Friday, November 18, 2011

16 November 2011

It really aggravates me when I am trying to study and actually read the review answers and I get something like this horse squeeze:
“Laboratory tests are ordered for two hospitalized patients. During the phlebotomy procedure, the Vacutainer tubes drawn from these patients are mislabeled. One of the patients receives a blood transfusion later that day. Within 1 hour after the transfusion of RBCs begins, the patient becomes tachycardic and hypotensive and passes pink-colored urine. Which of the following statements best describes how this reaction is mediated?”

I had it narrowed down between:
B) Antibody-dependent cellular cytotoxicity by natural killer cells
D) Complement-mediated lysis of RBCs

Needless to say I got it wrong, and chose B, but that’s not what aggravates me, because I usually LEARN from answering questions incorrectly. I proceed to the explanations and this is what I get RE: answer B:

“…Natural killer cell lysis is seen with antibody-mediated diseases.” You don’t say, Sherlock! Obviously I should have known that the process was complement-mediated, but I thought differently. C’est la vie, I can get over that. I’m kvetching because that is a completely USELESS statement. Yeah I’m making something out of nothing, but it’s these “DUH!” circular statements that make me wonder how much the schmucks who wrote this got paid…

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