Pre-transufusion/Comparibility Testing Flashcards
What is considered evidence of incompatibility?
Agglutination or hemolysis
What is the primary purpose of a crossmatch?
Prevent a transfusion reaction
Provide safe, compatible blood
What is the second purpose of compatibility testing?
Select blood products with acceptable survival rates
What is responsible for 47% of clerical errors?
Misidentification of recipient or blood at bedside
What are some examples of clerical errors?
Blood sample draw
Mix up of samples
Misidentification
How old should fresh serum/plasma be?
Less than 3 days old
What is the specimen requirement(s) for neonates (less than 4 months)?
Use serum/plasma of mother AND infant for initial testing
Is Type and Screen considered routine or emergency?
Routine procedure
What is considered routine and/or emergency?
Type and Crossmatch
What must we ALWAYS do on a positive antibody screen?
Perform an AHG crossmatch
What is the most common bacterial contaminant?
Yersinia Enterocolitica
What alternatives can we use for whole blood?
NONE
What are the suitability requirements for labeling donor units?
NO ABO/Rh discrepancies
No detectable antibodies
Nonreactive viral marker
Nonreactive Syphilis
What is the final check on ABO blood group compatibility?
Crossmatching
What does the AABB NOT require before transfusing a blood unit to patients?
Repeating weak D testing
What is the primary objective of a crossmatch?
Detect recipient antibodies
In extreme cases, what can we do when there is no time to do pretransfusion testing?
Use O Neg blood
When transfusing non group specific blood, what MUST we do to the serum?
Test for unexpected anti-A or anti-B
What is required before transfusing blood for neonates?
Confirming that maternal antibodies are compatible with infants circulation
For massive transfusions, how many RBC units are transfused per hour and 24 hours?
8 - 10 units in 24 hrs
4 - 5 units in 1 hour
What kind of blood must be tested by the collecting facility and does NOT require unexpected antibody or transmissible disease testing?
Preoperative Autologous Blood
What was the Maximum Surgical Blood Ordering Schedule (MSBOS) developed for?
To promote more efficient utilization of blood
