Question 1

How many units of red blood cells are required to raise the hematocrit of a 70-kg nonbleeding adult man from 24% to 30%?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
A) 1 
B) 2 
C) 3 
D) 4 B

Question 2

The use of the electronic (computer)crossmatch is restricted to recipients who:

Accepted Answer

A) are group O. 
B) do not have a clinically significant antibody. 
C) have had successful transfusions in the past. 
D) have transfusion history that has been documented in the computer. 
A) are group O. 
B) do not have a clinically significant antibody. 
C) have had successful transfusions in the past. 
D) have transfusion history that has been documented in the computer. B

Question 3

Which of the following blood products requires a crossmatch to be performed before issuing?

Accepted Answer

A) Group AB fresh frozen plasma that is transfused to a group O 
B) Human leukocyte antigen-matched platelets 
C) Cryoprecipitated AHF 
D) Granulocyte concentrates that have more than 2 mL of red blood cells 
A) Group AB fresh frozen plasma that is transfused to a group O 
B) Human leukocyte antigen-matched platelets 
C) Cryoprecipitated AHF 
D) Granulocyte concentrates that have more than 2 mL of red blood cells D

Question 4

When type O blood is not available for transfusion for a type O recipient,what is the next alternative?

Accepted Answer

A) Group A red blood cells 
B) Group AB red blood cells 
C) Washed group B red blood cells 
D) None 
A) Group A red blood cells 
B) Group AB red blood cells 
C) Washed group B red blood cells 
D) None

Question 5

To increase the sensitivity of the antibody screen in a compatibility test,what can be done?

Accepted Answer

A) Extend the incubation time. 
B) Increase the serum-to-cell ratio. 
C) Use an enhancement such as polyethylene glycol. 
D) All of the above are correct. 
A) Extend the incubation time. 
B) Increase the serum-to-cell ratio. 
C) Use an enhancement such as polyethylene glycol. 
D) All of the above are correct.

Question 6

An infant less than 4 months old requires which procedures for compatibility testing?

Accepted Answer

A) Antibody screen with each unit released in a 48-hour period 
B) ABO and D typing and antibody screen initially only;units released without additional testing if the screen is negative 
C) Immediate spin crossmatch with each unit released 
D) Group O,D-negative units;no testing is necessary 
A) Antibody screen with each unit released in a 48-hour period 
B) ABO and D typing and antibody screen initially only;units released without additional testing if the screen is negative 
C) Immediate spin crossmatch with each unit released 
D) Group O,D-negative units;no testing is necessary

Question 7

For autologous units transfused within the collection facility,which part of the compatibility procedure is not required?

Accepted Answer

A) ABO phenotyping 
B) D phenotyping 
C) Antibody screen 
D) Transfusion history check 
A) ABO phenotyping 
B) D phenotyping 
C) Antibody screen 
D) Transfusion history check

Question 8

To what does the abbreviation "MSBOS" refer?

Accepted Answer

A) Monthly surgical blood order schedule 
B) Minimum surgical blood order staffing 
C) Maximum blood order schedule 
D) Minimum safe blood order schedule 
A) Monthly surgical blood order schedule 
B) Minimum surgical blood order staffing 
C) Maximum blood order schedule 
D) Minimum safe blood order schedule

Question 9

All of the following may be used to perform an antibody screen for an infant less than 4 months old except:

Accepted Answer

A) infant serum. 
B) paternal serum. 
C) maternal serum. 
D) infant eluate. 
A) infant serum. 
B) paternal serum. 
C) maternal serum. 
D) infant eluate.

Question 10

In which phase of reactivity would rouleaux typically be detected in the screen?

Accepted Answer

A) 4$\circ$ C 
B) 15$\circ$ C 
C) 37$\circ$ C 
D) Antihuman globulin 
A) 4$\circ$ C 
B) 15$\circ$ C 
C) 37$\circ$ C 
D) Antihuman globulin

Question 11

A 29-year-old female was admitted to the emergency room with severe bleeding.The blood type was tested and determined to be AB,D negative.Six units of RBCs are ordered STAT.Of the following types available in the blood bank,which would be the most preferable for crossmatch?

Accepted Answer

A) AB,D positive 
B) A,D negative 
C) A,D positive 
D) O,D negative 
A) AB,D positive 
B) A,D negative 
C) A,D positive 
D) O,D negative

Question 12

A group O patient was crossmatched with group B red blood cells.What phase of the crossmatch will first detect this incompatibility?

