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CION Cancer Clinics
Blood transfusion during cancer surgery | CION Cancer Clinics
Most people having cancer surgery do not need a blood transfusion, but some do. Larger operations, those near big blood vessels, and a low blood count before surgery all make it more likely. Blood is matched and kept ready in case, and goes back to the bank if it is not used. This page explains why blood may be given, how it is arranged, and what you can ask or refuse. CION Cancer Clinics’ surgical oncologists in Hyderabad can talk this through with you.
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Medically reviewed by Dr. Muralidhar MuddusettyConsultant Surgical Oncologist · MBBS (AIIMS), MS (Surgery, AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh) · last reviewed September 2026, next review due September 2027
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On this page
- Will you need a blood transfusion during cancer surgery?
- Why might blood be given during or after the operation?
- How is blood arranged before your operation?
- What do families often worry about with transfusion?
- What if you have concerns about receiving blood?
- What do the blood bank words mean?
- Common questions about blood transfusion during surgery
The short answer
Will you need a blood transfusion during cancer surgery?
Most people having cancer surgery do not need a blood transfusion, but some do, and the team gets blood ready in case. Whether you need it depends on the size of the operation, where it is, how much blood is lost and what your blood count was before surgery.
Why blood is arranged even if it is not used
Before a larger operation, the laboratory checks your blood group and matches units from the blood bank against your sample. That blood is kept ready. If the operation goes smoothly, it goes back to the bank for someone else. Arranging it does not mean the team expects heavy bleeding.
Which operations are more likely to need it
Operations on the liver, pancreas, food pipe, bladder, pelvis and large bone or soft tissue tumours are more likely to involve blood loss. So are operations where the tumour sits close to large blood vessels. Smaller operations, such as removing a breast lump or a skin cancer, rarely need blood.
Your blood count before surgery matters
Cancer itself, bleeding from a tumour or earlier chemotherapy can leave your haemoglobin low before you even reach theatre. The lower it starts, the more likely a transfusion becomes. Your team may treat a low haemoglobin in the weeks before surgery, often with iron given by mouth or into a vein.
Never start, stop or change an iron tablet or any other medicine on your own. Ask the doctor who prescribed it.The reasons
Why might blood be given during or after the operation?
A transfusion replaces what the body cannot make up quickly enough. These are the usual situations.
Blood lost in theatre
The anaesthetist watches blood loss, blood pressure and blood tests throughout. If loss is heavy, red cells are given to keep oxygen reaching the heart and brain.
A low count before surgery
If haemoglobin was low to begin with, even ordinary blood loss may push it too low for safe recovery.
Blood that is not clotting well
Sometimes the problem is clotting, not the amount lost. Plasma or platelets may be given instead of, or as well as, red cells.
More likely with
- Liver disease
- Blood-thinning medicines
- A low platelet count after chemotherapy
Bleeding in the days after
Occasionally bleeding shows up after the operation, in a drain or on a blood test, and blood is given on the ward or in intensive care.
Not sure whether this applies to you?
Ask an oncologistBefore the day
How is blood arranged before your operation?
A blood sample is taken
Usually a day or so before surgery, a sample checks your blood group and looks for antibodies that could react with donor blood.
Units are matched
The blood bank matches units against your sample and keeps them reserved for you. This is called cross-matching.
The family may be asked for donors
Many blood banks in India ask relatives or friends to donate to replace what is used. The blood they give usually goes into the general stock, not directly to the patient.
Consent is taken
You are told why blood may be needed, what the risks are and what the alternatives are, and asked to agree before surgery.
Commonly believed
What do families often worry about with transfusion?
"Blood from a relative is safer than blood from the bank."
Not necessarily. Bank blood is screened in the same way, and blood from close relatives carries a rare risk of its own. That is why donated family blood usually goes into general stock.
"A transfusion will give the patient an infection like HIV."
Donated blood in licensed blood banks is tested for HIV, hepatitis B and C, syphilis and malaria. The risk is now very small. Ask your team if you want it explained.
"Needing blood means the operation went badly."
Blood is often given simply because the operation was a large one, or the count was low before it began. It is a routine part of some cancer operations.
"Eating certain foods after surgery will replace the blood."
Good food helps recovery, but no food can quickly raise a dangerously low haemoglobin. When a count is very low, a transfusion is what works in time.
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Tell the nurse straight away
If the patient becomes shivery, feverish, breathless, develops an itchy rash, chest or back pain, or feels suddenly unwell while blood is running or soon after, press the call bell and tell the nurse at once. Do not wait to see if it settles, and do not adjust the drip yourself. Reactions are uncommon and are usually handled quickly when caught early.
Your choices
What if you have concerns about receiving blood?
You can refuse a blood transfusion. The team must respect that decision, but they will need to know about it well before surgery, because it can change whether an operation is safe to do and how it is planned.
