NHA Phlebotomy Practice Test – Flashcards
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A term used to describe a blood sample in which the red blood cells have ruptured is:
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Hemolyzed
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Which of the following Vacutainer tubes is routinely used for hematology testing?
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Lavender
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No anticoagulants are found in which tube?
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Plain Red
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Which type of tube should be used to collect blood specimens during a glucose tolerance test?
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Gray
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What is the anticoagulant that prevents platelets from clumping and preserves the appearance of blood cells for microscopic preparation?
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EDTA( Ethylenediamine tetraacetic acid)
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What is the name of the slant at the open end of a needle used for venipuncture?
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Bevel
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What is the most commonly used needle size for an adult venipuncture?
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21 guage
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What is the most commonly used needle size for an infant and the elderly?
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23 guage
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How long should a tourniquet remain tied on a patient's arm?
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No longer than 1 minute
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Without a clot activator, whole blood typically clots in how many minutes?
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30-60 min.
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Thixotropic gel, found in the SST Tiger top tube is characterized as being:
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less dense than red blood cells but more dense than serum
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What is the proper order for collection of a blood specimen for hematology testing, serum chemistry testing, and coagulation studies?
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Light blue, red, lavender
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What is the correct tube for a typical hematology test (CBC)?
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Lavender
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What happens when you leave a tourniquet tied on a patient's arm for longer than the recommended time?
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Hemoconcentration
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What is the site cleaned with before performing a venipuncture or capillary puncture?
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Isopropyl Alcohol
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What angle do you position the needle to perform a routine venipuncture?
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15 degrees
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When is the correct time to remove the tourniquet during a venipuncture?
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As the last tube to be drawn begins to fill
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What is a winged infusion set also known by?
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Butterfly
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What is a hematoma caused by?
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Excessive probing to locate a vein, failure to insert the needle far enough into the vein, penetration of the needle through a vein.
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What is the most common phlebotomy site in adults?
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veins in the antecubital space
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What is the clear part of whole blood that contains clotting agents?
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Plasma
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What tube is used for a coagulation test?
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Light blue
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Oder of Draw
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Sterile
Light Blue
Red/Tiger
Green
Lavender
Gray
