Lecture Questions Flashcards
Which of the following occurs during storage of RBCs?
pH Decreases
2,3 DPG increases
ATP increases
Plasma K+ increases
pH Decreases
Plasma K+ Increases
Which of the following immunoglobulins is most efficient at causing direct hemmagglutination
IgG
IgM
IgA
IgE
IgM
Nurse just called to add a crossmatch to a specimen that was worked up 4 days ago. What is the most appropriate course of action?
Check to see if there is enough volume
Perform compatibility testing on the original sample
Indicate to the nurse that a new sample must be collected
Repeat the type/screen testing on original sample to check for new antibodies
Indicate to the nurse that a new sample must be collected
Patient Plasma with donor RBC produced and agglutination reaction of 1+. How is this interpreted?
Weak Rxn. Patient can tolerate.
Donor blood is compatible with patient plasma
Donor plasma is compatible with patient blood
Donor blood is incompatible with patient plasma
Donor blood is incompatible with patient plasma
Anti A1 lectin is QC’d daily. It is used today. What 2 reagents are the bet to use for positive and negative controls?
A1 & B Cells
B & O cells
Anti-A & Anti-B
A1 cells & A2 cells
A1 Cells & A2 Cells
Anti-A: 4+
Anti-B: 3+
Anti-AB: 4+
A1 Cell: 2+
BCells: 4+
What is NOT a reasonable interpretation of these results?
A1B with Anti-I
A2B with Anti-A1
AB2 with Anti-B1
O with Cold agglutination
AB2 with anti-B1
A patient with hh, LeLe, sese A genes will express what genes on their RBCs?
A, H, Lea
Lea only
A & H only
A, H, Lea, Leb
Lea Only
What is the Rh blood group named for?
Function on the cell
The scientist who discovered it
position in the alphabet
a monkey
A monkey
in which population is it important to ID partial D
Cardiac
Elderly
Prenatal
Sickle Cell disease
Prenatal
A woman has anti-C titer of 32 types as Rh Pos. Her baby has a negative DAT and is not effected by HDN. What is the father’s most likely genotype?
rr
r”r
R1r
R2r
R1r
Which of the following Rh antigens has the highest frequency in Caucasians?
D
E
c
e
e
Which of the following reagents facilitates hemagglutination following sensitization of RBC w/ IgG alloantibody
Anti Human globulin
Low ionic strength saline
polyethylene glycol
22% bovine albumin
Anti human globulin
After adding IgG coated RBC (check cells) to a negative AHG rxn during antibody screen, a negative result is observed. which of the following is the correct interpretation?
The antibody screen is negative
The antibody screen needs repeated
the saline washings were adequate
the antibody screen is positive
The antibody screen needs repeated
