At a glance
A blood transfusion is a medical procedure in which donated blood, or specific parts of blood, are delivered directly into a patient's vein to replace what the body is missing or has lost.
Blood is made up of several components: red blood cells (which carry oxygen), platelets (tiny cells that help clots form), plasma (the liquid portion that carries proteins and nutrients), and white blood cells (which fight infection). Depending on what the patient needs, the doctor may give whole blood or just one of these components. The donated blood travels through a thin plastic tube into a vein, usually in the arm, and the body begins using it within minutes.
Medical Condition
Doctors order a blood transfusion when the body cannot maintain enough of a blood component on its own, either because of sudden loss, low production, or rapid destruction.
- Severe anaemia (low red blood cell count) caused by iron deficiency, kidney disease, or chronic illness
- Major blood loss during surgery, trauma, or childbirth
- Sickle cell disease (a condition where red blood cells are abnormally shaped and break down too quickly)
- Thalassaemia (an inherited condition that reduces normal haemoglobin production)
- Thrombocytopenia (dangerously low platelet count) due to chemotherapy, bone marrow disease, or immune disorders
- Haemophilia (a genetic condition that prevents normal clotting) or other bleeding disorders requiring clotting factors from plasma
- Blood cancers such as leukaemia (cancer of blood-forming cells) or lymphoma, where bone marrow cannot produce enough healthy blood cells
- Severe burns that cause large fluid and protein losses
A transfusion is not suitable for every patient with a low blood count. Doctors carefully weigh the benefits against the risks, particularly in patients with certain heart or lung conditions, those who have had previous transfusion reactions, or those whose religious beliefs exclude the use of donated blood. Alternative treatments such as iron therapy or medications that stimulate the bone marrow are considered first when they are likely to be effective.
- Patients with mild anaemia who are stable and responding to other treatment
- Patients with a known history of severe transfusion reactions that cannot be prevented
- Situations where the patient refuses blood products for personal or religious reasons
Risks & Complications
Blood transfusions are generally safe when matched and monitored carefully, but like any medical procedure they carry recognised risks.
- Febrile non-haemolytic reaction: a fever and chills during or shortly after the transfusion, the most common side effect, usually mild and manageable
- Allergic reaction: itching, rash, or hives, ranging from mild to, rarely, a severe allergic response
- Haemolytic reaction (breakdown of the transfused red blood cells): can happen if blood types are mismatched; hospitals use strict checking procedures to prevent this
- Transfusion-associated circulatory overload (TACO): too much fluid given too quickly can strain the heart and lungs, particularly in older patients or those with heart disease
- Transfusion-related acute lung injury (TRALI): a rare but serious reaction in which the lungs fill with fluid in the hours following a transfusion
- Infection transmitted through blood: extremely rare with modern screening, but residual risk exists for viruses such as hepatitis B, hepatitis C, and HIV
- Iron overload: patients who need many transfusions over time can accumulate too much iron in their organs
- Graft-versus-host disease: very rare, occurs mainly in patients with severely weakened immune systems when donor immune cells attack the recipient's tissues
Preparation & Procedure
Fasting is not usually required before a planned blood transfusion, although if the transfusion is part of a surgical procedure, the fasting rules for that surgery apply. In urgent situations, there is no preparation time at all.
Patients taking blood thinners (anticoagulants) or certain other medications should let the medical team know, as adjustments may be made depending on why the transfusion is needed. Smoking and alcohol do not directly affect the transfusion itself, but the team needs to know about any substances the patient uses regularly.
Before a transfusion, the following tests are typically done to make it safe.
- Blood typing: a sample of the patient's blood is tested to determine the ABO group and Rh factor (for example, O positive or A negative)
- Crossmatching: the patient's blood is mixed with a small sample of the donor blood in the laboratory to confirm they are compatible before the full transfusion begins
- Full blood count: measures current levels of red blood cells, white blood cells, and platelets to decide exactly what is needed
- Infection screening: the donor blood has already been screened for major infections, but the patient's baseline infection status may also be checked
Once everything is confirmed, the transfusion itself follows a consistent set of steps.
- 1. A nurse or doctor inserts a small needle into a vein, usually on the back of the hand or inside the elbow, and secures a thin plastic tube called an intravenous (IV) cannula.
- 2. The correct blood unit is checked against the patient's wristband and identity documents by two members of staff, following a formal safety checklist.
- 3. The blood bag is connected to the IV tube and hung above the patient on a drip stand; flow is controlled by an electronic pump or a manual regulator.
- 4. The first fifteen to thirty minutes are closely watched because most reactions occur early; the nurse checks temperature, blood pressure, heart rate, and breathing.
