Question 1

How often can a person donate a unit of whole blood for a directed donation?

Accepted Answer

Directed donors must follow the same guidelines as allogeneic donors.

Question 2

During the donor screening process,the potential donor's blood drop sinks to the bottom of the copper sulfate solution within 15 seconds.What is the interpretation of this test?

Accepted Answer

Using the specific gravity of a copper sulfate solution is a screening method to determine whether the hemoglobin and hematocrit are within limits.If the blood drop does not sink within 15 seconds,the donor's hemoglobin or hematocrit should be verified with a more precise measurement.

Question 3

Blood collected from a therapeutic phlebotomy is:

Accepted Answer

The Food and Drug Administration requires a variance from the blood center to allow a blood unit from a donor with genetic hemochromatosis to be placed into inventory.

Question 4

Which of the following is not a cause for temporary deferment of a whole blood donor?

Accepted Answer

Aspirin is acceptable for whole blood donation.If platelets are prepared from the unit,they cannot be the sole source of platelets for a recipient (i.e. ,apheresis platelet).

Question 5

The purpose of a "diversion pouch" that is used when collecting blood from a donor is to:

Accepted Answer

A diversion pouch is used when collecting platelets by apheresis in order to avoid contamination of the platelet product with the initial blood that may contain bacteria from the skin.

Question 6

A 21-year-old college student wishes to participate in the "double red" program at the local blood center by donating red blood cells collected by apheresis.What is the minimum height and weight requirement that she must meet?

Accepted Answer

RBCs collected by apheresis must meet the FDA requirement of 5'5",150 lb for women and 5'1",130 lb for men.

Question 7

Which one of the following histories represents an acceptable donor? Hematocrit Blood Pressure (mm Hg)Temperature Pulse (beats/min)Age

Accepted Answer

A,Unacceptable temperature;B,unacceptable hematocrit;D,unacceptable blood pressure (blood pressure limits are defined by each donor center).

Question 8

Which of the following contributes to permanent rejection status of a donor?

Accepted Answer

A positive test for hepatitis B core antigen is a permanent deferral.

Question 9

Autologous donors may not donate if they:

Accepted Answer

A risk of bacteremia would cause the autologous donor to be deferred.

Question 10

A 58-year-old woman revealed that she had experimented with intravenous drugs as a teenager.What would be the acceptable deferral period,if any,for this potential donor?

Accepted Answer

Use of a needle to administer nonprescription drugs is an indefinite deferral.

Question 11

How long must a donor wait to donate red blood cells again following a 2-unit red blood cell apheresis donation?

Accepted Answer

A 16-week deferral period is required following a 2-unit red blood cell apheresis donation.

Question 12

Following donation,how long does it take to replace the fluid lost from giving whole blood?

Accepted Answer

Fluid replacement takes about 3 days.

Question 13

It is necessary to mix the unit frequently during the donation process to:

Accepted Answer

Mixing of the anticoagulant avoids clot formation in the unit.

Question 14

Below are the results of the medical screening for a prospective donor: Age: 16
Hematocrit: 35%
Temperature: 37.2° C
History: HPV immunization,1 week ago
How many of the above results would exclude this donor from donating?

Accepted Answer

Hematocrit level must be 38% or above.Temperature is acceptable (<37.5° C)and toxoid immunization has no deferral.

Question 15

Allogeneic whole blood donors may donate every __________ days.

Accepted Answer

Whole blood donation is restricted to every 56 days.

Question 16

Which type of autologous donation procedure is the most common for most types of surgery?

Accepted Answer

Donating blood for surgery is typically a preoperative donation.

Question 17

What is the minimum hemoglobin level for a potential allogeneic donor?

Accepted Answer

Minimum hemoglobin is 12.5 g/dL for both male and female donors.

Question 18

If a prospective donor has participated in a plasmapheresis program,how long must he or she wait to donate whole blood?

Accepted Answer

Following apheresis procedures,there is a 48-hour deferral period.

Question 19

Following delivery,what is the deferral time for donating a unit of whole blood?

Accepted Answer

Pregnancy has a 6-week deferral time.

Question 20

Before donation,the intended venipuncture site must be cleaned with:

Accepted Answer

FDA guidelines require the arm to be cleaned with iodine compounds or in the case of sensitivity to iodine,alternate solutions are suggested in the AABB technical manual.

Quiz 12: Donor Selection and Phlebotomy