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Kidney/ Renal Function Test, Extended

What is Extended Kidney/Renal Function Test

Extended renal function tests are a series of blood and urine tests that are done to understand how well your kidneys are working to remove waste products from the body. This includes complete blood count, complete urine examination, and renal function tests.

Kidneys are an important organ serving several functions in the body. Kidneys remove waste products from the body, including drugs. They help balances the body fluids and help in regulating blood pressure. Kidneys promotes good health of bones by producing an active form of Vitamin D, and also control the production of red blood cells.

Symptoms of Kidney Dysfunction

This test is indicated if you experience the following symptoms:

Blood in the urine (hematuria)

Blood in the urine (hematuria)

Painful urination

Painful urination

Frequent urination

Frequent urination

Muscle cramps or pain

Muscle cramps or pain

Difficulty urinating

Difficulty urinating

Fatigue

Fatigue

Unexplained swelling in different body parts

Unexplained swelling in different body parts

Which tests are included in the Extended Kidney Function Test?

An extended kidney function test includes three tests. They are:

Compete Blood Count (CBC)

  • It is a blood test that looks at the overall health condition of an individual and helps in detecting a wide variety of medical conditions such as anemia, infection, and leukemia. It is taken to investigate the count of red blood cells, white blood cells, hemoglobin, platelets, and hematocrit, etc.

Complete Urine Examination (CUE)

  • It is a urine test that helps in detecting abnormal constituents of urine, if any. The results of this test may help detect a kidney dysfunction or infection. It is done to investigate parameters such as red blood cells, bilirubin, bacteria, pus cells, etc in the urine.

Kidney/Renal function test (RFT)

  • It comprises both, blood and urine test that measures how efficiently your kidneys are working. Most of these tests measure the glomerular filtration rate of the kidneys which gives an estimation of the efficiency of your kidneys in clearing waste from your body. It is done to investigate parameters such as proteins (albumins and globulins), blood urea nitrogen (BUN), calcium chloride, creatinine, potassium, sodium, urea, and uric acid, etc.

Who should get tested?

You may need this test if you are/ have:

Above 45 years of age

Above 45 years of age

Abnormal kidney structure

Abnormal kidney structure

Obese

Obese

Diabetes mellitus

Diabetes mellitus

Hypertension

Hypertension

Kidney stones

Kidney stones

Anaemia

Anaemia

Family history of kidney diseases

Family history of kidney diseases

Past history of kidney injury/diseases

Past history of kidney injury/diseases

Using medicines that affect kidney functioning

Using medicines that affect kidney functioning

Smoking

Smoking

Alcoholic

Alcoholic

Test preparation:

Two types of samples are required for an extended renal function test – A blood and urine sample.

Blood test: Your healthcare provider will collect a blood sample by inserting a small needle into a vein in your arm. A few mL of blood is collected in a sterile test tube. You should fast for at least 8 - 10 hours before taking this test.

Urine test: You will be given a clean and sterile container and instructed to collect your urine through a mid-stream method, i.e. after passing a small amount of urine, begin collecting urine into the container. Finish passing rest of the urine into the toilet after collecting the sample.

Please tell your healthcare provider if you are taking any medicines before taking the test.

Interpretation of the test results:

Complete Blood Count

Parameters

Normal ranges

Red Blood Cells (RBCs)

4.2 to 6.1 million cells/mcL

White Blood Cells (WBCs)

4,500 to 11,000 cells/mcL

Platelet

150,000 to 450,000/dL

Hemoglobin (Hb)

13.8 to 17.2 gm/dL (male)

12.1 to 15.1 gm/dL (female)

Hematocrit

40.7% to 50.3% (male)

36.1% to 44.3% (female)

Complete Urine Examination

Parameters

Normal ranges

White blood cells

<2-5 WBCs/hpf

Red blood cells

<2 RBCs/hpf

Bacteria/yeast/parasites

None

Casts

0-5 hyaline casts/lpf

Crystals

Occasionally

*HPF – High power field

*LPF – Low power field

Kidney (Renal) Function Test

Parameters

Normal levels

Estimated GFR (eGFR)

Greater than 90 mL/min/1.73 m2

Serum creatinine

0.6–1.1 mg/dL in women and

0.7–1.3 mg/dL in men

Blood urea nitrogen (BUN)

7–20 mg/dL

Microalbuminuria

Less than 30 mg

Albumin-Creatinine Ratio

Less than 30 mg per gram.

