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The page below is a sample from the LabCE course Adverse Effects of Fresh Frozen Plasma Transfusion: TRALI, TACO and Allergic Reactions. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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ATR Mechanism and Prevention

It has been demonstrated that certain patients are more prone to ATRs, suggesting that certain donor factors play a role. Like TRALI, it has been suggested that ATRs are most likely to be a two-hit mechanism in which the recipient becomes primed or sensitized prior to transfusion.
Except for the prophylactic use of IgA-deficient donors and plasma reduction for recipients with high-titer class-specific anti-IgA, prevention of ATRs has been limited to pretreatment with antihistamines or steroids. Fortunately with the exception of the anti-IgA related anaphylaxis, most allergic reactions are mild and do not have serious clinical sequelae. They do however result in significant discomfort, cost (for serologic workup), and product wastage.