5. Collecting, Processing, and Testing Blood Specimens. Introduction. Medical assistant Collects blood specimens Performs waived testing Knowledge needed Understand circulatory system and function of blood Appropriate supplies and equipment How to perform and screen common blood tests.
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Collecting, Processing, and Testing Blood Specimens
ANSWER: The medical assistant will put the patient at ease during the procedure, process specimens, conduct testing, complete necessary paperwork, and make sure specimens are handled properly.
What are three functions of blood?
ANSWER: Functions of the blood are: (list any 3)
Distributes oxygen, nutrients, and hormones
Eliminates waste products
Attacks infecting pathogens
Maintains acid-base balance
Regulates body temperature
Hold needle still
Hold pressure on siteafter removal of needle
Use non-latex gloves,tourniquet, and bandages
Clean site prior to venipuncture
May not be evident for several daysCollecting Blood Specimens (cont.)
Superficial puncture of skin with sharp point
Lancets– small, disposable instruments
Automatic puncturing devices
Micropipettes – small, calibrated glass tubes that hold a precise volume of fluid
Reagent products –chemically treated paper or dipstick
Smear slidesCollecting Blood Specimens (cont.)
What precautions should you take when collecting a blood specimen?
ANSWER: You should use Standard Precautions and appropriate personal protective equipment.
Difficult venipuncture – do not stick more than twice
Fainting patients –
Reaction to blood draw
Position to avoid injurySpecial Considerations (cont.)
What is one precaution you can take when drawing blood from a patient who is taking anticoagulants?
ANSWER: After drawing blood on a patient taking anticoagulants, you should hold a cotton ball over the puncture site for at least 5 minutes, monitor the site carefully, and notify the physician if bleeding does not stop.
Enzyme-linked immunosorbent assay (ELISA)
Immunofluorescent antibody (IFA) test
Rapid screening tests
Helicobacter pyloriSerologic Tests
___ Hemoglobin A1c A. ESR
___ Lysing RBCs/evaluating the color B. Serology test
___ Shape or form of objects C. Coagulation tests
___ Identify bleeding problems D. Chemical test
___ Rate at which RBCs fall E. Differential
___ Percentage of each type of WBC F. Morphology
___ ELISA G. Hemoglobin