Test 2 Flashcards

1
Q

What are 3 antigens in the P group?

A

P1, P2, and Pk

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2
Q

What antigens do you have if you are a P1 phenotype?

A

All three P antigens

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3
Q

What antigens do you have if you are a P2 phenotype?

A

P and Pk (missing P1)

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4
Q

What does it mean if you have the null phenotype for the P system?

A

You do not carry the P1, P2, or Pk

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5
Q

What antibodies are naturally occurring in Pnull people?

A

Anti-P1, Anti-P2, and Anti-Pk

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6
Q

Is Anti-P1 naturally occurring? And what kind of people can this antibody be found in?

A

Yes and P2 people

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7
Q

Is Anti-P1 IgG or IgM?

A

IgM (cold reacting)

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8
Q

Can Anti-P1 bind with complement?

A

Yes

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9
Q

Individuals negative for the I antigen are labeled?

A

i

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10
Q

After you’re born, i converts to I antigen. This process is usually complete by?

A

18 months

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11
Q

Is Anti-I clinically significant?

A

No

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12
Q

Is Anti-I IgM or IgG?

A

IgM (cold reacting)

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13
Q

In the MNS system, what genes are allelic to each other?

A

M and N

S and s

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14
Q

Is anti-M IgM or IgG?

A

IgM (cold reacting)

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15
Q

Is Anti-M naturally occuring?

A

Yes

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16
Q

Does Anti-M bind complement?

A

No

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17
Q

Does Anti-M exhibit a dosage effect?

A

Yes

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18
Q

Is Anti-N IgM or IgG, naturally occuring, bind with complement, exhibit dosage effects?

A

IgM, and yes it is naturally occurring, binds with complement, and exhibits dosage effects.

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19
Q

Is Anti-S and Anti-s naturally occuring?

A

No, RBC stimulated through transfusion of pregnancy.

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20
Q

Is Anti-S and Anti-s IgM or IgG?

A

IgG (warm reacting 37 degrees)

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21
Q

Why is Anti-U clinically significant and what race is it seen in?

A

Associated with HDFN and HTR (Hemolytic Transfusions Reactions) and African Americans

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22
Q

How many antigens does the Kell system contain?

A

24

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23
Q

What is Ku or Total Kell?

A

Represents all Kell antigens collectively

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24
Q

What is Ko (Kell null)?

A

Lacks entire Kell glycoprotein and all Kell antigens

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25
What are the antigens for Fisher-Race?
D, C, E, c, e
26
What are the antigens for Wiener?
R1, R2, R0, Rz, r', r'', ry
27
What is the clinical significance of a weakened D person who has donated blood?
The donor is considered positive for the D antigen.
28
What is the clinical significance of a weakened D person who is going to receive blood?
That person should receive D negative blood because they are considered weakly positive for D.
29
When is anti-human globulin used?
During IAT and DAT testing to detect antibodies in serum (IAT) or detect coating of RBCs with antibodies (DAT).
30
List the antigens/antibodies for the ABO blood group.
A1, A2, B (Antigens) | Anti-A, Anti-B, Anti-A1, Anti-A,B, Anti-H (Antibodies)
31
List the antigens/antibodies for the Rh blood group.
D, C, E, c, e (Antigens) | Anti-D, Anti-C, Anti-E, Anti-c, Anti-e (Antibodies)
32
List the antigens/antibodies for the Kell blood group.
K, k, Kpa, Kpb, Kpc, Jsa, Jsb (Antigens) Anti-K, Anti-k, Anti-Kpa, Anti-Kpb, Anti-Kpc, Anti-Jsa, Anti-Jsb (Antibodies)
33
List the antigens/antibodies for the Kidd blood group.
Jka, Jkb (Antigens) Anti-Jka, Anti-Jkb (Antibodies)
34
List the antigens/antibodies for the Duffy blood group.
Fya, Fyb (Antigens) Anti-Fya, Anti-Fyb (Antibodies)
35
List the antigens/antibodies for the Lutheran blood group.
Lua, Lub (Antigens) Anti-Lua, Anti-Lub (Antibodies)
36
List the antigens/antibodies for the P blood group.
P1, P, PK (Antigens) Anti-P, Anti-P1, Anti-Pk (Antibodies)
37
List the antigens/antibodies for the I blood group.
I (Antigen) Anti-I, Anti-i (Antibody)
38
List the antigens/antibodies for the MNS blood group.
M, N, S, s, U (Antigens) Anti-M, Anti-N, Anti-S, Anti-s, Anti-U (Antibodies)
39
List the antigens/antibodies for the Lewis blood group.
Lea, Leb (Antigens) Anti-Lea, Anti-Leb (Antibodies)
40
What is the purpose of a DAT (Direct Antiglobulin Test)?
Detect sensitized cells in vivo
41
Define DAT.
Direct Antiglobulin Test
42
What is the reagent for Anti-Human Globulin?
Antibody to human globulin
43
What percentage of people are Rh+?
85%
44
Most common Lewis phenotype?
Le (a-b+)
45
Most common P phenotype?
P1
46
Most common Kell phenotype?
kk (small k) | K-k+
47
Most common Duffy phenotype in whites?
Fy (a+b+)
48
Most common KIDD phenotype in blacks?
Jk (a+b-)
49
Three causes of a false positive DAT.
- Complement (EDTA tube was not used and complement was not inactivated) - Improper centrifugation (cells too tight, not easily dispersed) - Cells agglutinated prior to washing
50
List Ig class, best reaction temperature, and phase of ABO blood group antibodies.
IgM 22-24 degrees Celsius Not IAT
51
Ig class, best reaction temperature, and phase of Rh blood group antibodies.
IgG 37 degrees Celsius IAT
52
Ig class, best reaction temperature, and phase of Kell blood group antibodies.
IgG 37 degrees IAT
53
Ig class, best reaction temperature, and phase of Kidd blood group antibodies.
IgG 37 degrees IAT
54
Ig class, best reaction temperature, and phase of Duffy blood group antibodies.
IgG 37 degrees IAT
55
Ig class, best reaction temperature, and phase of Lutheran blood group antibodies.
IgM 22-24 degrees Not IAT
56
Ig class, best reaction temperature, and phase of I blood group antibodies.
IgM 4-22 degrees Not IAT
57
Ig class, best reaction temperature, and phase of MNS blood group antibodies.
IgG 37 degrees IAT
58
Ig class, best reaction temperature, and phase of Lewis blood group antibodies.
IgM 4-22 degrees Not IAT
59
DCe
R1
60
DcE
R2
61
Dce
R0
62
DCE
Rz
63
ce
r
64
Ce
r'
65
cE
r''
66
CE
ry
67
Three causes of false negative DATs.
- Neutralization of AHG reagent - Improper procedures (too heavy rbc concentration, improper cells) - Interruption in testing
68
What is the CIS effect?
Genes in the sis position are on the same chromosome of a pair of homologous chromosomes.