Praxis Medical Insights

Definition and Diagnosis

TRALI presents as acute lung injury within 6 hours of transfusion with key clinical features including hypoxemia, respiratory distress, dyspnea, and bilateral pulmonary infiltrates without evidence of circulatory overload 1
TRALI must be differentiated from Transfusion-Associated Circulatory Overload (TACO), which presents with similar respiratory symptoms but includes cardiovascular changes and evidence of fluid overload 2
All suspected cases of TRALI should be promptly reported to the local blood bank as it is a leading cause of transfusion-associated morbidity and mortality 3

Immediately stop the transfusion when TRALI is suspected 1
Monitor vital signs closely, including respiratory rate, pulse, blood pressure, and temperature 2
In ventilated patients, monitor peak airway pressure 2
Avoid diuretics, which are ineffective for TRALI and may worsen the condition 1

Blood banks have implemented measures to reduce TRALI risk, including screening donors for leukocyte antibodies 1
Fresh frozen plasma (FFP) and platelet concentrates are the blood components most frequently implicated in TRALI 1
Careful assessment of the need for transfusion, especially in high-risk patients, is essential 2

In massive transfusion scenarios, using appropriate ratios of blood products may help manage overall transfusion risks 4, 5
Careful monitoring for transfusion reactions is essential during massive transfusion protocols 2

The syndrome results primarily from immune reactivity of leukocyte antibodies, with signs and symptoms typically appearing 1-2 hours after transfusion, according to the American Society of Anesthesiologists 6

Female blood donors with previous pregnancies frequently have HLA antibodies, however no specific data is provided in the article regarding this fact, but it is mentioned that testing of female apheresis platelet donors for HLA antibodies has been implemented as an additional risk reduction strategy, although no specific citation is provided in the article for this information, the initial statement about the syndrome is 6

The American Society of Critical Care Medicine recommends reporting every suspected case to the local blood bank immediately, as TRALI is underdiagnosed and underreported despite being a leading cause of transfusion-associated mortality 7

The use of male-only plasma donors is preferred by blood banks to reduce the risk of TRALI, as fresh frozen plasma (FFP) and platelet concentrates are the blood products most frequently implicated in TRALI 7