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NBME 20 Answers

nbme20/Block 4/Question#49

A 23-year-old woman sustains significant blood loss ...

Direct antiglobulin test

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Direct Antiglobulin = Direct Coombs Test

Detects antibodies bound directly to RBCs. Hemolysis most likely due to something in the transfused blood (not sure why it took 4 weeks when Type 2 HS is supposed to be quicker but w/e).

ergogenic22  there is a delayed onset hemolytic transfusion reaction which should be evaluated with direct cooms test. https://www.ncbi.nlm.nih.gov/books/NBK448158/ +3  
hungrybox  such a dumb question wtf +13  
sonichedgehog  takess longer due to slow destruction by RES +