Accepted Answer

A) Immediate spin 
B) 37$\circ$ C low-ionic strength solution 
C) Indirect antiglobulin 
D) None of them;unit is compatible 
A) Immediate spin 
B) 37$\circ$ C low-ionic strength solution 
C) Indirect antiglobulin 
D) None of them;unit is compatible

Question 13

Antibodies detected in the immediate spin crossmatch are usually of which of the following immunoglobulin classes?

Accepted Answer

A) IgA 
B) IgM 
C) IgG 
D) IgD 
A) IgA 
B) IgM 
C) IgG 
D) IgD

Question 14

How long following transfusion must the recipient's sample be stored?

Accepted Answer

A) 5 days 
B) 7 days 
C) 10 days 
D) 14 days 
A) 5 days 
B) 7 days 
C) 10 days 
D) 14 days

Question 15

What are the two components of the major crossmatch?

Accepted Answer

A) Recipient red cells and donor serum 
B) Donor red cells and recipient serum 
C) Reverse ABO cells and recipient serum 
D) Screening cells and donor serum 
A) Recipient red cells and donor serum 
B) Donor red cells and recipient serum 
C) Reverse ABO cells and recipient serum 
D) Screening cells and donor serum

Question 16

The immediate spin or abbreviated crossmatch is an acceptable procedure if the recipient:

Accepted Answer

A) has no prior or existing clinically significant antibodies. 
B) has never been pregnant or transfused. 
C) needs blood before a sample can be obtained. 
D) is using blood from a directed donation. 
A) has no prior or existing clinically significant antibodies. 
B) has never been pregnant or transfused. 
C) needs blood before a sample can be obtained. 
D) is using blood from a directed donation.

Question 17

Which of the following tests is not included in routine compatibility testing?

Accepted Answer

A) ABO phenotyping 
B) Direct antiglobulin test 
C) D typing 
D) Antibody screen 
A) ABO phenotyping 
B) Direct antiglobulin test 
C) D typing 
D) Antibody screen

Question 18

A recipient phenotypes as group O with the following Rh phenotype: D+C+c-E+e+.If this recipient is transfused with red blood cells from six random group O D-positive donors,what Rh alloantibody could this patient produce as a result of transfusion?

Accepted Answer

A) Anti-E 
B) Anti-C 
C) Anti-c 
D) Anti-D 
A) Anti-E 
B) Anti-C 
C) Anti-c 
D) Anti-D

Question 19

Given the following red cell antigen frequencies: K 10%
E 30%
K 90%
P1 80%
Which of the following red cell alloantibodies would be responsible for incompatible crossmatches with one 1 of 10 random donor units?

Accepted Answer

A) Anti-K 
B) Anti-E 
C) Anti-k 
D) Anti-P1 
A) Anti-K 
B) Anti-E 
C) Anti-k 
D) Anti-P1

Question 20

A donor unit with a positive DAT would cause reactions at what phase of the crossmatch?

Accepted Answer

A) Immediate spin 
B) Antiglobulin 
C) None;it would be compatible 
D) All phases 
A) Immediate spin 
B) Antiglobulin 
C) None;it would be compatible 
D) All phases

How many units of red blood cells are required to raise the hematocrit of a 70-kg nonbleeding adult man from 24% to 30%?

The use of the electronic (computer)crossmatch is restricted to recipients who:

Which of the following blood products requires a crossmatch to be performed before issuing?

When type O blood is not available for transfusion for a type O recipient,what is the next alternative?

To increase the sensitivity of the antibody screen in a compatibility test,what can be done?

An infant less than 4 months old requires which procedures for compatibility testing?

For autologous units transfused within the collection facility,which part of the compatibility procedure is not required?

To what does the abbreviation "MSBOS" refer?

All of the following may be used to perform an antibody screen for an infant less than 4 months old except:

In which phase of reactivity would rouleaux typically be detected in the screen?

A 29-year-old female was admitted to the emergency room with severe bleeding.The blood type was tested and determined to be AB,D negative.Six units of RBCs are ordered STAT.Of the following types available in the blood bank,which would be the most preferable for crossmatch?