If your beliefs rule out blood
Some people, including many Jehovah's Witnesses, do not accept blood. Tell your surgeon and anaesthetist at the first visit. They may treat low haemoglobin earlier, use careful techniques to reduce bleeding and write down exactly which blood products you will and will not accept. Some operations may not be suitable without the option of blood, and your team should tell you that plainly.
Ways to reduce the need for blood
Correcting a low count before surgery, managing blood-thinning medicines with your doctors, and careful surgical technique all help. Some centres can collect and return your own blood lost during surgery. Whether that suits your operation is a question to ask your centre.
What this page cannot tell you
It cannot tell you whether you will need blood. Ask your surgeon how likely it is in your own operation, and how much has been arranged.
In plain language
What do the blood bank words mean?
- Haemoglobin
- The part of red blood cells that carries oxygen. Shown as Hb on blood reports.
- Group and cross-match
- Checking your blood group and testing donor units against your sample so they are safe for you.
- PRBC or packed red cells
- Red blood cells with most of the fluid removed. The usual unit given for blood loss.
- FFP
- Fresh frozen plasma, the liquid part of blood, given to help clotting.
- Replacement donor
- A relative or friend who donates to replace the units the patient used.
Questions we are asked
Common questions about blood transfusion during surgery
How do we know if blood was given during the operation?
The surgeon or anaesthetist usually mentions it at the update, and it is written in the operation and anaesthesia notes. If nobody mentions it and you want to know, ask. It is a normal question, and the answer also helps explain how the patient may feel in the first days.
How many donors will the family need to bring?
It varies with the operation and with each blood bank's own policy. The blood bank or the ward will tell you what they need and by when. If you cannot find donors, tell the team early. Blood for a patient who needs it should not be held back because the family could not arrange donors.
Is there a charge for the blood?
Blood itself is not sold, but blood banks charge processing and testing fees for each unit. Whether these are covered depends on your package and on Aarogyasri, CGHS, ECHS, EHS or cashless insurance. Ask the billing desk before admission.
Can the patient's own family member's blood go directly to them?
Usually it is not recommended. Blood from close relatives carries a rare but serious risk, and the blood bank will explain its rules. Family donations normally replace the stock that the patient used instead.
Will a transfusion affect the cancer or the treatment after surgery?
Researchers have studied whether transfusion around surgery affects cancer outcomes, and the findings are mixed. This is one reason teams try to avoid blood that is not needed. When blood is needed to keep someone safe, the benefit is clear. Ask your oncologist if you want to understand this for your own cancer.
How will the patient feel after receiving blood?
Most people notice nothing during the transfusion. Afterwards, some feel less tired and breathless as their count improves. Any fever, shivering, rash or breathlessness during or soon after should be reported to the nurse straight away.
The patient is on a blood thinner. What should we do?
Tell the surgeon and anaesthetist at the first visit, and bring the actual medicine strips. They will decide whether and when it should be paused, and whether another medicine is needed in the meantime. Do not stop it on your own, because stopping suddenly can also be dangerous.
Can we refuse blood on the day if we change our minds?
Consent can be withdrawn, but deciding this on the day of surgery puts the team in a very difficult position. If you have doubts, raise them at the consent meeting so the surgeon can explain the risks and alternatives and plan around your wishes.
Meet the Specialists
17+ senior cancer specialists. One panel for your case.
Trained at AIIMS, Tata Memorial, and leading international centres. Combined 150+ years of experience. Every complex case is reviewed by 3+ of them — together.
Medical Oncologist
Dr. C. Raghavendra Reddy
MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)
Medical Oncologist
Dr. Bharati Devi Gorantla
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
Medical Oncologist
Dr. Owais Mohammed
MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
Medical Oncologist
Medical Oncologist
Surgical Oncologist
Dr. Muralidhar Muddusetty
MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
Surgical Oncologist
Surgical Oncologist
Surgical Oncologist
Dr. Vinay Mamidala
MBBS, MS(General Surgery), M.Ch(Surgical Oncology), FMAS, FARIS(Ongoing)
Surgical Oncologist
Radiation Oncologist
Radiation Oncologist
Radiation Oncologist
Hematologist
Surgical Oncologist
Dr. Vajja Sandeep Kumar
MBBS, MS (General Surgery), DrNB (Surgical Oncology), FALS Oncology
Surgical Oncologist
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Sources
- NHS — Blood transfusion
- National Cancer Institute — Surgery to Treat Cancer
- American Cancer Society — Cancer treatment types
- Macmillan Cancer Support — Treatments and drugs
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
Medicines Around Cancer SurgeryBlood thinners and iron before the operationFitness, Tests and PrehabilitationCorrecting a low blood count before surgeryWhy Operations Run Longer Than PlannedBleeding is one reason for a longer waitCost, Insurance and Schemes for Cancer SurgeryWhat schemes cover, including blood bank charges
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Questions about blood before your operation?
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