In managing neonatal alloimmune thrombocytopenia, how are platelets transfused?

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Multiple Choice

In managing neonatal alloimmune thrombocytopenia, how are platelets transfused?

Neonatal alloimmune thrombocytopenia arises when maternal IgG antibodies target a fetal platelet antigen inherited from the father, leading to destruction of the infant’s platelets and a risk of bleeding, including intracranial hemorrhage. The key to management is giving platelets that won’t be destroyed by those maternal antibodies. Transfuse platelets that do not express the offending antigen. Ideally, use maternal platelets because they lack the paternal antigen that the mother’s antibodies are against, so these platelets are not targeted. If maternal platelets aren’t available or sufficient, transfuse platelets from an antigen-negative donor. This approach bypasses the antibody-mediated destruction and helps raise the infant’s platelet count. Consider IVIG for the mother to reduce the circulating alloantibodies and lessen platelet destruction, complementing the transfusion strategy. Transfusing random donor platelets risks supplying platelets that carry the targeted antigen and would be promptly destroyed. Red blood cells don’t address the thrombocytopenia, and doing nothing can lead to significant bleeding.

Neonatal alloimmune thrombocytopenia arises when maternal IgG antibodies target a fetal platelet antigen inherited from the father, leading to destruction of the infant’s platelets and a risk of bleeding, including intracranial hemorrhage. The key to management is giving platelets that won’t be destroyed by those maternal antibodies.

Transfuse platelets that do not express the offending antigen. Ideally, use maternal platelets because they lack the paternal antigen that the mother’s antibodies are against, so these platelets are not targeted. If maternal platelets aren’t available or sufficient, transfuse platelets from an antigen-negative donor. This approach bypasses the antibody-mediated destruction and helps raise the infant’s platelet count.

Consider IVIG for the mother to reduce the circulating alloantibodies and lessen platelet destruction, complementing the transfusion strategy.

Transfusing random donor platelets risks supplying platelets that carry the targeted antigen and would be promptly destroyed. Red blood cells don’t address the thrombocytopenia, and doing nothing can lead to significant bleeding.

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