Creatinine clearance

88–128 mL/min for healthy women and

97–137 mL/min for healthy men.

Deviations from normal results:

Abnormalities in any of the included tests may be an indication of an underlying health problem or an issue affecting the kidneys.

  • Abnormal levels of hemoglobin, RBC count, or hematocrit may be an indication of anemia, heart disease, or iron deficiency.
  • High white blood cell count may be an indication of infection or inflammation in the body.
  • Presence of pus cells, RBCs, or WBCs in the urine may be an indication of urinary tract infections.
  • Abnormalities in the serum creatinine or proteins in the urine may be an early sign of kidney diseases.

FAQs

What is the turnaround time (TAT) for an extended kidney function test?

The test results of extended kidney function tests are usually available within 2 – 3 working days after the sample collection. However, it could take a little longer at times.

Are there any risks associated with extended kidney function tests?

No, there are no potential risks associated with extended kidney function blood tests. However, all blood tests involve negligible risks such as feeling a slight sting or bruise at the site of sample collection. It usually resolves within a few minutes to a couple of hours. Rarely, the site can become infected.

Urine tests does not have any associated risks. It is a painless and non-invasive method of sample collection.

My test results show pus cells in the urine. What does it mean?

The presence of pus cells in the urine is an indication of an underlying infection somewhere in your urinary tract such as a urinary tract infection (UTI). Symptoms of urinary tract infection include a burning sensation while urinating, urine with a strong smell, blood in urine, etc.

What precautions can be taken to maintain normal kidney functioning?

Lifestyle changes, including reducing the intake of red meat, increasing the intake of lean protein, staying hydrated, eating more fiber, etc., can be some precautionary measures to promote proper functioning of kidneys.

Are results from extended kidney function tests considered conclusive when they show the existence of UTI?

An extended kidney function test provides information on the presence or absence of bacteria, blood, or even glucose with respect to kidney function. To confirm the UTI, one is advised to undergo urine culture test, which helps in identifying the actual causative organism of the infection.

Related tests

Complete Blood Count (CBC)

₹ 280
  • Includes

    1 Test Parameter(s)

  • Complete blood count (CBC) is a type of blood test that helps determine an individual's overall health. This test evaluates red blood cells that carry oxygen from the lungs to the rest of the body and white blood cells , which fight infections and other diseases. There are five major types of white blood cells, and the CBC test measures the total number of white cells in the blood.CBC test includes an absolute and differential count of basophil, eosinophil, lymphocyte, monocyte, and neutrophil that measures the levels of these cells in the blood. CBC also measures the levels of platelets, which help prevent and stop bleeding. Hemoglobin is a protein in red blood cells, and the Mean corpuscular hemoglobin (MCH) test measures the average amount of hemoglobin in each red blood cell, mean corpuscular hemoglobin concentration (MCHC) test determines the average concentration of hemoglobin in a single red blood cell (RBC). Hematocrit/ Packed Cell Volume (PCV) measures the proportion of red blood cells, and red cell distribution width (RDW) evaluates the differences in the volume and size of your red blood cells. Mean corpuscular volume (MCV) measures the average size of the red blood cells. Complete blood counts can help detect various disorders, including infections, anemia, and diseases affecting blood components.

Complete Urine Examination

₹ 100
  • Includes

    1 Test Parameter(s)

  • Complete urine examination or complete urine test includes a physical, chemical, and microscopic examination of urine. Urine color and transparency are assessed during a physical exam. A chemical examination checks blood, bilirubin, ketones, and urine glucose levels. While microscopic examination helps detect pus cells, RBCs, bacteria, and other cells. Urine complete analysis tests help diagnose conditions like kidney diseases, urinary tract infections, and other metabolic disorders.

