phlebotomy part III – Flashcards
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Which of the following vacutainer tubes is routinely used for hematology testing?
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lavender topped
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No anticoagulant are found in which of the following tubes?
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Red topped
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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 and anticoagulant that prevents platelets from clumping and preserves the appearance of blood cells for microscopic preparation.
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ETHYLENEDIAMINE TETRAACETIC ACID (EDTA)
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The slant at the open end of the needle used for venipuncture is called the
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Bevel
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The needle size most commonly used for adult venipuncture is ___ gauge.
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21
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The needle size most commonly used to the blood bank for donation is ___ gauge.
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16
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The needle size most commonly used in infants and the elderly is ___ gauge.
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23
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plasma could be retrieved from a:
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SST green-gray tube and PST green-gray tube
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A tourniquet i used during the phlebotomy procedure to:
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prevent venous flow out of the side cause the vein to bulge
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a tourniquet should remain tied on a patient's arm no longer than:
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1 minute
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Without a clot activator, whole blood typically clots in _____ minutes.
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30 to 60
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Thixotropic gel, found in the 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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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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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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light blue, red, lavender.
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you are required to collect a venous sample for typical hematology test, the complete blood count. You collect
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a lavender-topped tube
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A syringe is preferred over a Vacutainer collection device when:
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the patient's veins are fragile
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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.
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Before a routine venipuncture or capillary puncture, the site typically is cleaned with:
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isopropyl alcohol.
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In a routine venipuncture, the angle at which the needle enters the arm should be ___ degrees.
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15
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During a routine venipuncture, when should the 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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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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When is the correct time to remove the tourniquet during a routine venipuncture?
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as the last tube to be drawn begins to fill.
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Which veni(s) can be used for routine venipuncture?
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Medial cephalic Medial basilic Supplemetary cephalic
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A winged infusion set is also known as:
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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 is made to recap a needle
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why should a tourniquet not be tied too 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 hematoma can be 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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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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The device used for dermal puncture is a(n):
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lancet
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The most common phlebotomy site in adults is/are the:
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veins in the antecubital space
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The proper procedure for collecting a serum specimen is to:
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allow the specimen to clot use a red or marbled-top tube
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Which is the 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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You are performing a capillary puncture on a patient and are having difficulty collecting and adequate sample. 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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The clear part of whole blood that contains clotting agent is:
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plasma
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Capillary blood samples may be collected at all of the following sites except the?
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antecubital space
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Which is the 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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The color of the tube top for collection of a coagulation test is:
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light blue
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Erythrocytes have a typical ___ shape because of______
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concave; their lack of a nucleus
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Granular leukocytes:
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act as phagocytes
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Which of the following test is used to determine renal function?
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creatine
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Dr. Lim orders a CPK draw on Mr. Roberts. What do elevated CPK levels indicate?
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Possible MI
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Which of the following is a normal adult WBC count?
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10,000 cells/mm3
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Platelets:
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none of the above
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In performance of a microhematocrit:
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the open end of the capillary should be sealed clay before centrifuging
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The buffy coat:
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is white
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A decreased heamtocrit value could be the result of:
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hemorrhage anemia
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The copper sulfate method of determining the hemoglobin level is:
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qualitative test based on the specific gravity of hemoglobin commonly used to screen blood donors
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While Mr. Chakrabarti's hematocrit sample is spinning in the centrifuge, you perform an automated hemoglobin test on a sample of his blood and record the value as 15g/dL. You do a quick mental calculation and expect that the hematocrit value will be approximately:
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45%
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Which of the following is a normal H&H for a female?
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36& and 14g/dL
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Increases in the RBC count are found in which of the following?
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dehydration
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Which component of the complete blood count is not necessary to calculate the red cell indices?
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differential
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A properly prepared wedge smear:
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has blood covering one half to three quarters of the slide
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A hematocrit reading of 37 indicates what?
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RBCs account for 37% of the total blood volume
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Which statement is true about leukocytes?
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Leukocytes are the largest circulating blood cells Granulocytes have segment nuclei Neutrophils are the most numerous WBCs in circulation Bacterial infections stimulate increased production of neutrophils
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Which of the following is an abnormal value for a differential?
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50% to 70% basophils
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The ESR test results:
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vary greatly between genders and as people age
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The protime is:
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also known as the prothrombin time performed to evaluate warfarin (Coumadin) theraphy performed on a specimen collected in a light blue-topped Vacutainer tube
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Which department of the laboratory of the laboratory H&H tests?
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hematology
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A blood test that analyzes the ability of the kidneys to perform their function is the:
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BUN
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A person with type O blood has:
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anti-A and anti-B antibodies in circulation
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When is administration of Rho(D) immune globulin absolutely necessary?
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If an Rh-negative mother gives birth to an Rh-positive stillborn
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Which of the following is not detected in a liver panel test?
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CBC
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TSH levels are assessed to determine the function of what organ(s)?
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pituitary
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Troponin is a component of a(n)______ panel
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cardiac
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Hormones detected in a thyroid panel include:
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Thyroxine triiodothyronine thyroid-stimulating
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Which statement is true about HDL?
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it transport cholesterol
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Hemoglobin A1C is measured to monitor:
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diabetes
