[Transfusion-related acute lung injury]

Area of Science:

• Hematology
• Pulmonology
• Critical Care Medicine

Background:

• Transfusion-related acute lung injury (TRALI) is an interstitial lung injury occurring within 6 hours of blood transfusion.
• Diagnosis requires excluding other causes of lung edema, focusing on arterial desaturation without cardiac failure.
• Mechanisms include immune conflicts and neutrophil activation by transfusion components.

Purpose of the Study:

• To address the underestimation of TRALI frequency due to lack of definition and understanding.
• To present recent clinical and biological data enhancing TRALI knowledge.
• To improve the understanding of TRALI mechanisms and identify at-risk factors.

Main Methods:

• Review of clinical and biological data related to TRALI.
• Analysis of diagnostic criteria, including timing and exclusion of other conditions.
• Discussion of identified etiological mechanisms.

Main Results:

• TRALI diagnosis is based on acute onset of lung edema post-transfusion, excluding other causes.
• Key mechanisms involve immune reactions and neutrophil activation.
• Predisposing factors include pre-existing conditions like lung capillary leukostasis.

Conclusions:

• Improved understanding of TRALI enhances knowledge of blood transfusion's role in complex lung edema.
• This knowledge facilitates better identification of at-risk patients and blood components.
• Further research can refine diagnostic criteria and preventative strategies.