MEDT
479 - Clinical Immunohematology Practicum
updated
2/04 |
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Practicum Home
INVENTORY
AND PROCESSING
The student will assist
in obtaining and maintaining an appropriate inventory of blood and components.
She/he will gain experience in serologic testing, record keeping and component
storage. Upon completion of this unit, the student will be able to:
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Document and report inventory
levels to the blood supplier.
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Place orders for and/or coordinate
return of products based on established target inventory levels, anticipated
usage, product availability, and product expirations.
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Inspect donor units as received
into inventory and prior to issue according to defined criteria.
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Initiate quarantine and appropriate
documentation for any nonconforming product.
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Perform unit log-in/accessioning
of donor units.
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Perform confirmatory ABO and
Rh typing, as appropriate.
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Perform appropriate labeling
of donor units.
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ISSUING
AND PROPER USAGE OF BLOOD AND COMPONENTS
The student will learn and
assist in the proper issuance of blood and components. She/he will
learn to evaluate proper blood utilization based on criteria established
by the clinical facility. Upon completion of this unit, the student
will be able to:
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Perform all record keeping procedures
related to the issuance of blood and components for patient transfusion
including:
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Review of all patient and donor
unit identification names and numbers
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Visual inspection of units
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Documentation of unit disposition
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Discuss the return of products
following dispense with regard to acceptance criteria for reissue.
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State the procedure for the
emergency release of uncrossmatched blood.
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Select and pool platelets for
transfusion. Compare and contrast the storage conditions and expiration
time of the products prior to and after preparation for transfusion.
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Select and prepare fresh frozen
plasma for transfusion.
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Compare and contrast the storage
conditions and expiration time of the products prior to and after preparation
for transfusion.
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Select and prepare cryoprecipitate
for transfusion. Compare and contrast the storage conditions and
expiration time of the products prior to and after preparation for transfusion.
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Select appropriate red blood
cell products for transfusion and discuss how special requirements listed
below impact product selection:
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Leukoreduced
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Irradiated
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CMV Negative
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Hgb S Negative
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Antigen Negative.
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Explain why blood is irradiated
for selected patients.
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Identify which patient groups
should receive CMV Negative products.
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STORAGE
AND TRANSPORTATION OF BLOOD/COMPONENTS
It is important to remember
that for the blood and/or components to provide maximum benefit to the
recipient, the products must be maintained at the required temperature
on the shelf or during transport. Upon completion of this unit, the
student will be able to:
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Identify the different components
that can be prepared from a single whole blood donation.
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State the purpose and advantages
of collecting and tranfusing platelets prepared from an apheresis instrument.
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List the storage/transport conditions
required for each component following manufacturing.
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Identify the various packing
material designed to maintain appropriate temperature during transportation
of each product type.
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Explain how transportation temperatures
are periodically quality controlled.
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Discuss how continuous monitoring
of blood storage devices is conducted and documented.
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State the acceptable storage
temperature ranges for the following storage devices:
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Red cell refrigerators
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Plasma/Cryo freezers
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Platelet incubators
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Reagent refrigerators
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Discuss how required periodic
preventative maintenance is performed on each type of blood storage device.
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QUALITY
CONTROL/QUALITY ASSURANCE
The student will learn all
the various factors involved in quality control and quality assurance in
the blood bank and will perform routine daily quality control procedures.
Upon completion of this unit, the student will be able to:
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Differentiate between the terms
"Quality Assurance" and "Quality Control."
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Identify the key components
of the Blood Bank's Quality Plan.
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Define "control."
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Give examples of how controls
are used in Blood Bank testing.
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Perform daily reagent Quality
Control.
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Explain how quality is verified
and documented for critical equipment used in the blood bank laboratory.
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State the AABB standards for
the appropriate time interval records related to maintaining the following:
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Patient blood types
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Compatibility test record
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Units dispositions
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Patient antibody identifications
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List factors that can minimize
human errors and assure Personnel Quality Control.
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Differentiate between the terms
"Preventative Action" and "Corrective Action" as they relate to error management.
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SPECIMEN
ACCEPTABILITY/PRETRANSFUSION TESTING
The student will learn and
perform the various tests involved in compatibility testing. He/she
will also learn the follow-up procedures used when blood is incompatible.
Upon completion of this unit, the student will be able to:
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Evaluate specimens submitted
for pretransfusion testing with respect to defined labeling criteria, age
of specimen, appearance of specimen.
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Accurately perform and interpret
all serologic testing procedures required to provide compatible blood for
transfusion, including:
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ABO and Rh typing of patient
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Antibody screening
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Antibody identification
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Selection of appropriate donor
units for compatibility testing
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Crossmatch testing
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Recognize test reactions characteristic
of the following situations and suggest or perform correct follow-up procedures:
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ABO cell-serum grouping discrepancies
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Rouleaux
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Cold reactive auto and/or alloantibodies
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Single/multiple blood group
alloantibodies
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Warm autoantibodies
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Identify when weak D testing
must be performed as part of Rh typing (i.e. donor units, transfusion recipients,
prenatal patients, neonates).
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Given a patient sample with
one or more clinically significant antibodies, be able to perform the following:
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Accurately identify antibody
specificity(ies) with statistical confidence.
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Confirm identification by antigen
typing patient red cells.
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Determine the number of units
to select for antigen screening.
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Perform and document antigen
typing of selected donor units using appropriate controls.
