[Allogenic blood transfusion for surgery]

Area of Science:

• Anesthesiology and Perioperative Medicine
• Hematology
• Surgical Critical Care

Context:

• Blood transfusions are vital for surgical patients, primarily to replace intraoperative blood loss.
• Oxygen carrying capacity, influenced by hemoglobin and cardiac output, dictates transfusion triggers.
• Established guidelines, like the US 1988 decision for a hemoglobin trigger of 7.0 g/dL, guide transfusion practices.

Purpose:

• To elucidate the indications and triggers for red blood cell, plasma, and platelet transfusions in surgical settings.
• To clarify the management of coagulopathy and hemostasis in patients experiencing massive hemorrhage during surgery.
• To provide a concise overview of current transfusion strategies in surgical patient care.

Summary:

• Red blood cell transfusion aims to maintain oxygen carrying capacity, with a general trigger of 7.0 g/dL hemoglobin, adjusted for cardiac conditions.
• Plasma transfusion is indicated for dilution coagulopathy when prothrombin time exceeds 16 seconds, replenishing coagulation factors.
• Platelet transfusion is recommended for massive bleeding ( >1.5 blood volume) with platelet counts below 50,000/mm³ to ensure hemostasis.

Impact:

• Optimizing transfusion strategies can improve patient outcomes and reduce unnecessary blood product utilization in surgery.
• Clearer guidelines for plasma and platelet transfusions enhance the management of complex bleeding scenarios.
• This review supports evidence-based transfusion protocols, crucial for patient safety in surgical environments.