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NBME 22 Answers

nbme22/Block 1/Question#16

An Rh-negative woman, gravida 3, para 2, has had an ...

O, Rh-negative

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Mother is Rh-neg --> she will generate RH-antibodies 1) fetus affected by Anti-Rh if it is Rh-positive 2) even if O-Rh-Positive is given, then still mother's Rh-antibodies will attack transfused blood due to its cells containing Rh+ 3) therefore, O-Rh-negative is best

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submitted by keycompany(123),

O, Rh-negative blood is the universal donor for blood plasma.

keycompany  Edit:: Blood RBCs*** +  

The mother is Rh - & fetus is Rh +

pg 397 FA 2019 Administration of anti-D IgG to Rh - pregnant mother during 3rd trimester & early postpartum period (if fetus Rh+)

Prevents maternal anti-D IgG production

anti-D IgG = O, Rh -