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Accurately label donor units
as antigen negative.
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Given a specimen with a positive
DAT:
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Perform Direct Coombs testing
using appropriate polyspecific and monospecific AHG reagents.
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Evaluate DAT results relative
to patient diagnosis, medication, transfusion history.
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Perform an RBC elution when
indicated. Correctly identify antibody(ies) contained in an eluate.
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Discuss and interpret results
of special procedures for antibody testing/identification and resolution
of incompatibility, such as:
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REST absorption technique
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Enzyme treatment of RBCs
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W.A.R.M. autoabsorption
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Homologous adsorption
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Neutralization techniques for
Sda, Chido, Rogers antibodies
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Antibody titration procedures
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OBSTETRICAL
CONSIDERATIONS
The student will perform
and interpret tests on maternal blood samples as related to the issue of
RhIG products and recognition of potential HDN. Upon completion of
this unit, the student will be able to:
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Accurately determine the ABO
blood group and Rh type of maternal blood samples, and interpret the results.
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Recognize a mixed field weak
D test due to a feto-maternal bleed.
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Evaluate patient history and
test results to determine the need for:
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antepartum RhIG
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postpartum RhIG
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State the dose of RhIG in available
RhIG products.
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Perform a screening test for
a feto-maternal bleed and evaluate results.
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Perform and/or explain the principle
of a quantitative test for feto-maternal bleeds. In addition, from
case histories determine the fetal bleed and calculate the required dose
of RHIG.
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Evaluate the antibody screen
and antibody identification as to possible cause of HDN.
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Demonstrate proper technique
in performing an antibody titration.
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Interpret result as to titer
and score
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Recognize a significant change
in titer given a series of results on the same patient
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NEONATAL
TRANSFUSION PRACTICES
The student will receive
blood samples from neonates and perform tests as requested. He/she
will evaluate results and perform additional tests as indicated or directed
by physician or instructor. The student will assist in the selection
and preparation of blood and components requested for transfusion therapy
of neonates. Upon completion of this unit, the student will be able
to:
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Define the neonatal period.
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Demonstrate proper technique
when determining the ABO Blood Group, the Rh type, the Direct Antiglobulin
Test (DAT) on either cord blood, venous and/or capillary samples.
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Distinguish ABO Hemolytic Disease
of the Newborn (HDN) from HDN caused by maternal alloantibody(ies).
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Evaluation to be based on actual
serologic findings or known case histories.
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Select the most appropriate
elution technique when evaluating a positive direct antiglobulin test.
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Demonstrate the elution of an
antibody
(if applicable) using either the Lui-Freeze/Thaw or Acid Elution technique.
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Discuss policies related to
blood selection and compatibility testing requirements for neonates in
need of:
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Routine transfusion
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Exchange transfusion
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Demonstrate or describe the
preparation of blood products for aliquot or exchange transfusion including:
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Packed red blood cells
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Modified whole blood
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Platelets
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Fresh frozen plasma
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TRANSFUSION
COMPLICATIONS
The student will perform
all necessary tests and clerical work necessary to work up a transfusion
reaction. Upon completion of this unit, the student will be able
to:
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Define the term "transfusion
reaction."
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Identify the signs and symptoms
that may accompany hemolytic transfusion reactions.
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Describe the protocol for the
investigation of a transfusion reaction including initial and extended
testing according to AABB Standards. Arrange the steps in a post-transfusion
work-up in the appropriate sequence.
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State the most frequent cause
of an acute hemolytic transfusion reaction.
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List the characteristics of
a delayed hemolytic transfusion reaction, including the etilogy and the
usual clinical consequences of such a reaction.
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Name the most frequent cause
of febrile transfusion reaction.
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Name other types of immunologic
transfusion reactions (not including acute hemolytic and febrile non-hemolytic).
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Name the nonimmunologic cause
or causes of immediate and delayed transfusion reactions.
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Given a pretransfusion specimen
and post transfusion specimen, the student will perform serological techniques
and interpret the test results in an acceptable amount of time to assist
the physician to initiate appropriate therapy.
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Discuss the features of graft-versus-host
disease including etiology and prevention.
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Name the diseases that can be
transmitted through blood or blood components.
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List the screening tests currently
performed on donor blood to detect and prevent transfusion transmitted
diseases.
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Identify the limitations of
infectious disease testing in relation to the "window period" of infection.
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Explain how new technologies
are impacting the "window period" of particular infectious diseases.
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Explain the fundamental differences
between infectious disease screening tests and confirmatory tests.
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Define the current risk of disease
transmission for HBV, HCV and HIV through blood transfusion.
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Define the term "Look-back."
MOLECULAR
DIAGNOSTIC and IMMUNOLOGIC ASSAYS
Objectives
Upon
completion of this unit, the student will be able to:
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List the
assays and identify the analyte in the affiliate's laboratory that utilize
molecular diagnostic techniques.
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Explain
the principle of each assay listed in #1.
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For each
assay listed in #1, discuss its clinical significance (e.g., impact on
diagnosis or treatment of associated disease).
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List the
assays and identify the analyte in the affiliate's laboratory that utilize
diagnostic immunologic techniques.
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Explain
the principle of each assay listed in #4.
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Perform
immunological assays offered by the affiliate.
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For each
assay listed in #4, discuss its clinical significance (e.g. impact on diagnosis).
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