Which two of the following conditions are the most serious immediate consequences of severe HDN?

Which of the following Duffy phenotypes is prevalent in blacks but virtually nonexistent in whites?

Armature resistance control method is used for the _______

Which of the following would be acceptable alternative for a packed red-cell transfusion if ABO group-specific blood were not available?

A test tube containing known antibody and unknown cells has been incubated and spun.  After dislodging the cell button completely, several large agglutinates are apparent with no small clumps or free cells visible.  The background solution is clear.  This reaction should be graded as

The emf induced in the dc generator armature winding is

The Clinical Laboratory Technician (CLT) is working along in the transfusion service of a community hospital one night when a new Emergency Department (ED) staff member arrives anxiously stating that the physician has ordered two units of packed cells STAT and uncrossmatched.  Which of the following must the CLT do?

A patient has a hemoglobin of 7.1 g/dL.  The surgeon wants to raise the hemoglobin to 10 g/dL before surgery.  How many units of RBC need to be administered to this patient to raise the hemoglobin to the required level?

A patient with a warm autoantibody has a positive DAT.  The antibody screen was negative, but the eluate reacted uniformly with all normal cells and patient cells.  Why as the antibody screen negative?

If a group A individual reacts 3+ with A1 lectin, the person is a (an):