- 5. If no reaction occurs, the transfusion continues at the planned rate; one unit of red blood cells usually takes between one and four hours depending on urgency and the patient's heart condition.
- 6. When the bag is empty, the line may be flushed with saline (a salt solution) and the cannula removed, or left in place if further units are needed.
- 7. A final set of observations is recorded before the patient is declared stable.
Aftercare
Most patients who receive a transfusion stay under observation for at least an hour after it ends, and those in hospital remain monitored overnight or longer depending on the underlying illness.
- The puncture site on the arm is covered with a small dressing; gentle pressure is applied for a few minutes to stop any minor bleeding
- Patients are asked to report any new symptoms promptly: fever, chills, rash, shortness of breath, lower back pain, or dark urine, as these can signal a delayed reaction
- Strenuous physical activity is usually avoided for at least 24 hours after a transfusion, especially if the patient was already weakened
- A follow-up blood count is typically taken within 24 hours to check whether the transfusion achieved the target level and to guide decisions about further treatment
- Patients receiving regular transfusions for chronic conditions such as thalassaemia will have a scheduled programme with blood count checks before each visit
- Iron chelation therapy (medication to remove excess iron from the body) may be started for patients who need repeated transfusions over many months
- Any underlying condition driving the need for transfusion continues to be managed alongside the transfusion programme
Cost & What Determines It
The cost of a blood transfusion varies widely because it is rarely a standalone event: it is usually tied to an underlying condition, a hospital stay, or a broader treatment programme, each of which adds its own costs.
- Complexity and urgency: an emergency transfusion during trauma surgery involves far more staff and resources than a scheduled transfusion for a chronic condition
- Number of units: the more units of blood or components (red cells, platelets, plasma) required, the higher the total cost
- Type of blood product: specialised products such as irradiated blood (treated to reduce the risk of graft-versus-host disease in vulnerable patients) or washed red cells cost more than standard units
- Blood bank and laboratory fees: crossmatching, blood typing, and compatibility testing all carry separate charges in many hospitals
- Hospital class and country: the same transfusion delivered in a private specialist hospital abroad costs differently from a district hospital at home
- Length of stay: inpatients who need observation for reactions or who are admitted for the underlying condition add bed, nursing, and monitoring costs
- Additional monitoring and tests: follow-up blood counts, infection screening, and cardiac monitoring during transfusion are billed separately in many settings
- Medications: drugs given to manage or prevent reactions, or to treat the underlying cause, are usually itemised separately
Hospital packages for planned transfusions often include the blood unit itself, laboratory compatibility testing, nursing care during the infusion, and a basic post-transfusion blood count. Items that tend to be billed separately include the specialist consultation, admission fees if overnight monitoring is needed, any additional blood products beyond the originally planned number of units, and medications used during or after the procedure.
For Indonesian patients considering treatment abroad, BPJS Kesehatan does not cover procedures performed outside Indonesia, and most standard Indonesian health insurance policies exclude overseas care as well. Patients typically pay out of pocket or rely on private international health insurance that specifically covers overseas treatment. Before travelling, requesting a detailed written cost estimate from the treating hospital, covering all foreseeable items, is the most reliable way to avoid unexpected bills on arrival.
Frequently Asked Questions
How many sessions of blood transfusion will I need?
The number of transfusions depends on your underlying condition and how your body responds to each one. Some people need only a single session, while others with ongoing conditions such as severe anaemia (low red blood cell count) or blood disorders may need regular transfusions over weeks or months. Your haematologist will reassess your blood levels after each session before deciding whether another is needed.
What does a blood transfusion feel like?
Most people feel little or nothing during the transfusion itself, which is given through a small needle in a vein in your arm. You may notice a cool sensation as the blood enters, and some people feel mild fatigue or slight warmth. Staff monitor you throughout for any reactions, so let them know straight away if you feel itchy, short of breath, or develop a rash.
How soon will I feel better after a blood transfusion?
Many people notice improved energy and less breathlessness within a day or two after the transfusion, once the new red blood cells begin carrying oxygen around the body. How quickly and how much you improve depends on the reason you needed the transfusion in the first place. Your doctor will check your blood count after the procedure to see how well your body has taken up the donated cells.
How much does a blood transfusion cost?
The cost varies depending on how many units of blood are required, the hospital class you choose, the length of monitoring needed, and any additional tests such as blood typing and cross-matching (checking donor blood is compatible with yours). A written estimate from the hospital gives you the most accurate figure for your specific situation.
This page is general information, not a substitute for medical advice. Every case is different. Your doctor decides what is right for you.
