Bloodbank exam 3
Below are the results of the history obtained from a prospective female blood donor: Age: 16 Temperature: 99.0 F Hct: 36% History: tetanustoxoid immunization 1 week previously How many of the above results exclude this donor from giving blood for a routine transfusion?
1, Hct must be >38%
To qualify as a donor for autologous transfusion a patient;s hemoglobin should be at least ____________.
11 g/dL
The minimum hemoglobin concentration in a fingerstick from a male blood donor is __________________.
12.5 g/dL
For apheresis donors who donate platelets more frequently than every 4 weeks, a platelet count must be performed prior to the procedure and be at least _______________.
150 x 10^3/ microliter
Which of the following prospective donors would be accepted for donation?
22-year-old college student who has a temperature of 99.2F and states that he feels well, but is nervous about donating
A type and screen was performed on a 32-year old woman, and the patient typed as AB negative. There are no AB-negative units in the bloodbank. What should be done?
Check inventory of A-, B-, and O- units
Screening cells and major crossmatch are positive on IS only, and the autocontrol is negative. Identify the problem.
Cold alloantibody
An emergency trauma patient requires transfusion. Six units of blood are ordered stat. There is no time to draw a patient sample. O-negative blood is released. When will compatibility testing be performed?
Compatibility testing will be performed when a patient sample is available
A donor was found to contain anti-K using pilot tubes from the collection procedure. How would this affect the compatibility test?
Compatibility testing would not be affected
Which of the following constitutes permanent rejection status of a donor?
Confirmed positive test for HBsAg 10 years previously
During the preparation of Platelet Concentrates from Whole Blood, the blood should be _________.
Cooled toward 20-24C
All donor blood testing must include ______________.
Serological test for syphilis
According to AABB standards, which of the following donors may be accepted as a blood donor?
Spontaneous abortion at 2 months pregnancy, 3 months previously
How would autoantibodies affect compatibility testing?
ABO, Rh, antibody screen, and crossmatch may show abnormal results
Screening cells, major crossmatch, and patient autocontrol are positive in all phases. Identify the problem.
Abnormal protein or non-specific autoantibody
The test that is currently used to detect donors who are infected with the AIDS virus is ___________.
Anti-HIV 1,2
The Western blot is a confirmatory test for the presence of __________.
Anti-HIV-1
A panel study has revealed the presence of patient alloantibodies. What is the first step in a major crossmatch?
Antigen type patient cells and any donor cells to be crossmatched
An incompatible donor unit is found to have a positive DAT. What should be done with the donor unit?
Discard the unit
Six units are crossmatched. Five units are compatible, one unit is incompatible, and the recipient's antibody screen is negative. Identify the problem.
Donor unit may have a positive DAT
A commonly used screening method for anti-HIV-1 detection is ____________.
Enzyme labeled immunosorbent assay (ELISA)
When platelets are stored on a rotator set up on an open bench top, the ambient air temperature must be recorded _______________.
Every 4 hours
Which of the following is the correct storage temperature for the component listed?
Fresh frozen plasma (FFP), -20C
The most common cause of postransfusion hepatitis can be detected in donors by testing for _________.
HBsAg
An antibody screen is reactive at IAT phase of testing using a three-cell screen and the autocontrol is negative. What is a possible explanation for these results?
High-frequency alloantibody or a mixture of alloantibodies
A cause for permanent deferral of blood donation is ___________.
History of jaundice of uncertain cause
Of the following blood components, which one should be used to prevent HLA alloimmunization of the recipient?
Leukocyte-reduced red blood cells
Rejuvenation of a unit of Red Blood Cells is a method used to _____________.
Restore 2,3-DPG and ATP to normal levels
What ABO types may donate to any other ABO types?
O negative
What types of red cells are acceptable to transfuse to an O-negative patient?
O negative
Prior to blood donation, the intended venipuncture site must be cleaned with a scrub solution containing __________.
PVP iodine complex
What does a minor crossmatch consist of?
Recipient red cells and donor plasma
A unit of packed cells is split into 2 aliquots under closed sterile conditions at 8am. The expiration date for each aliquot is now ____________.
The original date of the unsplit unit
Which of the following is not a requirement for the electronic crossmatch?
There are concordant results of at least one determination of the recipient's ABO type on file
Leukocyte-Reduced Red Blood Cells are ordered for a newly diagnosed bone marrow candidate. What is the best way to prepare this product?
Transfuse through a Log3 leukocyte-removing filter
Can crossmatching be performed on October 14th using a patient sample drawn on October 12th?
Yes, a new sample would not be needed
