Hemolysis Was Observed at Room Temperature When Testing a Patient's

question 10

Multiple Choice

Hemolysis was observed at room temperature when testing a patient's serum with reagent red cells used for screening.When this test was repeated using the patient's plasma,no hemolysis was observed.What was the most likely explanation for the different reactions?

• A) The plasma sample was collected incorrectly.
• B) The serum sample was contaminated.
• C) Complement activation was inhibited by calcium in the plasma sample.
• D) The serum sample was fresher.

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