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Terry Kotrla, MS, MT(ASCP)BBMLAB 2431 Immunohematology
Unit 1 Part 2 Blood Collection
Blood Collection
Collection of BloodCollection performed by well trained
personnel.Materials used are FDA approved sterile
and single use.Donor identification critical
Identify donor record with donorAttach numbered labelsLabel processing tubesFinal recheck before leaving donor
Preparing SiteInspect BOTH arms for signs of IV drug abuse.Select large firm vein in area free of scarring or
skin lesions.Vein selection priority same as for routine
phlebotomy.Most important step is preparing the site to a
state of almost surgical cleanliness.Bacteria on skin, if present, may grow well in
stored donor blood and cause a fatal sepsis in recipient
Blood CollectionGloves are optional, OSHA provides specific
exemption for drawing volunteer donors.Gloves should be worn:
By personnel in trainingCollecting autologous unitsIf employee has cuts, scratches or breaks in skin.
Use 16-17 gauge needle to collect blood from a single venipuncture within 10 minutes.
First 30 to 45 mLs of blood diverted to pouch to collect skin plug.
Mix blood bag frequently or use shaker.Collect 450 or 500 mLs +/- 10% of blood
Blood Collection System
Donor ReactionsSyncope (fainting)
Remove needle immediatelyHyperventilation
Have donor rebreathe into paper bag.Nausea/vomitingTwitching/muscle spasmsHematomaUpper extremity deep vein thrombosisConvulsions – rare, get immediate
assistanceCardiac difficulties – get emergency careRecord ANY donor reactions
Post-Phlebotomy CareDonor applies pressure for 5 minutes with
arm elevated.Check and bandage siteHave donor sit up for few minutesHave donor report to refreshment area for
additional 15 minutes of monitoring
Post-Phlebotomy InstructionsEat/drink before leavingWait until staff releases youDrink more fluids next 4 hoursNo alcohol until after eatingRefrain from smoking for 30 minutes.If bleeding continues apply pressure and raise
armFaint or dizzy sit with head between kneesAbnormal symptoms persist contact blood
center.Cautions about returning to work.Let them know when to remove bandage
Post-Phlebotomy InstructionsIn canteen provide donor refreshments and
watch for signs of a reaction.Provide phone number for donor to call if:
bleeding recursfeels donated unit should not be usedhas any type of reaction.experiences signs or symptoms of infection.
THANK DONOR
Processing Donor BloodAll reagents used for testing must meet or
exceed appropriate FDA regulations.CANNOT rely on previous testingResults recorded immediately.Record system to track unit to final
disposition.Records must be retrievable.Records must be kept for 5 years OR 6 months
after product expires.
General ConsiderationsNumbers on blood bag, processing
tubes and donor records should be rechecked prior to processing.
ABO group and D type, including weak DDonor with history of transfusion or
pregnancy should be tested for unexpected antibodies.
Serological TestingABO/D typingAntibody Screen – if positive, ID antibody,
cannot make plasma productsAntibodies to other blood group antigens
which are present in the donor may react with recipient red cells resulting in a reaction.
Infectious Disease Testing MethodsELISA to detect antigens or antibodiesChemiluminescent to detect antigens or
antibodiesDetection of syphilis antibodies by RPRNucleic Acid Test (NAT) detects viral nucleic
acids, much more sensitive, reduces window periodHIV from 22 to 12 daysHCV from 70 to 10-14 days
Antigen, antibody and NAT testing will allow positive results through out disease process.
Disease Testing
Disease testing include: Dectection of bacteriaHBsAG Anti-HBcAnti-HCVAnti-HIV 1&2Anti-HTLV I/IIRPRChagas disease
antibodiesNAT for
HIV-1, HCV WNV
Results of TestingTests for disease markers must be negative
or within normal limits.Donor blood which falls outside these
parameters must be quarrantined.Repeat testing, if still abnormal must
dispose.
Optional TestsCMV testing
CMV devastating to premature infants and immunocompromised
Removing leukocytes greatly reduces risk.Some physicians still request CMV negative for
select patientsSpecial antigen typing
Patients may develop antibodies against other RBC antigens.
Test donors to find antigen negativeSickle cell testing
Exchange transfusionSickle trait may sickle in neonates
Labeling Donor Units Component name Unique donor number ABO group, D type (not required for plasma) Interpretation of tests Type and volume of anticoagulant. Storage temperature Expiration date Name/address of collecting facility Reference to Circular of Information -
http://www.aabb.org/Content/About_Blood/Circulars_of_Information/
Donor classification Results of testing Essential instructions Pooled component information
Transfusion Service TestingThe only repeat testing required is:
ABO on red cell productsD typing (IS) on D negative red cell products
Plasma products (FFP, CRYO, PLTS) do not require any testing.
Donor samples must be stored at 1-6C for at least 7 days after transfusionADSOL unit transfused today must save sprig for 7
days post-transfusion.Many facilities will pull a sprig from each donor during
processing and save all sprigs for 49 days, regardless of expiration of unit
Red Cell Unit With Sprigs
Summary Blood collection starts with screening of the donor to:
Ensure they are healthy enough to donateEnsure they do not have transmissible diseases
Many organizations involved in setting standards and monitoring all aspects of blood collection and administration.
Collection of blood must be done in such a manner as to ensure sterility of the component.
Testing of donor blood includes serological testing for ABO/D typing, antibody screening and testing for infectious disease markers.
The blood supply is NOT safe, only careful screening and testing can prevent, as much as possible, disease transmission.
ReferencesAABB Technical Manual 16th editionhttp://www.fda.gov/cber/dhq/dhq.htm