What is Homologous Blood Transfusion

Homologous blood transfusion involves transferring blood from a compatible donor to a recipient to treat blood loss, anemia, or during surgical procedures.

What is Homologous Blood Transfusion

  • Category

    General

  • Published By

    GetWellGo Team

  • Updated on

    29-Apr-2025

What is Homologous Blood Transfusion?

Homologous Blood Transfusion is a process in which donated blood from a different individual of the same species is given to a patient suffering from deficiency of blood components in his body. 

Homologous Blood Transfusion Procedure

Homologous blood transfusion steps:

Pre-Transfusion Preparation

  • Patient Assessment: The patient assessment is done by the doctor who examines the reasons for the transfusion (blood loss, anemia, etc.).
  • Blood Types and Cross Match: The blood test done on you will include the ABO and Rh factor. A “crossmatch” test helps to make sure that the donor blood will be suitable for your blood type.
  • Consent: A procedure, advantages, and possible undesirable effects are explained to you, and, if you are a minor, your parents or any other person responsible for you completes the consent questionnaire.
  • Vital Sign Check: Blood pressure, pulse, temperature, and respiratory rate must be checked before the task begins.

Blood Collection and Screening (Donor Side)

  • Blood is taken from a healthy donor.
  • The blood which is to be donated is first tested for any infections such as HIV, Hepatitis B/C, and syphilis amongst others.
  • Protein fractions, red cells, plasma, and even platelets could be required depending on the case of transfusion required.

Setting up the Transfusion

  • IV Access: A cannula is then sited in the patient’s vein most preferably in the arm.
  • Blood Bag and Tubing Preparation: a suitable calibrated donor blood bag is connected to specific tubing that contains filters and then joined to the IV line.
  • Double Checking: Two different healthcare workers must confirm your identity with the blood type and details on the blood bag.

During the Transfusion

  • This is done so as to first check for any signs of an adverse reaction to the transfused blood component to the patient.
  • If there is no difficulty after about 15 minutes the rate can be increased.
  • Vital Signs Monitoring: Nurses check your blood pressure, pulse, and temperature regularly throughout.
  • In general, transfusing a unit of blood may possibly take 1.5 to 4 hours depending on the circumstances.

Post-Transfusion Care

  • Over time, you have to be watched for any complications that may arise with either a delayed response or exaggerated reaction after transfusion.
  • Vital Signs Reassessment: Blood pressure, pulse, and later on, temperature are checked again.
  • Documentation: It is documented in the patient’s medical record.
  • Recheck: At times a blood test maybe carried to check whether the transfusion rectified the problem eg; increase in the Haemoglobin level.

Types of Homologous Blood Transfusion

The classification of homologous (allogeneic) blood transfusion mostly depends on the blood product that is being administered. Here's a clear breakdown:

Whole Blood Transfusion

  • What it is: Whole blood means the transferred blood which has not been processed and contains all the components like red cells, plasma, platelets and white cells that comes from the donor.
  • When used: Rare today. Primarily in cases of haemorrhage, either through injury or operation.

Packed Red Blood Cells (PRBCs) Transfusion

  • What it is: This is sometimes called ‘red blood cell transfusion’ where by plasma is mostly eliminated.
  • When used: To replenish the potassium level or replace the lost blood with little volume of fluids.

Platelet Transfusion

  • What it is: Only Platelets that are used which are helpful in the clotting of the blood.

  • When used: In those patients who are suffering from thrombocytopenia such as cancer, bone marrow failure and dengue fever.

Plasma Transfusion (Fresh Frozen Plasma FFP)

  • What it is: Whole blood is not given at all, while only the liquid part of the blood – the plasma which contains the clotting factors – is infused.
  • It is used in patient with bleeding disorders, liver disease, or in case of massive transfusion.

Cryoprecipitate Transfusion

  • What it is: A portion of plasma select for certain clotting protein such as the fibrinogen and the factor eight.
  • It is used in the management: For hemophilia, von Willebrand disease and fibrinogen deficiency.

Granulocyte (White Blood Cell) Transfusion

  • What it is: White Blood Cell transfusion.
  • It is used: Only in exceptional occasions, when the patient suffers from a severe infection and the neutrophil level is very low and does not respond to antibiotics.

Benefits of Homologous Blood Transfusion

Here are the main benefits of homologous (allogeneic) blood transfusion:

  • Life-Saving in Emergencies
  • Treatment for Anemia and Blood Disorders
  • Support During Major Surgeries
  • Boosts Immunity Temporarily
  • Corrects Clotting Disorders
  • Available on Demand
  • Component-Specific Therapy

Risks of Homologous Blood Transfusion

Here are the main complications of homologous blood transfusion:

  • Allergic Reactions
  • Fever (Febrile Non-Hemolytic Reaction)
  • Hemolytic Reaction (Acute or Delayed)
  • Iron Overload
  • Infections
  • Graft-versus-Host Disease (GVHD)
  • Lung Injury (TRALI - Transfusion-Related Acute Lung Injury)

Homologous vs Autologous Blood Transfusion

Feature

Homologous Blood Transfusion

Autologous Blood Transfusion

Definition

Blood transfusion using blood from a different donor (same species).

