Kidney Function Test (KFT/RFT) in Siraspur, Delhi

The Kidney Function Test, also called a Renal Function Test (RFT), is a panel of blood measurements — typically including creatinine, blood urea, uric acid, and electrolytes — that together assess how efficiently your kidneys are filtering waste products from your blood.

Your kidneys perform the essential job of removing metabolic waste, balancing fluids and electrolytes, and regulating blood pressure, so even a modest decline in kidney function can have wide-reaching effects throughout the body.

Because kidney disease often develops silently over years without obvious symptoms, this panel is a key screening tool for people with risk factors like diabetes, high blood pressure, or a family history of kidney disease.

The results are also frequently combined with a calculated eGFR value, which converts your creatinine level into an estimate of your kidney's actual filtering capacity.

What a kidney function test includes

KFT (also called RFT, renal function test) usually includes serum creatinine, blood urea / BUN, uric acid, and electrolytes such as sodium, potassium and chloride, and often calcium, phosphorus and the estimated GFR (eGFR). Creatinine is a muscle waste product cleared by the kidneys, so a high level means the filters are not working well. eGFR converts creatinine, age and sex into an estimate of how many millilitres of blood the kidneys filter per minute.

Understanding eGFR and kidney stages

eGFR is used to stage chronic kidney disease (CKD): above 90 is normal if there is no other kidney damage, 60–89 mildly reduced, 30–59 moderately reduced, 15–29 severely reduced, and below 15 kidney failure. A low eGFR for three months or more, or signs of kidney damage such as protein in the urine, defines CKD. Early CKD usually has no symptoms, so testing in at-risk people is vital.

Who is at risk of kidney disease

Diabetes and high blood pressure are the two leading causes in India. Others are recurrent kidney stones, long-term painkiller (NSAID) use, family history, obesity, and some herbal products. People with these risks should have KFT and a urine albumin test at least yearly.

What can temporarily affect results

Dehydration, a very high-protein meal, intense exercise, creatine supplements and some medicines can raise creatinine or urea without permanent kidney damage. If a result is abnormal, doctors often repeat it after rehydration and rest.

Protecting your kidneys

• Keep blood sugar and blood pressure well controlled.
• Drink enough water, but do not overdrink.
• Avoid regular, unsupervised painkillers such as diclofenac and ibuprofen.
• Limit salt, and do not take unprescribed herbal or body-building supplements.
• Do not smoke; stay active and keep weight healthy.

Booking a KFT

KFT is routine and widely available, alone or in health packages. Prices vary by lab and city; compare on LabDekho, with home collection if needed. Follow the lab's fasting advice, which is often 8–12 hours when combined with sugar tests.