Peripheral blood smear Lab Test

Red blood cell morphology
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Clinical Definition of Peripheral blood smear

A procedure in which a sample of blood is viewed under a microscope to count different circulating blood cells (red blood cells, white blood cells, platelets, etc.) and see whether the cells look normal. It evaluates the white blood cells (WBCs, leukocytes), red blood cells (RBCs, erythrocytes) and platelets (thrombocytes). Blood smear is examined to investigate hematological problems (disorders of the blood) and, occasionally, to look for parasites within the blood such as malaria and filaria.

 

When do you expect results?

24 to 36 Hours

Why Get Tested?

 

A blood smear reveals information about the number and shape of blood cells in the body. Peripheral blood smear test is ordered as part of a general health exam to help diagnose many illnesses

It helps diagnose if red blood cells, white blood cells and platelets are normal in appearance and number
It distinguishes between the various kinds of white blood cells
Helps determine their relative percentages in the blood
It also helps diagnose a range of deficiencies, diseases and during chemo/radiation therapy
In the evaluation for hemoglobin variants
Determines presence of Malaria / Filaria

 

Reason to take Peripheral blood smear Test

 

Common signs are: 

A general feeling of tiredness or weakness
Lack of energy
Frequent infections
Fatigue
Bone and joint pain
Excessive bleeding and bruising
Fever
Weakness
Fatigue
Weight loss
Swollen lymph nodes, liver, spleen, kidneys, and testicles
Frequent infections
Headaches
Vomiting
Confusion
Seizures (may occur when cells are increased in the brain or central nervous system)
Night sweat

 

Preparations Needed for Peripheral blood smear Test

 

No Fasting Required.

No other special preparations required

 

Sample Required?

 

Specimen type :Serum(Blood Sample), Specimen collection procedure:Venipuncture

(Collection of blood from a vein, usually from the arm)

 

Understanding results of Peripheral blood smear

Reference RangeInterpretation
ParasitesNegative
HemoglobinSee Individual test
WBCSee Individual test
RBCSee Individual test
Differential countSee Individual test
pHs7.35- 7.45

 

‘*A Reference range is a set of values which helps the healthcare professional to interpret a medical test. It may vary with age, gender, and other factors. Reference ranges may also vary between labs, in value & units depending on instruments used and method of establishment of reference ranges’

 

References

  1. https://medlineplus.gov/labtests/bloodsmear.html
  2. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4415389/
  3. https://labtestsonline.org/tests/blood-smear