Kidney/Renal Function Tests Gold (KFT Gold /RFT Gold)

₹ 750
  • Includes

    1 Test Parameter(s)

  • A kidney function test (KFT), also known as the Renal function test (RFT), includes an evaluation of blood to determine the overall health of the kidney and its function. The KFT test measures the parameters like urea, creatinine, uric acid, protein, and electrolytes. Doctors may recommend a kidney test or RFT test in the presence of symptoms related to kidney problems such as an urge to urinate frequently, difficulty during urination, blood in urine, swelling in the feet, or urinating too much or too little. Impaired kidney functions may indicate the presence of conditions like diabetes or high blood pressure.

Kidney/Renal Function Tests (KFT/RFT), Platinum

₹ 1,800
  • Includes

    3 Test Parameter(s)

  • A kidney/renal function test (KFT/RFT)extended is a group of tests used to determine the condition and function of the kidneys. Kidneys help eliminate waste from our bodies. They also help regulate pH levels by regulating the levels of electrolytes in the body. If the kidneys are not functioning appropriately, the waste products will build up and harm the body. The group of tests include: Complete blood count (CBC) test is used to assess your general health and can help detect various diseases such as anemia and infections. A complete urine examination test is used to check urine components that can assist in identifying many health issues in the body. A full urine test is performed to check for residual blood cells, bilirubin, germs, and pus cells. Abnormalities in the presence of all these in the complete urine examination may indicate a kidney dysfunction or infection. KFT/RFT test includes an albumin/globulin (A/G) ratio test that measures the total amount of protein in your blood. There are two major types of protein in the blood: albumin and globulin, and their ratio will help to determine renal functioning. Blood urea nitrogen and creatinine, calcium, chloride, creatinine, potassium, sodium, urea, and uric Acid tests are conducted to examine how well the kidneys work. A KFT/RFT extended helps assess the kidneys' overall health and kidney function. People with diabetes, heart disease, high blood pressure, and a family history of renal disease are recommended to undergo this test.

Albumin : Globulin Ratio (A:G Ratio)

₹ 200
  • Includes

    1 Test Parameter(s)

  • Albumin and globulin are two types of proteins found in the human body. Albumin transports drugs and hormones throughout the body. It also helps in the growth and healing of tissues. Globulin is a group of proteins, some of which are produced by the liver and our immune system. They help to fight against infection and the transfer of nutrients. The A:G Ratio test also compares the amount of albumin in your blood to the amount of globulin. The comparison is called the albumin/globulin (A/G) ratio. Lower levels of the A/G ratio may be caused by an autoimmune disease, such as lupus, liver, or kidney disease. On the other hand, a high A/G ratio may be caused by genetic disorders or leukemia.

Electrolytes, Serum

₹ 400
  • Includes

    1 Test Parameter(s)

  • Electrolytes like sodium, potassium, and chloride are essential to maintain water and pH balance in the body. A serum electrolyte test includes a set of tests that help to identify electrolyte imbalances in the body. Malnutrition is one of the key reason for serum electrolyte panel testing.The serum electrolyte tests are indicated in patients experiencing abnormal heartbeat or muscle weakness. It is also done to evaluate and monitor hypertension and kidney disease conditions.

Serum Protein Electrophoresis (SPE)

₹ 850
  • Includes

    1 Test Parameter(s)

Tests At Lupin Diagnostics

Complete Blood Count (CBC)

₹ 280
  • Includes

    1 Test Parameter(s)

  • Complete blood count (CBC) is a type of blood test that helps determine an individual's overall health. This test evaluates red blood cells that carry oxygen from the lungs to the rest of the body and white blood cells , which fight infections and other diseases. There are five major types of white blood cells, and the CBC test measures the total number of white cells in the blood.CBC test includes an absolute and differential count of basophil, eosinophil, lymphocyte, monocyte, and neutrophil that measures the levels of these cells in the blood. CBC also measures the levels of platelets, which help prevent and stop bleeding. Hemoglobin is a protein in red blood cells, and the Mean corpuscular hemoglobin (MCH) test measures the average amount of hemoglobin in each red blood cell, mean corpuscular hemoglobin concentration (MCHC) test determines the average concentration of hemoglobin in a single red blood cell (RBC). Hematocrit/ Packed Cell Volume (PCV) measures the proportion of red blood cells, and red cell distribution width (RDW) evaluates the differences in the volume and size of your red blood cells. Mean corpuscular volume (MCV) measures the average size of the red blood cells. Complete blood counts can help detect various disorders, including infections, anemia, and diseases affecting blood components.

