CBC Hemogram Test: What It Measures and Why It Matters
                     CBC Hemogram Test: What It Measures and Why It Matters
A blood test is a powerful way to evaluate overall health and to find a wide range of 
conditions,  including  anemia,  infection  and  leukemia.  CBC hemogram test is  a 
commonly prescribed test which examines different components of blood and can 
help doctors identify or monitor a range of health conditions.
What is a hemogram test?
A complete  hemogram test  is  a  group of  blood tests  that  looks at  the levels  and 
characteristics of different  blood cells.  It  measures red blood cells  (RBCs),  white 
blood cells (WBCs), platelets and haemoglobin, along with other related parameters.
The results can provide useful clues about conditions such as anaemia, infections and 
certain blood disorders, while also helping doctors assess overall health. To know 
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What does a hemogram measure?
A hemogram examines several important components of blood:
• Red Blood Cells (RBCs): These cells carry oxygen from the lungs to different 
parts of the body. Their normal levels can vary depending on factors such as 
age and sex.
• White  Blood  Cells  (WBCs): WBCs  help  the  body  fight  infections.  Their 
levels can change due to infections, medications and certain health conditions.
• Platelets: Platelets play an important role in blood clotting. The usual platelet 
count is around 150,000–450,000 per microlitre of blood.
• Haemoglobin: This iron-containing protein in RBCs binds with oxygen and 
helps transport it throughout the body.
• ESR: The erythrocyte sedimentation rate measures how quickly RBCs settle in 
a blood sample over a specific period. It can provide information that may be 
useful when assessing inflammation.
• Haematocrit: This indicates the proportion of RBCs in relation to the total 
volume of blood.
Hemogram vs CBC: Are they the same?
A Complete  Blood  Count  (CBC)  and  a  hemogram  are  often  considered  similar 
because both assess blood cell counts. However, a complete hemogram may include 
additional parameters such as ESR and peripheral smear, depending on the laboratory 
and test panel.
A peripheral  smear  involves  examining  blood  cells  under  a  microscope  and  can 
provide additional information about their appearance and characteristics.
Why is a hemogram done?
A doctor may recommend a hemogram for several reasons, including:
• Routine health assessment 
• Investigating symptoms
• Identifying abnormalities in blood cells
• Monitoring certain health conditions
• Assessing response to treatment
What can abnormal results mean?
Changes  in  RBC,  haemoglobin  or  haematocrit  levels  may  be  associated  with 
conditions such as anaemia, iron deficiency or dehydration. Abnormal WBC levels 
may  occur  with  infections,  medication  effects,  autoimmune  conditions  or  bone 
marrow  disorders.  ESR  levels  can  also  change  with  inflammation  and  certain 
illnesses.
However, an abnormal result does not necessarily mean that a person has a serious 
disease.  Factors  such  as  medication,  physical  activity,  diet  and  menstruation  can 
influence some blood parameters. Test results should therefore be interpreted by a 
doctor along with symptoms, medical history and other findings.
Is any preparation needed?
A hemogram generally does not require special preparation. However, it is advisable 
to inform your doctor about any medicines you take and any existing health concerns. 
Your doctor can let you know if any specific preparation is required before the test.
FAQ
1. Is a hemogram the same as a CBC?
They are often similar, but a hemogram may include additional tests such as ESR and 
peripheral smear.
2. Can a hemogram detect anaemia?
Yes, it can help identify blood changes associated with anaemia.
3. Do I need to fast for a hemogram?
Generally, no special preparation is required.