TABLE 1.

Revised 2019 consensus redefinition for transfusion‐related acute lung injury

TRALI type I

Acute onset

Hypoxemia (P/F‐ratio ≤ 300 or SpO2 < 90% on room air)

Clear evidence of bilateral pulmonary edema on imaging (CXR, Chest‐CT, ultrasound)

No evidence of LAH or, if LAH is present, it is judged to not be the main contributor to the hypoxemia

b. Onset during or within 6 h of transfusion

c. No temporal relationship to an alternative risk factor for ARDS

TRALI type II

Findings as described in categories a and b of TRALI Type I, and

Stable respiratory status in the 12 h before transfusion

Note: Adapted from Vlaar, Transfusion (2019). ¹⁴

Abbreviations: ARDS, acute respiratory distress syndrome; CXR, chest x‐ray; LAH: left‐atrial hypertension; P/F‐ratio, PaO₂/FiO₂‐ratio.