A group O patient was crossmatched with group B red blood cells.What phase of the crossmatch will first detect this incompatibility?

Antibodies detected in the immediate spin crossmatch are usually of which of the following immunoglobulin classes?

How long following transfusion must the recipient's sample be stored?

What are the two components of the major crossmatch?

The immediate spin or abbreviated crossmatch is an acceptable procedure if the recipient:

Which of the following tests is not included in routine compatibility testing?

A recipient phenotypes as group O with the following Rh phenotype: D+C+c-E+e+.If this recipient is transfused with red blood cells from six random group O D-positive donors,what Rh alloantibody could this patient produce as a result of transfusion?

Given the following red cell antigen frequencies: K 10% E 30% K 90% P₁ 80% Which of the following red cell alloantibodies would be responsible for incompatible crossmatches with one 1 of 10 random donor units?

A donor unit with a positive DAT would cause reactions at what phase of the crossmatch?

Immunology: Basic Principles and Applications in the Blood Bank

Blood Banking Reagents: Overview and Applications

Genetic Principles in Blood Banking

Abo and H Blood Group Systems and Secretor Status

Rh Blood Group System

Other Blood Group Systems

Antibody Detection and Identification

Blood Bank Automation for Transfusion Services

Adverse Complications of Transfusions

Hemolytic Disease of the Fetus and Newborn

Donor Selection and Phlebotomy

Testing of Donor Blood

Blood Component Preparation and Therapy

Transfusion Therapy in Selected Patients

Quality Assurance and Regulation of the Blood Industry and Safety Issues in the Blood Bank

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Exam 8: Compatibility Testing

How many units of red blood cells are required to raise the hematocrit of a 70-kg nonbleeding adult man from 24% to 30%?

The use of the electronic (computer)crossmatch is restricted to recipients who:

Which of the following blood products requires a crossmatch to be performed before issuing?

When type O blood is not available for transfusion for a type O recipient,what is the next alternative?

To increase the sensitivity of the antibody screen in a compatibility test,what can be done?

An infant less than 4 months old requires which procedures for compatibility testing?

For autologous units transfused within the collection facility,which part of the compatibility procedure is not required?

To what does the abbreviation "MSBOS" refer?

All of the following may be used to perform an antibody screen for an infant less than 4 months old except:

In which phase of reactivity would rouleaux typically be detected in the screen?

A 29-year-old female was admitted to the emergency room with severe bleeding.The blood type was tested and determined to be AB,D negative.Six units of RBCs are ordered STAT.Of the following types available in the blood bank,which would be the most preferable for crossmatch?

A group O patient was crossmatched with group B red blood cells.What phase of the crossmatch will first detect this incompatibility?

Antibodies detected in the immediate spin crossmatch are usually of which of the following immunoglobulin classes?

How long following transfusion must the recipient's sample be stored?

What are the two components of the major crossmatch?

The immediate spin or abbreviated crossmatch is an acceptable procedure if the recipient:

Which of the following tests is not included in routine compatibility testing?

A recipient phenotypes as group O with the following Rh phenotype: D+C+c-E+e+.If this recipient is transfused with red blood cells from six random group O D-positive donors,what Rh alloantibody could this patient produce as a result of transfusion?

Given the following red cell antigen frequencies: K 10% E 30% K 90% P1 80% Which of the following red cell alloantibodies would be responsible for incompatible crossmatches with one 1 of 10 random donor units?

A donor unit with a positive DAT would cause reactions at what phase of the crossmatch?

Immunology: Basic Principles and Applications in the Blood Bank

Blood Banking Reagents: Overview and Applications

Genetic Principles in Blood Banking

Abo and H Blood Group Systems and Secretor Status

Rh Blood Group System

Other Blood Group Systems

Antibody Detection and Identification

Blood Bank Automation for Transfusion Services

Adverse Complications of Transfusions

Hemolytic Disease of the Fetus and Newborn

Donor Selection and Phlebotomy

Testing of Donor Blood

Blood Component Preparation and Therapy

Transfusion Therapy in Selected Patients

Quality Assurance and Regulation of the Blood Industry and Safety Issues in the Blood Bank

Filters

Given the following red cell antigen frequencies: K 10% E 30% K 90% P₁ 80% Which of the following red cell alloantibodies would be responsible for incompatible crossmatches with one 1 of 10 random donor units?