Complete Urine Examination

₹ 100
  • Includes

    1 Test Parameter(s)

  • Complete urine examination or complete urine test includes a physical, chemical, and microscopic examination of urine. Urine color and transparency are assessed during a physical exam. A chemical examination checks blood, bilirubin, ketones, and urine glucose levels. While microscopic examination helps detect pus cells, RBCs, bacteria, and other cells. Urine complete analysis tests help diagnose conditions like kidney diseases, urinary tract infections, and other metabolic disorders.

Kidney/Renal Function Tests Gold (KFT Gold /RFT Gold)

₹ 750
  • Includes

    1 Test Parameter(s)

  • A kidney function test (KFT), also known as the Renal function test (RFT), includes an evaluation of blood to determine the overall health of the kidney and its function. The KFT test measures the parameters like urea, creatinine, uric acid, protein, and electrolytes. Doctors may recommend a kidney test or RFT test in the presence of symptoms related to kidney problems such as an urge to urinate frequently, difficulty during urination, blood in urine, swelling in the feet, or urinating too much or too little. Impaired kidney functions may indicate the presence of conditions like diabetes or high blood pressure.

Kidney/Renal Function Tests (KFT/RFT), Platinum

₹ 1,800
  • Includes

    3 Test Parameter(s)

  • A kidney/renal function test (KFT/RFT)extended is a group of tests used to determine the condition and function of the kidneys. Kidneys help eliminate waste from our bodies. They also help regulate pH levels by regulating the levels of electrolytes in the body. If the kidneys are not functioning appropriately, the waste products will build up and harm the body. The group of tests include: Complete blood count (CBC) test is used to assess your general health and can help detect various diseases such as anemia and infections. A complete urine examination test is used to check urine components that can assist in identifying many health issues in the body. A full urine test is performed to check for residual blood cells, bilirubin, germs, and pus cells. Abnormalities in the presence of all these in the complete urine examination may indicate a kidney dysfunction or infection. KFT/RFT test includes an albumin/globulin (A/G) ratio test that measures the total amount of protein in your blood. There are two major types of protein in the blood: albumin and globulin, and their ratio will help to determine renal functioning. Blood urea nitrogen and creatinine, calcium, chloride, creatinine, potassium, sodium, urea, and uric Acid tests are conducted to examine how well the kidneys work. A KFT/RFT extended helps assess the kidneys' overall health and kidney function. People with diabetes, heart disease, high blood pressure, and a family history of renal disease are recommended to undergo this test.

Albumin : Globulin Ratio (A:G Ratio)

₹ 200
  • Includes

    1 Test Parameter(s)

  • Albumin and globulin are two types of proteins found in the human body. Albumin transports drugs and hormones throughout the body. It also helps in the growth and healing of tissues. Globulin is a group of proteins, some of which are produced by the liver and our immune system. They help to fight against infection and the transfer of nutrients. The A:G Ratio test also compares the amount of albumin in your blood to the amount of globulin. The comparison is called the albumin/globulin (A/G) ratio. Lower levels of the A/G ratio may be caused by an autoimmune disease, such as lupus, liver, or kidney disease. On the other hand, a high A/G ratio may be caused by genetic disorders or leukemia.

Electrolytes, Serum

₹ 400
  • Includes

    1 Test Parameter(s)

  • Electrolytes like sodium, potassium, and chloride are essential to maintain water and pH balance in the body. A serum electrolyte test includes a set of tests that help to identify electrolyte imbalances in the body. Malnutrition is one of the key reason for serum electrolyte panel testing.The serum electrolyte tests are indicated in patients experiencing abnormal heartbeat or muscle weakness. It is also done to evaluate and monitor hypertension and kidney disease conditions.

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