Most people only think about their kidneys when something goes wrong. Yet chronic kidney disease can quietly destroy up to 90% of kidney function before a single symptom appears. A kidney function test in Thane is a simple blood and urine check that can reveal trouble years before swelling, fatigue or changes in urination show up.
In India, diabetes and high blood pressure are driving a steady rise in kidney disease, and most cases are found late. The good news: the tests that catch it early are quick, affordable and widely available right here in Kalwa.
What Is a Kidney Function Test (KFT)?
A kidney function test, also called a renal function test or KFT, is a group of blood and urine tests that show how well your kidneys filter waste from your blood. Healthy kidneys remove excess fluid, balance minerals and control blood pressure. When filtering slows down, waste products build up in the bloodstream.
A standard KFT panel at a pathology lab usually includes serum creatinine, blood urea, blood urea nitrogen (BUN), uric acid, and electrolytes such as sodium, potassium and calcium. Your lab then calculates the eGFR from your creatinine, age and sex.
Creatinine, eGFR and Urea: How to Read Your Report
Understanding the numbers turns a confusing printout into useful information. Here is what each marker tells you.
- Serum creatinine: a waste product from muscle activity. Typical adult ranges are roughly 0.6 to 1.3 mg/dL, varying by lab, age and muscle mass. A rising value suggests the kidneys are filtering less efficiently.
- eGFR (estimated glomerular filtration rate): the most useful single number. An eGFR above 90 is normal; below 60 for three months or more points to chronic kidney disease.
- Blood urea and BUN: raised levels can reflect poor kidney function, but also dehydration or a high-protein diet, so doctors read them alongside creatinine.
- Uric acid: high levels are linked to gout and kidney stones, and can strain the kidneys over time.
- Electrolytes: abnormal potassium or sodium can signal kidney trouble and, in some cases, affect heart rhythm.
Reference ranges differ between laboratories, so always interpret your results with your doctor rather than relying on a single flagged value.
Urine Tests and Kidney Ultrasound: The Missing Half of the Picture
Blood tests alone can miss early damage. A urine albumin-to-creatinine ratio (ACR) detects tiny amounts of protein leaking through damaged filters, often the very first sign of diabetic kidney disease. A routine urine examination can also show blood, infection or crystals.
When results are abnormal, or when there is pain, recurrent infections or a family history of stones, doctors often advise a kidney ultrasound (sonography). It shows kidney size, shape, stones, cysts, swelling from blocked urine flow and signs of long-standing damage, with no radiation and no injections. Preparation is usually simple: drink water and arrive with a comfortably full bladder, as advised by the centre.
Who Should Get a Kidney Function Test?
Kidney disease is often called a silent condition, so screening matters more than symptoms. Consider a KFT at least once a year if you:
- Have diabetes or prediabetes, since high sugar damages the kidney’s tiny filters.
- Live with high blood pressure, which both causes and results from kidney damage.
- Are over 40, overweight or have a family history of kidney disease.
- Use painkillers such as NSAIDs regularly, or take long-term medicines your doctor has asked you to monitor.
- Have had kidney stones, frequent urinary infections or heart disease.
Do not wait for symptoms. Warning signs that need prompt testing include puffiness around the eyes or ankles, foamy urine, reduced or increased urination, persistent itching, unexplained tiredness, nausea and loss of appetite.
How to Prepare and What to Expect
A KFT needs only a small blood sample and a urine sample. Fasting is usually not essential for creatinine and urea, but follow the instructions given when you book your test, especially if other tests such as blood sugar are added to the same visit. Avoid heavy exercise and very high-protein meals the day before, and drink water normally.
Many people combine a KFT with an HbA1c, lipid profile and liver panel as part of a full-body checkup. Bundling tests is often more economical and gives your doctor a complete picture of your metabolic health. You can see all options on our services page, and reports are typically ready quickly so your doctor can act without delay.
Frequently Asked Questions
What is the normal range for a kidney function test?
Normal serum creatinine for most adults is about 0.6 to 1.3 mg/dL, and a healthy eGFR is 90 or above. Ranges vary slightly by laboratory, age, sex and muscle mass, so your doctor should interpret your report.
Is fasting required for a kidney function test?
Usually no. Creatinine and urea can be tested without fasting. However, if blood sugar or lipid tests are done at the same time, fasting for 8 to 10 hours may be needed, so confirm when booking.
How often should I get my kidneys tested?
Healthy adults can test every one to two years after 40. People with diabetes, high blood pressure or a family history of kidney disease should test at least once a year, or as their doctor advises.
Book Your Kidney Function Test in Kalwa, Thane
Early detection protects your kidneys, and a simple test can change the outcome. Kaizen Diagnostic Centre offers kidney function tests, urine examination and kidney sonography under one roof. Book a test online or contact us with your questions.
📞 Call: 970 299 3460
📍 Times House, Kalwa Naka, Kalwa (W), Thane
💬 Chat on WhatsApp
This article is for general awareness and does not replace medical advice. Please consult your doctor about your results.
