Kidney Function Test: Why It’s Essential for Kidney Health

Importance of Kidney Function Tests for Early Detection

Kidneys do more than just filtering waste; they balance fluids and keep your body functioning.

A kidney function test is performed to analyse how well your kidneys are functioning. This is a report card of your kidneys.

A kidney function test checks key markers like creatinine and eGFR. This helps in detecting early signs of damage.

A regular check would benefit those with underlying diseases and a family history of kidney problems

What Is a Kidney Function Test (KFT) and Why Is It Done?

KFT involves a group of blood and urine tests that help in assessing kidney functionality. With kidney diseases on the rise in India, especially in urban places like Bangalore (Bengaluru), A KFT test is crucial to safeguard your kidneys.

What Does a Kidney Function Test (KFT) Measure?

• Creatinine
• Blood urea nitrogen (BUN)
• eGFR (estimated glomerular filtration rate)
• Uric acid
• Electrolytes
• Urinalysis
• Minerals and more

These key markers reflect how efficiently your kidneys filter waste and maintain fluid balance.

According to the National Kidney Foundation, 1 in 10 people in the India have some form of kidney disease, often without knowing it.

An early detection is possible with a simple KFT, ensuring timely treatment and better recovery.

Key Kidney Function Test Markers Explained

A typical KFT test includes multiple markers that assess different aspects of kidney function.

Here are a few important markers:

1. Serum Creatinine: What It Indicates

A waste product from muscle activity

Normal range:

• Men: 0.7 to 1.3mg/dL

• Women: 0.6 to 1.1mg/dL

High levels of creatinine mean poor filtration, a possible indication of chronic kidney disease

2. Blood Urea Nitrogen (BUN): Kidney Health Marker

It is a waste produced from protein breakdown.

Normal range:

7 to 20mg/dL

High levels indicate dehydration, kidney dysfunction, or a high-protein diet

3. eGFR (Estimated Glomerular Filtration Rate): Normal & Abnormal

This is a calculation that estimates how well your kidneys filter waste.

Normal range:

90–120 mL/min/1.73 m^2

Below 60 may indicate moderate to severe kidney disease.

4. Uric Acid Levels in Kidney Function Test

It is a waste product filtered out by your kidneys

Normal range:

• • Men: 3.5 - 7.0 mg/dL

  • Women: 1.5 - 6.0 mg/dL

Elevated levels may indicate kidney stones, poor kidney function, or gout (arthritis).

5. Electrolytes in KFT: Sodium, Potassium, Chloride & Bicarbonate

Minerals that help balance fluids and support nerve/muscle function.

Normal range:

• • Sodium: 135 - 145 mEq/L

  • Potassium: 3.5 - 5.1 mEq/L

  • Chloride: 98 - 106 mEq/L

  • Bicarbonate: 22 - 29 mEq/L

Imbalance in electrolytes can indicate dehydration, kidney or adrenal problems.

6. Calcium and Phosphorus: Bone & Kidney Health Indicators

Regulated by the kidneys, they are important for bone health.

 Normal range:

• • Calcium: 8.5 - 10.5 mg/dL

  • Phosphorus: 2.5 - 4.5 mg/dL

Abnormal levels indicate kidney disease, bone metabolism issues, or hormonal imbalance.

7. Urinalysis: Detecting Kidney Problems Through Urine

This tests urine for protein, blood, sugar, and signs of infection

Normal: 

No protein, blood or abnormal substances in the urine

Abnormal findings indicate:

Kidney damage, urinary tract infection, and diabetes related kidney issues.

Kidney Function Test (KFT) Values: Normal Ranges & Abnormal Results

Our experts recommend a KFT before starting a new medication or preparing for surgery.

What Should You Do If Your Kidney Test Results Are Abnormal?

We understand that getting abnormal results can be scary. An abnormal reading does not always mean kidney failure. Many kidney issues are treatable, especially when detected early.

Here is what you can do:

Who Should Get a Kidney Function Test (KFT)?

Not everyone needs a KFT regularly, but certain individuals should take a routine KFT test.

You may need a KFT if you:

Have diabetes 

Have high blood pressure

Have a family history of kidney disease

Take meds that affect kidney health (pain killers (NSAIDs), or certain antibiotics)

Are over the age of 50 years

1. Stay calm - Do not panic

Slightly varied values are common. Stress can worsen kidney health; focus on finding solutions.

2. Schedule a consultation with a nephrologist

A nephrologist can interpret your results accurately. NU Hospitals has the top nephrologists of Bangalore helping patients. Our experts will guide you throughout the journey. 

3. Get additional investigations

At times, values can fluctuate due to hydration, recent sickness, or temporary factors. Our nephrology specialists may suggest a re-test or additional scans for confirmation.

4. Follow a kidney-friendly diet

Reduce salt, avoid processed foods and canned drinks while staying hydrated. Our dedicated renal nutritionist will help with a tailored diet plan to support your kidney health.

5. Start the recommended treatment 

Timely action prevents worsening kidney function. Whether it is medication, lifestyle changes, or further evaluations.

6. Monitor regularly

Stay on top of your health with regular follow-ups and repeat KFTs, especially if you have conditions like diabetes or hypertension

7. Take care of yourself completely

Exercise, manage stress, and sleep well. Your kidneys are connected to your overall well-being.

At NU Hospitals, we do not just treat numbers; we care for people. Our compassionate team will help you understand every step and work with you to improve your kidney health.