The Creatinine Serum Test: Everything You Need To Know 

Are you curious about a creatinine serum test and what it can tell you about your health? Creatinine is a waste product of creatine metabolism produced by the kidneys and excreted in the urine. The creatinine serum test measures the amount of creatinine in your blood. It is used to screen for, diagnose, and monitor various conditions, such as kidney disease and heart failure. This blog will discuss the purpose of the creatinine serum test, how it is conducted, and the results. We will also explore creatinine serum tests’ benefits and potential risks associated with your health.

Why do you need to take the Creatinine Serum Test?

The creatinine serum test is a valuable diagnostic tool used to measure the level of creatinine in the blood. Creatinine is a byproduct of muscle metabolism and is typically excreted by the kidneys.

  • Abnormal creatinine levels indicate various conditions, including kidney disease, dehydration, and muscle damage. 
  • The creatinine serum test is used to assess, diagnose kidney disease, and detect changes in kidney function over time. 
  • It is also used to help diagnose and monitor more health conditions. There are diabetes, high blood pressure, and heart disease, all of which can affect kidney health.

The test is usually prescribed when a doctor suspects a person has a kidney disorder. Apart from this, the test should be done when monitoring kidney function.

How is the Creatinine Serum Test carried out?

The creatinine serum test is usually performed as a routine blood test. 

  • A small blood sample is taken from a vein in the arm and then sent to a laboratory for analysis. 
  • The laboratory measures the creatinine level in the blood sample and reports the results to the doctor. The test results calculate a person’s estimated glomerular filtration rate (eGFR). 
  • With this filtration rate, doctors can assess how well the kidneys function. 
  • The creatinine serum test result is usually out in 24 hours.

How much does it take to carry out different creatinine serum tests?

There are several different types of creatinine serum tests available in India. These include creatinine clearance test, blood urea nitrogen test, and creatinine to creatinine ratio (Cr/Cr) test. The cost of a creatinine serum test varies depending on the type of test and the laboratory. Generally, the cost of a creatinine serum test can range from around Rs 500 to Rs 700.

Different Creatinine Serum Tests and their approximate cost in India are as follows:

  • Creatinine Serum Test: Rs. 500 – 700.
  • Creatinine Clearance Test: Rs. 150 – 200.
  • Creatinine Kinase Test: Rs. 150 – 1180.
  • Creatinine Phosphokinase Test: Rs. 220 – 500.
  • Creatinine Urine Test: Rs. 65 – 260.

Potential risks of taking the Creatinine Serum Test  

Taking the creatinine serum test can be risky, as it involves drawing a blood sample from the patient. 

  • The potential risks associated with this procedure include infection, bruising, and pain at the injection site.
  • Additionally, chances of an allergic reaction to the test, such as hives, swelling, and difficulty in breathing. 
  • Temporarily high or low creatinine levels in the blood due to changes in diet or medication.
  • Increased risk of kidney stones, especially in people already at risk of developing them.
  • Patients should be aware that the results of the Creatinine Serum Test can be misleading. 
  • Other conditions, such as dehydration or kidney disease, may affect the results. 

So, discussing any potential risks with your doctor before taking the test is essential.

Benefits of Creatinine Serum Test

A Creatinine Serum Test measures the creatinine levels in the blood. It is used to evaluate kidney function and detect conditions like kidney disease. The test also monitors the effectiveness of specific treatments, such as dialysis. 

Benefits of this test include:

  • Accurate and reliable: The creatinine serum test is an accurate and reliable measure of kidney function. And it has very few false-positive or false-negative results.
  • Early detection: Creatinine serum test can detect early signs of kidney disease, allowing for early diagnosis and treatment.
  • Easy to administer: The creatinine serum test is a simple laboratory test that can be done in most medical settings. It requires only a blood sample, and the results are available quickly.
  • Cost-effective: The creatinine serum test is relatively less expensive than other tests.

Some valuable guidelines to follow:

A creatinine serum test is a part of a comprehensive metabolic panel to evaluate kidney function.

The following guidelines are recommended before a creatinine serum test:

1. Follow fasting instructions: The test should be performed after an overnight fast of at least 8 hours.

2. Avoid strenuous activity the day before: Avoid strenuous exercise or activities that can cause dehydration the day before the test.

3. Hydrate adequately: Drink plenty of fluids before the test.

4. Discuss any medications with your doctor: Certain medications may affect the test results. So, talk to your doctor about any medications you are taking.

5. Discuss any health conditions: Talk to your doctor about any health conditions you may have that could affect the test result.


The creatinine serum test is an essential diagnostic tool for assessing kidney function. It is a simple and non-invasive test that can provide valuable information about the patient’s health. Healthcare providers need to understand the significance of the test and the potential implications of abnormal results. It is essential to know the potential risks and benefits before undergoing it. Ultimately, the creatinine serum test is a valuable tool that can help healthcare providers diagnose kidney disease.

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