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What Is Blood Smear Test?

A blood smear test is performed to check for abnormalities in various blood cells. The blood smear test embraces customers with information on the number and shape of these cells. Thus, based on this peripheral blood smear test, your doctor can diagnose certain blood disorders and abnormalities. In this smear test, your blood sample is tested on a specially treated slide. An expert healthcare professional examines the slide under a microscope and checks the size, shape, and number of different types of blood cells. These cells could be:

  • Red Blood Cells: They carry oxygen from your lungs to the rest of your body
  • White Blood Cells: prevent infection
  • Platelets: help your blood clot

 

For a blood smear test, a deft lab professional checks for blood cell problems that may not be visible on computer analysis.

Blood Smear Test

The cost of the blood smear test is Rs. 220 to Rs.450, depending on your location and place.

Please check the price of the blood smear test in Delhi/NCR, your nearby centers and other details.

Test Summary

Also known as peripheral smear, peripheral blood film, smear, blood film, manual differential, differential slide, blood cell morphology, blood smear analysis
Test Type Blood
Blood smear test includes To check blood disorders
Preparation You may not need any special preparations.
Reporting Within 24 hours
Test price The cost of the blood smear test is Rs. 220 to Rs.450, depending on your location and place.
Also included in Health Insurance Plans
Related tests CBC

 

Why do you need this test?

Your doctor may refer to this test if you have abnormal results on a complete blood count (CBC). A CBC test measures various parts of your blood. Your doctor may suggest this test if you have symptoms of a blood disorder. These symptoms could be,

  • Fatigue
  • Jaundice (a healthcare condition where your skin and eyes turn yellow)
  • Abnormal bruise
  • Unexplained weight loss
  • Skin rashes or cuts
  • Bone pain
  • Severe infection
  • Unexplained anemia

 

Your doctor may suggest this test if you have been exposed to or have traveled to a developing country. Your healthcare giver may order this test if you have a disease caused by a parasite, such as malaria.

The Preparation for the Test

You may not require any special preparation for this blood smear test. But if your doctor suggests other blood tests, you may need to fast for several hours before the test. Your doctor will guide you regarding the special instructions for the test.

The Blood Film Test Procedure

  • Once you reach the lab, an experienced nurse or technician will check your arms to get easy access to your vein.
  • After the identification of the vein, he will clean and disinfect the area by using an antiseptic
  • He will insert a needle into your vein to collect your blood sample
  • A small amount of blood will be collected into a test tube
  • When the sample collection will be finished, he will remove the needle and place a bandage over the site.
  • The entire procedure gets completed within five minutes.

 

The Interpretation of the Result

You may get the results on the same day or the next day. The results will reveal whether your blood cells look normal or abnormal. You will receive separate results for red blood cells, white blood cells, and platelets.

If your red blood cell results are not normal, it may indicate

  • Anemia
  • Sickle-cell Anemia
  • Hemolytic anemia (a type of anemia where red blood cells are destroyed before they can be replaced, as a result, your body may not have adequate healthy red blood cells)
  • Thalassemia
  • Bone marrow disorders

 

If your white blood cell results are not normal, it may indicate

  • Infection
  • Allergies
  • Leukemia

 

If your platelet results are not normal, it may indicate

Thrombocytopenia (a healthcare condition where your blood has a lower than the normal number of platelets)

Talk to your health care provider to learn more about your results.

FAQs

What are the risks of this test?

Though risks are minimal, they depend on person to person. You may experience the following symptoms during the blood test.

      1. Fainting
      2. Dizziness
      3. Excessive bleeding
      4. Several punctures to locate veins
      5. Blood clotting under the skin
      6. Local infection

If my blood smear shows abnormal results, what additional testing do I need to perform?

If your test results were abnormal, then your healthcare provider may recommend the following tests. Iron Tests

      1. Vitamin B 12 and folate tests
      2. Flow cytometry immunophenotyping
      3. Bone marrow aspiration and biopsy
      4. BCR-ABL1
      5. Hemoglobinopathy evaluation

What are the precautions for preparing a blood smear?

The below-mentioned precautions should be taken.      

      1. The angle must be maintained at 45°.
      2. The blood drop should be of the proper size
      3. The spreader's edges should be smooth and smaller than the slide on which the smear is being made
      4. Proper pressure needed to be applied
      5. A drop should be pulled with a spreader (don’t push it)

How long does a blood smear take to dry?

The risks are more if the smear is made with anticoagulated blood. At room temperature, drying may take several; 30 minutes is the minimum. By using a fan or hairdryer; you may speed up the drying process.

What are the features of a good smear?

The classic blood smear has a thumbprint appearance
     
1. A well-developed feathered edge will be prominent
      2. The dense body of the smear usually covers the most of the slide
      3. A thing counting area is there that blends with the feathered edge and the dense body

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