Hematologist
CION Cancer Clinics
Pre-transfusion haemoglobin targets in thalassaemia | CION Cancer Clinics
For most people with thalassaemia major, the haemoglobin measured just before each transfusion should sit at 9.5 to 10.5, measured in g/dL. That range keeps the body's own faulty red cell production quiet while adding as little iron as possible. This page explains why, what a low or high result means, who may have a different target, and what the number cannot tell you. At CION Cancer Clinics, our haematologist cares for anaemia, bleeding, clotting and inherited blood disorders, with ArogyaSri, CGHS and cashless insurance accepted.
BP
Medically reviewed by Dr. Basudev PokhrelConsultant Haematologist · last reviewed September 2026, next review due September 2027
17+specialists on panel
15,000+patients treated
35+centres across Telangana & AP
4.8★ / 800+Google rating
On this page
- What should haemoglobin be just before a transfusion?
- What does it mean if the number is below or above the target?
- How is the number used at each visit?
- Which words on the transfusion record matter?
- What do families often get wrong about the target?
- When is the target different, and what can the number not tell you?
- Common questions about pre-transfusion haemoglobin
The short answer
What should haemoglobin be just before a transfusion?
For most people with thalassaemia major, the aim is a haemoglobin of 9.5 to 10.5, measured in g/dL, on the blood test taken just before each transfusion. That is the level international thalassaemia guidelines use as the usual target, and your haematologist sets the schedule to keep you there.
Why this number and not a normal one
A healthy adult usually has a higher haemoglobin than this. The target is lower on purpose. It is high enough to stop the body making large amounts of its own faulty red cells, which is what enlarges the spleen, widens the bones of the face and slows growth in children. It is low enough to avoid giving more blood than is needed, because every unit of blood adds iron that the body cannot remove on its own.
What the number is really measuring
The pre-transfusion value is the lowest point in your cycle. After a transfusion the haemoglobin rises, then falls steadily over the following weeks until the next one. Checking it at the lowest point shows whether the gap between transfusions and the amount given are right for you.
Reference ranges differ slightly between laboratories. One result is always read alongside how the person feels, their growth and the earlier results in the notebook.Reading the result
What does it mean if the number is below or above the target?
Neither result is a reason to change anything on your own. Each one is a question for the team at the next visit.
Below the target, again and again
If the pre-transfusion haemoglobin keeps landing under the range, the bone marrow starts working overtime to make up the gap. Over months that can mean a growing spleen, poor growth and tiredness at school or work.
The team may look at
- Shortening the gap between transfusions
- The amount of blood given for the current weight
- Whether the spleen is using up blood faster
Within the target
This is what the schedule is built to achieve. It usually means the amount and timing of blood suit your present weight and needs. The team still checks growth, iron levels and the spleen, because a good number today does not show everything.
Above the target
A higher number can feel reassuring, but it often means more blood is being given than is needed. More blood brings more iron, which can harm the heart and liver over years.
The team may stretch the gap slightly rather than cut the amount. That is their decision, not one to make at home.Not sure whether this applies to you?
Ask an oncologist
!
Do not wait for the next transfusion date if
The person is breathless at rest, has chest pain or a racing heart, faints, looks much paler or yellower than usual, or has a high fever, especially after the spleen has been removed. Go to the nearest emergency department the same day, or call 108. Tell them the person has thalassaemia and is on regular transfusions, and carry the transfusion notebook with you.
On transfusion day
How is the number used at each visit?
-
The blood test comes first
A sample is taken before any blood is given. This is the pre-transfusion haemoglobin. It is also used to match the donor blood, so a fresh sample is usually needed each time.
-
The result is compared with the last few
One value on its own says little. The team looks at the trend in your notebook: is it steady, slowly slipping, or creeping up? A trend tells them far more than a single reading.
-
The amount of blood is worked out
The volume given depends mainly on body weight and on the gap before the next visit. Children need the amount reviewed often, because they keep growing.
-
The transfusion is given and watched
Nurses check temperature, pulse and breathing through the transfusion. Tell them at once about itching, shivering, back pain or feeling unwell.
-
Everything is written down
The haemoglobin, the date, the units given and any reaction all go into the record. Over a year this shows how much blood you needed in total, which guides iron removal treatment.
Leave a number, we will call you
One field. No form to fill in, and no charge for the call.
On your report
Which words on the transfusion record matter?
- Hb or haemoglobin
- The protein in red cells that carries oxygen. Low haemoglobin is called anaemia, which simply means too little of it in the blood.
- g/dL
- Grams per decilitre, the unit most Indian laboratories use for haemoglobin. Check the unit if a report comes from another laboratory.
- Pre-transfusion Hb
- The haemoglobin measured just before a transfusion. This is the number the target refers to.
- Post-transfusion Hb
- The value after the transfusion. It is checked sometimes, not always, to make sure the level has not been pushed too high.
- Serum ferritin
- A blood test that gives a rough idea of how much iron the body is storing. It rises as transfusions add iron.
Commonly believed
What do families often get wrong about the target?
"The higher the haemoglobin, the better my child will do."
