Phlebotomy chapter 53 – Flashcards
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The vacutainer tube with a marbled, red-gray top contains silica particles to enhance clotting and a thixotropic gel to assist in the separation of serum and blood cells
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True
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With regard to venipuncture needles, the smaller the gauge number the larger the lumen of the needle
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True
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The smaller the gauge of the venipuncture needle, the less likely it is that hemolysis of blood cells will occur
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True
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The Nccls has recommended that a red-topped waste tube be drawn before a light blue-rope vacutainer tube, because thromboplastin released from cells during the venipuncture can interfere with coagulation tests
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True
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A tourniquet should never be used when a venous blood sample is to be drawn from the hand
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False
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A patient must give verbal consent before venipuncture can be performed
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True
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Capillary blood is a mixture of arterial blood and venous blood
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True
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When the needle is inserted into the vein during a routine venipuncture , the bevel of the needle should be facing up
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True
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You should squeeze and milk a finger to obtain enough blood
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False
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80% of physicians decisions are based on laboratory test results
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True
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Tourniquet should be left on no longer than 1 minute
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True
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If patient faints must stay at facility for atleast 15 mins and not drive for 30 mins
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True
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Venipuncture needles used only once
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True
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It's important to sake vacutainer tube after collecting blood sample to sample and additive are mixed properly
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False
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If hematoma forms when drawing move needle around until you have re-entered the vein
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False
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If drawing from older patient with collapsed veins you should try to collect with syringe
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True
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Under OSHA guidelines, needle holders for vacutainers can be reused for multiple patients
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False
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You notice patient developing petechia during draw, this typically means that the patient has a bleeding disorder
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False
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If patient has mastectomy on left side this means you should not draw blood from this side
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True
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Ammonia inhalants are not used because of adverse effects on patients
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True
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If patient complains of tingling or numbness during draw the MA should continue to get done asap
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False
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If blood is flowing too slowly in vacutainer you should withdraw needle slightly to center it in the vein
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True
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All vacutainer tubes should be inverted three to five times to mix blood sample with the tube additive
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False
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Phlebotomy on teenage patients it's important that a parent is present during blood draw to give permission for the procedure
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False
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Blood should be collected only by dermal puncture in children younger than 2 years
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True
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Which tube is used routinely for hematology testing
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Lavender-topped
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No anticoagulants are found in which tube
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Red-topped
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Which type of tube should be used to collect blood specimen during glucose tolerance test
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Gray-topped
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Is an anticoagulant that prevents platelets from clumping and preserves the appearance of blood cells for microscopic preparation
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Ethylendiamine tetraacetic acid
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The slant at the open end of a needle used for venipuncture
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Bevel
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The needle size most commonly used for adult venipuncture
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21 gauge
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Needle size commonly used for donation
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16 gauge
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Needle size most commonly used in infants and older adults
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23 gauge
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Plasma could be retrieved from
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SST red-gray tube and PST green-gray tube
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A tourniquet is used during the phlebotomy procedure to
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Prevent venous blood flow out of site and cause vein to bulge
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A tourniquet should remain tied on a patients arm no longer than
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1 minute
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Without clot activator whole blood typically clots in
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30 to 60 mins
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Thixotropic gel, found in SST red-gray marbled-topped vacutainer tube is
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Less dense than red blood cells but more dense than serum
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Part of the venipuncture needle that fits into the syringe or vacutainer adapter
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Hub
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Proper order of collection tubes for hematology testing serum chemistry and coagulation studies
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Light blue,red. ,lavender
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For typical hematology test and CBC
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Lavender-topped tubes
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A syringe is preferred over a vacutainer collection when
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The patients veins are fragile
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Leaving a tourniquet tied longer than recommended time can result in
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Hemoconcentration
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Before routine venipuncture or capillary puncture the site typically is cleaned with
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Isopropyl Alcohol
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In routine venipuncture the angle the needle enters the arm
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15 degrees
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When should phlebotomist request that the patient make a fist
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After applying the tourniquet and before inserting the needle
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When should phlebotomist request that the patient release the fist
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When blood enters the first tube being drawn
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When should tourniquet be removed
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As the last tube is being filled
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Which veins can be used for routine venipuncture
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Medial cephalon, medial basilic, supplementary cephalon
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A winged infusion set is also known as a
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Butterfly needle
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A needle stick is more likely to occur if
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An attempt to recap a needle
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Why should a tourniquet not be tied to tightly
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It impedes arterial blood flow,It restricts venous blood return, it results in poor venous distention
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A he morons can be caused by
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Excessive probing to locate vein, failure to insert the needle far enough in vein, penetration of the needle through a vein
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Blood obtained via capillary puncture can be collected
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In microtainer tubes, in capillary tubes, in microhematocrit tubes, onto filter paper
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A device used for dermal puncture
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Lancet
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Most common phlebotomy site in adults
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Veins in ante cubical space
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Proper procedure for collecting a serum specimen is to
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Allow the specimen to clot, use a red-topped or marble-topped tube
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Most correct method for performing a capillary puncture
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Wipe away the first drop of blood and then collect the sample
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Which of the following is an accepted method to encourage blood flow from the site
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Gently rub the finger along the sides
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Clear part of whole blood that contains clotting agent is
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Plasma
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Capillary blood cannot be collected in
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Antecubital space
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Proper technique for performing a venipuncture
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The needle bevel is face up, and the needle is inserted at a 15- degree angle
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Color of tube top for collection if a coagulation test is
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Light blue
