Management of Massive Blood Transfusion Reaction

Immediate Actions When Reaction Suspected

Control obvious bleeding points using direct pressure, tourniquets, or hemostatic dressings as the paramount priority 1, 3, 4
Maintain IV access and secure large-bore access (8-Fr central access is ideal in adults; consider intra-osseous or surgical venous access if peripheral fails) 3, 4
Administer high FiO2 to ensure adequate oxygenation 3, 4, 2

Obtain baseline bloods: FBC, PT, aPTT, Clauss fibrinogen, and cross-match 3, 4, 2
Use near-patient testing (TEG or ROTEM) if available for rapid coagulation assessment 3, 4
Monitor blood lactate and base deficit as sensitive indicators of hypoperfusion and shock severity 5

For severely traumatized patients with massive hemorrhage, use 1:1:1 red cell:FFP:platelet regimens as used by the military 1, 2
Begin early FFP administration at 10-15 ml/kg to prevent dilutional coagulopathy before it develops if a senior clinician anticipates massive hemorrhage 1, 2, 5
Use warmed blood and blood components for fluid resuscitation - blood group O is quickest, followed by group-specific, then cross-matched blood 3, 4, 2
In massive bleeding, group-specific blood can be issued without performing an antibody screen because patients will have minimal circulating antibodies 1, 6
O negative blood should only be used if blood is needed immediately 1

A fibrinogen <1 g/L or PT/aPTT >1.5 times normal represents established hemostatic failure and predicts microvascular bleeding 1
Established coagulopathy requires more than 15 ml/kg of FFP to correct 1, 2
The most effective way to achieve rapid fibrinogen replacement is by giving fibrinogen concentrate or cryoprecipitate if fibrinogen is unavailable 1, 2
Maintain a minimum target platelet count of 75 × 10⁹/L in this clinical situation 1, 2

Actively warm the patient and all transfused fluids using adequate warming devices available in all emergency rooms and theatre suites 3, 7, 4
Once bleeding is controlled, aggressively normalize blood pressure, acid-base status, and temperature, but avoid vasopressors 3, 4, 2
Monitor and correct electrolyte abnormalities, particularly hypocalcemia from citrate toxicity, to prevent cardiac dysfunction 2

Consider surgery early - damage control surgery may be necessary, limited to controlling bleeding before complete physiologic normalization 3, 4, 2
Rapid access to imaging (ultrasound, radiography, CT) or focused assessment with sonography for trauma scanning if patient sufficiently stable 3, 4
Alert theatre team about the need for cell salvage autotransfusion 3, 6, 4, 2

Admit to critical care area for monitoring of coagulation, hemoglobin, blood gases, and wound drain assessment to identify overt or covert bleeding 3
Commence standard venous thromboprophylaxis as soon as possible after hemostasis is secured as patients rapidly develop a prothrombotic state following massive hemorrhage 1, 3, 2

Do not delay activation of the massive transfusion protocol - activate immediately when massive hemorrhage is declared, as delay increases mortality 1, 2
Do not wait for laboratory results before administering blood products in obvious massive hemorrhage, as this increases mortality 2
Do not administer excessive crystalloid as this causes dilutional coagulopathy and worsens outcomes; transition to blood products early 5
Do not use hemoglobin level as the sole trigger for transfusion, as this fails to account for the dynamic nature of hemorrhagic shock 5
Do not attempt to achieve normal blood pressure initially - restore organ perfusion but avoid aggressive normalization until bleeding is controlled 3, 4