Phlebotomy Review (Chapter 53) – Flashcards
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The largest of the Vacutainer tubes typically used for phlebotomy fills to volume to 10mL. Approximately____ tubes are needed to fill a pint (473mL)
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50
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_____is the liquid portion of the blood that contains clotting agents.
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plasms
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The typical site for a capillary puncture in an adult is the _____finger
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fifth (ring)
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______are used for small veins, such as those in the hand or in a pediatric patient
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butterfly needle
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The best prevention for needlestick injuries after venipuncture is the use of ______
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SESIP
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A_____is a special laboratory filter paper used to collect a blood sample from newborn
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guthrie
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Leaving a tourniquet on longer than 1 minute greatly increases the chance of ________
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hemoconcentration
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A______is applied to the skin 30 to 60 seconds before the blood draw to prevent infection at the puncture site.
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alcohol
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The liquid portion of blood that remains after the blood has clotted in a collection tube is the______
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serum
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Using a collection needle with a wider lumen reduces the chance that_____ will occur
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hemolysis
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The typical site for a capillary puncture on an infant is the medial or lateral side of the_______
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heel
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Securing a patient in a blood collection chair helps prevent injuries if the patient experience______
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syncope
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The Vacutainer tube with a marbled, red-gray top contains_____ particles to enhance clotting and a thrixotropic gel to assist in the separation of serum and blood cells.
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silica
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Gauge is designated by a numeric value; the higher the number, the smaller the____
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lumen
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The_____is the part of the venipuncture needle that fits into the syringe or Vacutainer adapter
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hub
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Can a tourniquet be used when a venous blood sample is to be drawn from the hand.
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TRUE
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________________ are small blood vessels that connect small arterioles to small venules
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capillaries
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The __________ the gauge number, the larger the lumen; the less chance of hemolysis
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smaller
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Plasma could be retrieved from what 2 types of tubes _______ and_________
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lavender and gray
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Medical assistants should obtain verbal consent to perform the procedure simply by asking whether they have permission to take some blood from the arm.
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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 __________
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up right
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The tourniquet should be left tied on the arm no longer than _____
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1 minute
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Routine adult venipuncture requires a ____ to_____ gauge needle.
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20 to 21
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A tourniquet prevents _____ _____ out of the site, causing the veins to bulge.
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venous flow
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The medical assistant should never attempt to ________ a contaminated needle
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re-cap
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When the patient regains consciousness he or she must remain in the facility for at least __________and should not operate a vehicle for at least ____________
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??
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Which Vacutainer tubes is routinely used for hematology testing? ________
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lavender topped
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A ______ is used to perform a dermal puncture; it delivers a quick puncture to a predetermined depth.
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lancet
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During a routine venipuncture, when should the phlebotomist request that the patient release the fist?
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after applying the tourniquest and before inserting the needle
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If the patient complains of tingling, numbness, or a shooting pain what should you do?
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discontinue the procedure and choose another site before continuing
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Why should a tourniquet not be tied too tightly? 3 reasons
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impede arterial blood flow; restrict venous blood return; resulting in poor venous distention
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Blood should be collected only by _____ ______ in children younger than 2 years unless the procedure warrants venous collection (lead levels or blood culture).
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dermal puncture
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_______ is the liquid part of whole blood that provides the medium for blood cells and dissolved particles to be carried through the bloodstream.
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?
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When a medical assistant obtains a capillary blood sample, it is important that he or she squeeze and "milk" the finger to obtain an adequate amount of blood. T or F
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FALSE
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The needle bevel is face up, and the needle is inserted at a __degree angle.
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15
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You are required to collect a venous sample for a typical hematology test, for a complete blood count you choose a _______ top tube
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lavender
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During a routine venipuncture, when should the phlebotomist request that the patient release the fist?
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when blood enters the first tube being drawn
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The color of the tube top for the collection of a coagulation test is: _______
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light blue
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When is the correct time to remove the tourniquet during a routine venipuncture?
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When final tube about be filled
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If you are drawing blood on an older patient with a history of collapsed veins, you should try to collect the blood sample with a _______
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Butterfly needle
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The most common causes of hematoma formation during blood draws are excessive probing with the needle to locate a vein, failure to______ into the vein, and penetration of the needle ______
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insert needle far enough; goes through
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The______ is the slanted edge at the tip of the needle.
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bevel
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Petechiae typically occur because
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?
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Clot activators promote clotting of blood. Without a clot activator, blood clots in ____ to ________ minutes, after which it must be centrifuged.
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30 to 60
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If blood is flowing into the Vacutainer too slowly, you should
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withdraw the needle slightly to the center it in the vein
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______ tubes have no additives and are used for serology and chemistry studies.
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light green
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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 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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EDTA
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The needle size most commonly used by the blood bank for donations is ___ gauge.
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16
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The ______ is used to collect venous samples
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?
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A serum specimen must clot, and _________ topped and __________ topped tubes aid this process.
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red; black
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Before a routine venipuncture or capillary puncture, the site typically is cleaned with: ___________
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?
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Blood obtained via capillary puncture can be collected: (4 ways)
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microcollection; microteiner; microhematocrit
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The needle size most commonly used in infants and older adults is _____ gauge.
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23
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A winged infusion set is also known as a:
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butterfly needle
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Which vein(s) can be used for routine venipuncture? (3)
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medial cephalic; medial basilic; supplementary cephalic
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The laboratory requisition indicates that you are to collect a venous blood specimen for hematology testing, serum chemistry testing, and coagulation studies. What is the proper order of collection for these tubes?
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red, light blue, lavender
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_______ are used when there is concern that the strong vacuum in a stoppered tube may collapse the vein.
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syringes
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Leaving a tourniquet tied on a patient's arm for longer than the recommended time results in:
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hemoconcentration