Only up to a point. Pushing the level well above the target means more blood, and more blood means more iron. The range is chosen to balance growth and energy against the harm that stored iron does to the heart and liver over years.
"If she feels fine, we can skip or delay this transfusion."
Feeling well is often the result of keeping to the schedule. Delays let the haemoglobin fall below the range, and the effects on the spleen, bones and growth build slowly without warning. Any change to the dates is for the haematologist to decide.
"Eating iron-rich food or taking iron tablets will raise the number."
The low haemoglobin in thalassaemia major is not caused by a shortage of iron. Most people on regular transfusions already have too much iron. Never start iron tablets or tonics unless the treating team has asked for them.
"A number from any laboratory can be compared with the last one."
Machines and methods differ, so small changes between laboratories may mean nothing. Where you can, have the test done in the same place, and bring every report to the visit so the team can read them together.
Being straight with you
When is the target different, and what can the number not tell you?
The usual range is a starting point, not a rule that fits everyone. Your haematologist may aim a little higher or lower, and there is usually a reason written in the notes.
People for whom the target may be set differently
Someone whose heart has already been affected by iron, or who has heart failure, may be kept at a somewhat higher level to ease the load on the heart. Someone with thalassaemia intermedia, a milder form, may not need regular transfusions at all, and is given blood only at certain times, such as during an infection, pregnancy or a growth spurt.
What the number cannot show
A good pre-transfusion haemoglobin does not tell you how much iron is stored in the heart or liver. That needs ferritin tests and, from time to time, a special MRI scan. It does not measure growth, puberty or bone health either, which are checked separately. It also says nothing about the long-term outlook, which depends on many things together and is best discussed with your own haematologist.
What to ask at the next visit
Ask what target has been set for you and why, and when iron levels were last checked. Dr. Basudev Pokhrel and CION's haematology team can go through the notebook with you.
Questions we are asked
Common questions about pre-transfusion haemoglobin
My child's haemoglobin was a little under the target. Is that dangerous?
One slightly low reading is common and usually not an emergency on its own. What matters is the pattern over several visits and how your child is feeling and growing. If the readings keep coming in low, the team will look at the gap and the amount of blood. Seek same-day care for breathlessness, chest pain or fainting.
Can we bring the next transfusion forward because the number is low?
Talk to the treating team first rather than deciding at home. They may well move the date, but they will want to know the full picture, including any fever or infection, before changing the schedule. Changes made without them can push the level too high or leave a gap in the record.
Why does the target look lower than a normal haemoglobin?
Because the aim is not to make the count normal. It is to keep it high enough to quieten the body's own faulty red cell production, while giving as little blood, and so as little iron, as possible. The range is a balance between those two goals.
We need more blood each year to reach the same number. Why?
Growth accounts for some of it. A larger spleen can also use up transfused cells faster, and some people form antibodies against donor blood over time. The team compares your yearly blood use with your weight to see whether the spleen or another cause needs looking into.
Is a higher haemoglobin better before exams or a wedding?
It is understandable to want extra energy for a big event. Ask the team whether the date of the next transfusion can be planned around it, which is often possible. Raising the level beyond the usual target adds iron, so it is a decision for the haematologist rather than something to request at the blood bank.
Does the target change as my child grows?
The range usually stays much the same through childhood and adult life. What changes is the amount of blood needed to reach it, because that depends on body weight. Heart problems or pregnancy can lead the team to set a different level.
Does the target apply to thalassaemia trait?
No. People with thalassaemia trait carry one changed gene, usually have a mildly low or normal haemoglobin, and do not need transfusions. Their haemoglobin is often mistaken for iron deficiency, so iron tablets are sometimes given without need. Ask for the result to be checked before starting any.
Can CION look at our transfusion records?
Yes. Bring the transfusion notebook, recent haemoglobin and ferritin reports and any scan results. CION's haematology team will review the pattern, explain what the numbers show, and tell you what to ask your transfusion centre. Where care elsewhere is needed, the team helps coordinate it.
Your Haematologist
Meet CION's haematologist. One specialist for your blood report and your plan.
Dr. Basudev Pokhrel reviews blood counts, transfusion needs and blood disorders, and works with the CION tumour board on blood cancers.
Want a specific doctor for your case? Mention them when booking.
Book Free ConsultationBook an appointment with our specialist
Share your name and number — we'll call you back within 30 minutes to schedule your consultation.
Sources
- Thalassaemia International Federation — Guidelines for the Management of Transfusion Dependent Thalassaemia
- NHS — Thalassaemia: treatment
- National Heart, Lung, and Blood Institute — Thalassemia
- American Society of Hematology — Thalassemia
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
Regular Transfusions in Thalassaemia: The ScheduleHow often blood is given and what sets the gapFerritin Targets and Monitoring in ThalassaemiaThe other number on every transfusion recordIron Overload in ThalassaemiaWhy more blood than needed carries a costThalassaemia Major: The Treatment PathThe whole of lifelong care in one placeThalassaemiaThe full thalassaemia guide
Talk to us
Want the transfusion numbers explained?
Share the transfusion notebook and recent reports. CION's haematology team will go through the pattern with you and explain the next step.