomerular Filtration Rate (eGFR) | Calculated rate of blood filtration; lower values suggest reduced kidney function |
| Electrolytes (Sodium, Potassium, Chloride) | Balance of key minerals; abnormalities can signal kidney or other systemic issues |
| Albumin | Protein level; low albumin may reflect kidney loss or liver disease |
Why is it done?
- Routine health check‑ups
- Evaluation of symptoms such as swelling, fatigue, or changes in urine
- Monitoring chronic kidney disease or other conditions that affect kidneys
- Screening for early signs of kidney impairment before symptoms appear
Early Detection
KFT can help identify signs of chronic kidney disease, acute kidney injury, or electrolyte imbalance, but it does not diagnose a disease on its own. A doctor interprets the results with your history, symptoms, and other tests.
What Abnormal Results Mean
- High creatinine or BUN: may indicate reduced filtration, dehydration, or high protein intake
- Low eGFR: suggests impaired kidney function; the exact cause requires further investigation
- Electrolyte imbalances: can arise from kidney dysfunction, medications, or dietary factors
Many factors—hydration status, recent meals, certain drugs, and muscle mass—can influence these values.
Who Should Consider It?
- Adults with risk factors such as hypertension, diabetes, or a family history of kidney disease
- Individuals experiencing symptoms like swelling, unexplained fatigue, or changes in urine
- Patients on medications that affect kidney function (e.g., NSAIDs, ACE inhibitors)
- Those undergoing routine health screening
Quick Takeaway
A KFT is a simple blood test that checks kidney health by measuring waste products and electrolytes. It’s useful for early detection and monitoring but must be interpreted by a healthcare professional.
Used for detecting / monitoring
Before your test
Preparation for a Kidney Function Test
- Fasting: No fasting required for KFT. If you are also having a fasting blood sugar or lipid panel, follow the strictest instruction (usually 8‑12 hours).
- Medication: Continue your regular medications unless your doctor advises otherwise. If you are on ACE inhibitors or ARBs, inform the lab as they can slightly raise creatinine.
- Hydration: Drink plenty of water the day before to avoid dehydration, which can elevate creatinine and BUN.
- Avoid strenuous exercise: Refrain from heavy workouts 24 hours before the test, as muscle breakdown can increase creatinine.
- Procedure: A healthcare professional will insert a needle into a vein (usually in the arm) and draw about 5–10 mL of blood. The process takes 5–10 minutes.
- After the test: Apply pressure to the puncture site, keep it clean, and avoid heavy lifting for a few hours.
- What to expect: A brief needle prick and a small amount of discomfort; most people feel fine afterward.
Please confirm the exact preparation details with your doctor or the laboratory before the appointment.
This information is for educational purposes only and does not replace professional medical advice.
Sample type: Blood
Report parameter guide
Blood Urea Nitrogen (BUN)
Measures the amount of nitrogen in the blood that comes from the waste product urea, indicating how well kidneys are filtering waste.
Low: Can indicate overhydration, low protein intake, or liver disease.
High: May indicate dehydration, kidney dysfunction, high protein diet, or heart failure.
Serum Creatinine
Measures the level of creatinine, a waste product from muscle metabolism, reflecting kidney filtration efficiency.
Low: Can suggest low muscle mass, malnutrition, or certain medications that lower creatinine production.
High: May indicate impaired kidney function, dehydration, high muscle breakdown, or certain medications that increase creatinine.
Estimated Glomerular Filtration Rate (eGFR)
Calculates how well the kidneys filter blood, expressed in milliliters per minute per 1.73 m².
Low: Can indicate reduced kidney filtration, chronic kidney disease, or acute kidney injury.
High: Rarely high; may reflect overestimation due to low muscle mass or certain lab errors.
Urea
Measures the amount of urea, a waste product from protein breakdown, in the blood.
Low: Can indicate low protein intake, liver disease, or overhydration.
High: May indicate dehydration, kidney dysfunction, high protein diet, or gastrointestinal bleeding.
Creatinine Clearance
Assesses the volume of blood cleared of creatinine per minute, estimating kidney filtration capacity.
Low: Can indicate decreased kidney filtration, chronic kidney disease, or acute kidney injury.
High: May suggest overestimation due to low muscle mass or certain lab errors.