Blood transfusion using the patient’s own blood.

Source of Blood

Collected from a volunteer donor.

Collected from the patient before surgery, or recovered during/after surgery.

Blood Type Matching

Essential — requires careful cross-matching (ABO, Rh).

No matching needed — it’s the patient's own blood.

Risk of Reactions

Higher — risk of allergic, febrile, hemolytic reactions, infection.

Very low — no risk of immune reaction or transmitted infections.

Risk of Infection

Small but present (HIV, hepatitis, bacterial contamination).

Extremely rare. Almost no risk of transmitted infections.

Preparation Time

Quick — blood is available from blood banks.

Needs advance planning — blood is collected days or weeks before surgery.

Common Uses

Emergencies, trauma, anemia, surgeries when patient's blood is not available.

Elective surgeries (planned operations) — for patients wanting to avoid donor blood.

Cost

Usually cheaper and more accessible.

Often more expensive due to special handling and storage.

Storage

Standard blood banking systems.

Special procedures to store the patient’s blood safely.

 

Indications for Homologous Blood Transfusion

 

Here are the main indications (reasons) for a homologous blood transfusion:

  • Acute Blood Loss
  • Surgical Procedures
  • Severe Anemia
  • Cancer Treatments
  • Bleeding Disorders
  • Platelet Disorders
  • Burns and Severe Infections
  • Neonatal Conditions

Homologous Blood Transfusion Advantages and Disadvantages

Advantages of Homologous Blood Transfusion

Widely Available

  • Blood banks store large supplies of donor blood and components.

Life-Saving

  • Rapid replacement of blood volume in emergencies (accidents, major surgeries, severe bleeding).

Component Therapy

  • Simply, you receive what is required, red cells, platelets, plasma, clotting factors and none of the body components are given which are not required.

No Delay for Collection

  • Fresh blood is always available since it does not undergo through the process of collection from the donor before it is used like the autologous transfusions.

Supports Patients with Chronic Conditions

  • Regular transfusions available for diseases like thalassemia, sickle cell anemia, and blood cancers.

Helps in Complex Medical Situations

  • Vital in critical care (ICU), trauma centers, cancer treatments, and transplant surgeries.

Disadvantages of Homologous Blood Transfusion

Risk of Transfusion Reactions

  • This program has been left for Allergic reactions, febrile reactions, Hemolytic reactions including those matching effort.

Risk of Infections

  • Tiny risk of infections like HIV, hepatitis B/C, bacterial infections despite strict screening.

Immune System Complications

  • Blood transfusion also has some side effects when the patient receives many jars of blood; immune sensitization (antibodies against donor blood).

Iron Overload

  • Multiple transfusions have an impact on increasing the iron levels and to cause damage to many organs including the heart rate, liver, etc.

Rare but Serious Risks

  • TRALI in the lung, GVHD in the immunocompromised patients.

Compatibility Issues

  • In matched sparing, it is not easy to locate an ideal match for a certain blood group, even the rare ones.

Importance of Homologous Blood Transfusion

Saves Lives in Emergencies

  • During trauma, accidents or major surgeries, there is need for quick transfusion of blood to prevent death due to excessive bleeding.

Supports Surgical Success

  • Several operations such as heart operations, transplantations, and most cancer or tumour surgeries, among other important operations will not be feasible without donor blood.

Coping with Severe Anemia and Blood Disorders

  • Those with severe anemia, thalassemia, sickle cell disease, or bone marrow failure have stronger and longer lives due to the fact that normal blood transfusion is available to them.

Corrects Clotting Problems

Plasma and clotting factors are used in the management of bleeding disorders for patients with haemophilia, liver disease, or DIC.

Improves Recovery and Healing

  • Increasing the capacity of oxygen delivery, which can be achieved by increasing red blood cells, enhances the recovery of wounds as well as surgical procedures.

Maintains Blood Volume and Pressure

  • Blood transfusions are used to replace volume, restore blood pressure and organ blood flow in critically ill or shocked patients.

Accessible and Ready

  • Since blood banks involve in storage and preparation of blood, it can be dispatched when required other than getting from the autologous collection.

Essential for Cancer and Chemotherapy Care

  • It is hence clear that many cancer patients require blood and platelet transfusions to supply their body with blood during intensive treatment.

Homologous Blood Transfusion in Surgery

The term homologous transfusion during the surgery means that a patient receives blood from the donor during or after an operation to meet the body’s requirement.

Why It’s Needed in Surgery:

  • Replace Blood Loss
  • Maintain Oxygen Delivery
  • Prevent Low Blood Pressure (Hypotension)
  • Correct Bleeding Disorders
  • Support Recovery Post-Surgery



 

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