Donor Screening and Component Preparation Flashcards
What is the minimum age for donating blood?
17 years
What is the minimum weight requirement for donating a standard unit of blood?
110 pounds
A potential donor yields a blood pressure of 190/100 while undergoing a physical examination. What is the result of this finding?
Evaluation by blood bank medical director
A person comes in to donate a unit of blood, and when the donor rolls up his sleeve for a blood pressure reading, the donor room technician notices a tattoo. When asked about the time the tattoo was made the donor answers, “five years ago.” Is this donor approved for a blood donation?
Donor is accepted
A multiparous woman wishing to donate blood states she was given a blood transfusion 6 months ago during a difficult delivery of her third child. Is she approved for donation?
Donor is deferred for 6 months
What effect does aspirin have on a platelet pheresis procedure?
Causes a decrease in platelet function
Why might a donor with a history of epileptic seizures be deferred or might otherwise require approval from the blood bank director?
To alleviate the possibility of serious donor reaction
The influenza (live virus) carries a deferral of how long?
2 weeks
What possible disease transmission is the cause for rejecting a donor given growth hormone?
Creutzfeldt-Jakob disease
Why is the informed consent response not reviewed at the donor registration site, but instead in donor processing where blood pressure, temperature, hemoglobin, etc. screening is done?
to alleviate any embarrassment of the donor to other donors and staff.
All of the following are measured after pheresis donation except:
Serum protein
Mrs. Jones donated 2 autologous units for a hysterectomy to be performed in 4 weeks. This is referred to as a ______ donation.
Predeposit
What oral therapy is recommended for patients who are making frequent predeposit blood donations?
Iron
What type of blood donation is used particularly with cardiopulmonary bypass procedures?
Immediate preoperative hemodilution
What is the cause of a hematoma in the phlebotomy process?
The needle has gone through the vein and punctured the back wall
In processing of donor units, what reagent is optional?
A2 cells
All of the following are laboratory methods used to detect HBsAg except:
HPLC
What does anti-HBc detect?
The core protein on the Hepatitis B virus
All of the following is included on the label affixed to the donor unit, except:
Date of collection
How are red blood cells prepared from a donor whole blood unit?
80% plasma is removed
Red blood cells that have been irradiated are indicated in _______ patients.
Bone marrow transplant patients
Which leukocyte-reduction method yields the highest reduction in white blood cells and platelets?
Selective absorption filter
All of the following tests are done on postdeglycerolized units except:
IAT
Single-donor platelets are produced by:
Pheresis procedures
Random platelets from whole blood must be prepared within how long of collection?
6 hours
What is the storage temperature of fresh frozen plasma (FFP)?
-18 degrees C
What is the concentration of AHF (factor VIII) in cryoprecipitate?
80 units of activity
What may cause a decreased factor VIII activity when preparing cryoprecipitate?
elevated temperatures (>4 degrees C)
What product is used to treat persons at risk for spontaneous thrombosis?
Antithrombin III concentrate
What is the primary immunoglobulin contained in immune serum globulin (ISG)?
IgG
What is the therapeutic use of immune serum globulin (ISG)?
Immunodeficiency
