Why is whole blood becoming a thing of the past?
The use of whole donor blood for treating isolated deficiencies (e.g., anemia, thrombocytopenia, leukopenia, or coagulation disorders) has several major drawbacks. First, there is a low therapeutic effect compared to using highly purified concentrates. Second, it causes a high volume load on the patient's cardiovascular system, which can lead to severe hemodynamic disturbances.
Furthermore, whole blood transfusion is an extremely irrational use of valuable donor material. Factors and cells that the recipient does not need at all are introduced into their body, depriving other patients of the opportunity to receive the specific components they require.
Examples of rational component therapy
A sound approach involves using specific products depending on the pathology:
- Hemophilia (Factor VIII deficiency): instead of infusing liters of whole blood, it is sufficient to administer just a few milliliters of specific antihemophilic globulin.
- Hypofibrinogenemia and afibrinogenemia: correction requires about 10–12 grams of fibrinogen concentrate. Obtaining this amount from whole blood would require transfusing about 10 liters into the patient, which is physiologically impossible.
- White blood cell disorders (leukopenia, agranulocytosis, immunodeficiency): targeted administration of leukocyte concentrate is used.
- Anemia: red blood cell suspension is the optimal choice, effectively increasing oxygen-carrying capacity without excess plasma volume.
Risks of whole blood transfusion
One of the most formidable consequences of using whole blood is the sensitization of the recipient's body. Upon introducing a full complex of foreign elements, the immune system begins actively producing antibodies against donor blood cells (leukocytes, platelets) as well as foreign plasma proteins.
Such immunization has far-reaching consequences. It causes severe, life-threatening complications if repeated blood transfusions are needed in the future. Additionally, the presence of these antibodies is critically dangerous for women during pregnancy, as it can provoke immune conflicts.
Strict indications for whole blood transfusion
Despite the priority of component therapy, emergency surgery retains situations where the use of whole blood or specific transfusion methods is justified:
- Acute massive blood loss accompanied by a sharp and critical decrease in circulating blood volume (CBV).
- Exchange transfusions (complete replacement of the patient's blood with donor blood).
- The use of cardiopulmonary bypass machines, for example, during major open-heart surgeries.
Within these indications, various techniques may be used, including autologous blood transfusion (transfusing the patient's own blood, harvested in advance or collected during surgery) and direct blood transfusion.
Briefly: answers to topical questions
Which groups of plasma-substituting fluids are used together with blood components?
Crystalloid and colloid solutions are used alongside blood components.
- Crystalloid (electrolyte) solutions allow for rapid administration, but only about 25% of the volume remains in the vascular bed.
- Colloid solutions are high-molecular-weight volume expanders that increase circulating blood volume to 1.2–1.3 times the volume infused.
- Solutions with rheological and detoxifying effects are used in the complex therapy of complications.
What methods of autologous blood transfusion exist?
Methods include preoperative harvesting of the patient's own blood and intraoperative salvage.
- Preoperative autologous blood transfusion involves blood collection and conservation before surgery. Standard procedures (collecting no more than 500 mL 4–6 days prior) or staged harvesting of larger volumes (up to 1500 mL over 25 days) are used.
- Intraoperative hardware blood salvage is a method of collecting and returning blood during surgery to preserve circulating blood volume.
Which blood product is transfused for the targeted correction of thrombocytopenia?
For the targeted correction of thrombocytopenia and related hemostatic disorders, patients are transfused with platelet concentrate or platelet suspension. In surgical interventions for hemorrhagic diathesis accompanied by a decreased platelet count, whole blood infusion combined with vitamins K and C may also be used.
How does a direct blood transfusion differ from an exchange transfusion?
Direct transfusion involves the immediate transfer of blood from a donor to a recipient, whereas exchange transfusion involves the simultaneous removal of the patient's blood and infusion of donor blood.
| Characteristic | Direct transfusion | Exchange transfusion |
|---|---|---|
| Core of the method | Direct transfer of blood from donor to recipient | Simultaneous removal and infusion of blood |
| Indications and purpose | Hemophilia, coagulation disorders, grade III traumatic shock with blood loss exceeding 25–50% of CBV and no response to stored blood | Replacement and detoxification |
| Volume | Transfusion via syringe method | 10–15 L of donor blood for complete replacement |
The "Sniper and Shotgun" Rule: Component therapy hits the target precisely (sniper), solving a specific problem. Whole blood works like a shotgun—it hits everything around it, introducing excess volume and the risk of immune reactions.
Class and exam questions
Why is post-transfusion sensitization dangerous?
Sensitization leads to the production of antibodies against foreign leukocytes, platelets, and plasma proteins. This threatens severe immune complications during subsequent transfusions or pregnancy.
In which cases is whole blood still used?
It is used in acute blood loss with a sharp drop in CBV, exchange blood transfusions, and cardiopulmonary bypass during cardiac surgeries.
What else to study on this topic
- Mechanisms of acute blood loss development and methods for assessing CBV reduction
- Autologous blood transfusion: indications, contraindications, and harvesting techniques
- Technique and indications for exchange blood transfusion
- Plasma-substituting fluids: classification and combination with blood components
- Principles of operation of cardiopulmonary bypass machines
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Other topics in the section "CHAPTER 6. BLOOD TRANSFUSION"
Prepared by WhiteCoat Pro faculty in accordance with the medical school curriculum. For educational purposes only.