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Test Bank- UAMS MLS Exam Question and Answers [100% Correct] 2024/2025 Latest Release!!
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Test Bank- UAMS MLS Exam Question and Answers [100% Correct] 2024/2025 Latest Release!! **ABY most associated with delayed hemolytic transfusion reactions** Anti-Jk a **ABY associated with Mycoplasma pneumonia** Anti-I **Antibodies causing extravascular hemolysis due to sequestrat...

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  • October 20, 2024
  • 53
  • 2024/2025
  • Exam (elaborations)
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  • test bank uams mls exam question and answers 10

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Test Bank- UAMS MLS Exam Question
and Answers [100% Correct] 2024/2025
Latest Release!!
**ABY most associated with delayed hemolytic transfusion reactions**

Anti-Jk a



**ABY associated with Mycoplasma pneumonia**

Anti-I



**Antibodies causing extravascular hemolysis due to sequestration by the spleen**

IgG



**Which antibodies will not react in an enzyme panel?**

Duffy antibodies (Fya or Fyb)



**How long does a unit of blood remain usable after being entered?**

24 hours



**Storage temperatures for components**

- **Red cells:**

CPDA: 35 days

Adsol: 42 days

Storage temperature: 1-6°C



- **Whole blood with CPDA-1:**

1-6°C for 35 days


1

,**Blood transfusions for infants should be...**

Less than 7 days old



**Irradiated RBCs must be used within what timeframe?**

28 days or until the expiration date, whichever comes first.



**Why is blood leukoreduced?**

To prevent febrile transfusion reactions.



**Storage temperatures for components**

- **Platelets (PLTs):**

Room temperature (20-24°C)

5 days with continuous agitation; transfuse within 4 hours of pooling



- **White blood cells (WBCs):**

20-24°C for 24 hours



- **Fresh frozen plasma (FFP):**

Frozen at -18°C for 1 year; usable for 24 hours after thawing



- **Cryoprecipitate (Cryo AHF):**

Stored at -18°C for one year



- **AHF or factor VIII concentrate:**

Usable for 24 hours after thawing at 1-6°C (room temperature for VIII)



**Administer VIII and fibrinogen within...**


2

, 4 hours after pooling.



**True/False: RhIG at 28 weeks can cause the mother to have low titer anti-D.**

True



**True/False: Blood from mother to child must be irradiated.**

True



**True/False: 37°C crossmatch is required to detect ABO errors.**

False (Room temperature)



**Premature infants primarily require transfusions due to...**

Blood loss from laboratory tests.



**True/False: When phenotyping, use a positive control that is homozygously positive.**

False (Use a heterozygously positive control to show weak reactions)



**Rouleaux and cold auto will make the auto control positive. How can this be distinguished?**

Distinguish by warming the sample, examining under a microscope, or performing saline
replacement.



**What will react with polyspecific AHG and C3 monospecific AHG?**

Cold auto antibodies



**Cryoprecipitate is primarily used today to replace what?**

Fibrinogen



**True/False: AB= patient can only receive AB plasma (+ or =).**



3

, True



**What must be done to intrauterine transfusions?**

They must be fresh, CMV-negative, irradiated, and collected with CPDA.



**Which component is used when PT and PTT are prolonged?**

FFP (Fresh Frozen Plasma)



**True/False: Lewis antibodies react at room temperature and sometimes at 37°C and cause in vitro
hemolysis.**

True



**How long is the sexual partner of an IV drug user deferred from donating?**

One year



**If a patient has antibodies to A, B, A,B, and H but types as O, what is suspected? How is it resolved?**

Suspected: Bombay phenotype.

Resolution: Test with anti-H lectin (Bombay individuals will not react since they lack H antigens).



**If a patient forward types as B and backtypes as A, what is suspected? How is it resolved?**

Suspected: Acquired B phenomenon.

Resolution: Patient is typically type A1 with GI issues where bacteria alter RBC antigens.
Autologous testing shows that the patient's anti-B will not react with the acquired B antigen on their
RBCs.



**If a patient forward types as a weak A, has a weak reaction with anti-A1, and a strong reaction with
anti-AB, while showing no reaction with anti-A1 lectin, what is suspected? How is it resolved?**

Suspected: Patient with anti-A1.

Resolution: Type with A2 cells (+ indicates NOT A2; = indicates it is A2).


4

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