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12 Cards in this Set
- Front
- Back
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Define compatibility testing
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- includes all steps from initial sample collection, to the final issuing and transfusion of the blood
- includes the testing of the donor units which will be transfused. |
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Define Crossmatch
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Consists of combining receipient plasma with sample of donor rbcs to look for signs of incompatibility
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Major and Minor Crossmatch
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Major: donor rbc/pt plasma
Minor: donor plasma/pt rbc |
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What are the purposes of crossmatch?
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1) to prevent transfusion rxn
2) to maximize survival of transfused rbcs |
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Procedure in routine campatibility testing.
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1) sample collection and receipt
2) previous record check 3) ABO,Rh,Ab screen 4a) if negative (to 5) 4b) if positive, ab ID and donor phenotyping 5) XM (CBS tested) 6) issue and transfuse |
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How does XM prevent transfusion reaction?
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1) provides a double check to catch any ABO errors
2) provides an additional check for alloantibodies in pt plasma |
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Why use plasma instead of serum?
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plasma is quicker
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explain 72 hour rule.
exception. maximum limit |
new sample is required every 3 days.
except as long as pt has no known abs, no recent trasfusion or pregnancy 3 months |
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What are 3 types of XM?
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1) Full AHG
2) Immediate Spin 3) Computer (electronics) |
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What is massive transfusion?
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total volume exchange of blood within 24 hour period
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How much blood is transfer in massive transfusion?
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~6L
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What is a disadvantage of using Immediate Spin method for Crossmatching.
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doesn't catch incompatibilities other than ABO and Rh
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