What Is a Transfusion of Blood and Its Components?
A blood transfusion, or hemotransfusion, is a medical procedure in which blood or its components from a donor are administered to a patient. This procedure is vital in cases of significant blood loss, anemia, blood clotting disorders, and other conditions where the body is unable to produce a sufficient amount of necessary blood elements or has lost them in critical volumes. Modern medicine most often uses individual components rather than whole blood, allowing for a more targeted approach to a patient's specific problems. The main components are red blood cells (which carry oxygen), plasma (the liquid part of the blood containing clotting proteins), and platelets (cells responsible for stopping bleeding).
When Are Plasma and Platelet Transfusions Prescribed?
The decision to transfuse plasma or platelets is made based on a thorough assessment of the patient's condition, laboratory parameters, and clinical picture. Special attention is paid to critically ill patients, including children, whose need for these components may be driven by severe conditions.
According to expert consensus statements from the Transfusion and Anemia EXpertise Initiative (TAXI), plasma and platelet transfusion is a key element of therapy in critically ill children in the following cases [1, 4]:
- Severe Trauma: In significant injuries accompanied by massive blood loss, plasma and platelets help restore blood volume and improve clotting.
- Traumatic Brain Injury: In these cases, maintaining normal coagulation is critical to prevent secondary injury and worsening conditions.
- Intracranial Hemorrhage: Platelet and plasma transfusions may be necessary to stop ongoing bleeding and minimize its consequences.
Experts also emphasize the need for further research to optimize plasma and platelet transfusion strategies in other complex pediatric subgroups, such as patients following cardiopulmonary bypass, during extracorporeal membrane oxygenation (ECMO), as well as children with oncological diseases or after stem cell transplantation [4]. This indicates a continuous search for the most effective and safe approaches in transfusiology.
Potential Risks of Blood Transfusion
Despite the lifesaving role of blood transfusion, this procedure carries certain risks. It is important to understand that each transfusion case requires a careful weighing of potential benefits against possible complications.
A significant risk identified in studies is the fact that the need for a blood transfusion itself may be a risk factor for rebleeding, particularly in patients with acute lower gastrointestinal (GI) bleeding [2]. This means that while a transfusion aims to stabilize the condition, in some cases it may be associated with an increased likelihood of bleeding recurrence. A systematic review and meta-analysis involving data from 14,069 patients showed that the need for a blood transfusion is one of the independent risk factors for rebleeding in acute lower GI bleeding [2].
In addition, risk factors for rebleeding in this patient group also include [2]:
- Age 70 years and older.
- Shock upon admission.
- Arterial hypertension (high blood pressure).
- Concomitant chronic kidney disease (CKD).
- Hyperlipidemia (elevated blood lipid levels).
These data highlight the complexity of managing such conditions and the need for an integrated approach to risk assessment and treatment tactics selection. Physicians always strive to minimize risks by carefully selecting doses and blood components, as well as monitoring the patient's condition before, during, and after the procedure.
The Importance of an Individualized Approach and Research
The decision to transfuse blood or its components is always a complex process requiring deep knowledge and experience. This is especially true for vulnerable patient groups, such as critically ill children. Experts emphasize the importance of an individualized approach based on a thorough assessment of each patient's condition, diagnosis, and concomitant diseases [1, 4].
Ongoing research and the development of consensus guidelines, such as those presented by the TAXI initiative, play a key role in improving transfusion practice. They help standardize approaches, identify the most effective strategies, and minimize risks based on the latest scientific evidence [1, 4]. A multidisciplinary approach involving specialists from various medical fields allows for the most informed decisions, ensuring the best possible outcomes for patients.
Sources
- Plasma and Platelet Transfusion Strategies in Critically Ill Children Following Severe Trauma, Traumatic Brain Injury, and/or Intracranial Hemorrhage: From the Transfusion and Anemia EXpertise Initiative-Control/Avoidance of Bleeding. Pediatric critical care medicine : a journal of the Society of Critical Care Medicine and the World Federation of Pediatric Intensive and Critical Care Societies, 2022
- Risk factors for rebleeding in acute lower gastrointestinal bleeding: a systematic review and meta-analysis. International journal of colorectal disease, 2026
- Research Priorities for Plasma and Platelet Transfusion Strategies in Critically Ill Children: From the Transfusion and Anemia EXpertise Initiative-Control/Avoidance of Bleeding. Pediatric critical care medicine : a journal of the Society of Critical Care Medicine and the World Federation of Pediatric Intensive and Critical Care Societies, 2022
The information provided in this article is for reference purposes only and cannot replace professional medical advice. All decisions regarding treatment and blood transfusion must be made by a qualified medical specialist.