Clinical Laboratory Safety and Procedures Quiz
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What is the primary function of type 3 water in a clinical laboratory?

  • Rinsing glassware and calibrating thermometers.
  • Maintaining specific temperatures in incubators and freezers.
  • Providing feed water to type 1 systems and cell culture incubators.
  • Filling autoclaves, heating baths, and humidifiers. (correct)

    • Which of the following best describes a solute?

  • A biologic fluid.
  • A substance that is dissolved in a liquid. (correct)
  • A type of solution.
  • The liquid in which a substance is dissolved.

    • What is the standard temperature of calibration mentioned for Class A glassware?

  • 20 °C (correct)
  • 0 °C
  • 37 °C
  • 25 °C

    • Which of the following is NOT a characteristic of a solution?

    <p>Temperature.</p> Signup and view all the answers

    If a temperature is measured as 68°F, what is the equivalent temperature in Celsius?

    <p>20°C</p> Signup and view all the answers

    If a clinical laboratory requires a temperature of 298K for a procedure, what would be the equivalent temperature in Celsius?

    <p>25 °C</p> Signup and view all the answers

    Which type of thermometer is being replaced due to environmental concerns?

    <p>Liquid-in-glass thermometer containing mercury</p> Signup and view all the answers

    Why is it important for clinical thermometers to be calibrated?

    <p>To ensure accurate temperature measurements by referencing an NIST certified thermometer</p> Signup and view all the answers

    What is the primary purpose of a chemical fume hood?

    <p>To contain and expel noxious and hazardous fumes.</p> Signup and view all the answers

    What is a critical factor to consider when operating a fume hood?

    <p>Establishing and marking a maximum operating sash height.</p> Signup and view all the answers

    How should the ventilation of a fume hood be evaluated?

    <p>By measuring face velocity with a calibrated meter.</p> Signup and view all the answers

    What is the recommended range for face velocity at the opening of a fume hood?

    <p>100 to 120 feet per minute.</p> Signup and view all the answers

    When should the face velocity of a fume hood be measured?

    <p>Periodically.</p> Signup and view all the answers

    What is the primary purpose of safety glasses, goggles, or visors in a laboratory?

    <p>To prevent splashing into the eyes and face.</p> Signup and view all the answers

    Why are contact lenses not considered appropriate eye protection in the lab?

    <p>They do not offer splash or impact protection.</p> Signup and view all the answers

    What is the purpose of an Exposure Control Plan regarding bloodborne pathogens?

    <p>To minimize the risk of blood or other potentially infectious material exposure.</p> Signup and view all the answers

    What is the primary hazard associated with centrifuging biologic specimens?

    <p>The creation of finely dispersed aerosols that may contain infectious agents.</p> Signup and view all the answers

    What is a recommended practice to minimize the risk of aerosol transmission when working with a standard centrifuge?

    <p>Wait several minutes after completion of the spin before opening the lid.</p> Signup and view all the answers

    What is the most suitable alternative when a standard centrifuge is not ideal?

    <p>A sealed-cup centrifuge to prevent aerosol leaks.</p> Signup and view all the answers

    What is the first action you should take when a spill occurs?

    <p>Alert others in the area about the spill.</p> Signup and view all the answers

    When dealing with a spill that involves broken glass in the lab, which method of cleanup is recommended?

    <p>Use mechanical devices to pick up broken glass before other procedures.</p> Signup and view all the answers

    Which of these is recommended for absorbing liquid spills?

    <p>Paper towels, gauze pads, or tissue.</p> Signup and view all the answers

    After absorbing a spill, what is the next step to ensure the area is thoroughly cleaned?

    <p>Clean the area with an aqueous detergent.</p> Signup and view all the answers

    According to the text which fire extinguisher is recommended for use in computer equipment areas?

    <p>Halogenated hydrocarbon extinguisher.</p> Signup and view all the answers

    What is a primary characteristic of reactive chemicals?

    <p>They spontaneously ignite or explode or emit gases under specific conditions.</p> Signup and view all the answers

    Which of the following actions should be taken first in the event of a chemical spill?

    <p>Assist or evacuate personnel from the area.</p> Signup and view all the answers

    Which type of glove material is NOT acceptable for phlebotomy procedures?

    <p>All of the provided options are acceptable.</p> Signup and view all the answers

    What is the most commonly used antiseptic for routine blood collection?

    <p>70% isopropyl alcohol</p> Signup and view all the answers

    How does ambient temperature affect the draw volume of evacuated blood collection tubes?

    <p>Higher temperatures result in a reduced draw volume.</p> Signup and view all the answers

    How does high altitude affect the draw volume of evacuated blood collection tubes?

    <p>High altitude leads to a lower draw volume.</p> Signup and view all the answers

    Which of the following is NOT listed as an environmental factor associated with evacuated blood collection tubes?

    <p>Air pressure</p> Signup and view all the answers

    What precaution should be taken when using disposable gloves for phlebotomy?

    <p>Ensure the gloves are disposable and non-sterile.</p> Signup and view all the answers

    When using tubes with clot activators, what is the approximate clotting time?

    <p>5 minutes</p> Signup and view all the answers

    Which of the following is the first step in sample collection?

    <p>Proper patient identification</p> Signup and view all the answers

    A phlebotomist is having trouble finding an appropriate vein. After attempting the median cubital, what is the second vein of choice?

    <p>Cephalic Vein</p> Signup and view all the answers

    Which type of specimen contains both plasma and cells?

    <p>Whole blood</p> Signup and view all the answers

    What type of tube is typically used first in the Evacuated Tube System (ETS) order of draw?

    <p>Blood culture tube</p> Signup and view all the answers

    In a dermal puncture, which of the following tubes is collected after the blood smear/slide?

    <p>EDTA tubes</p> Signup and view all the answers

    How long does it take for a plain red-stoppered tube with no additives to clot completely?

    <p>60 minutes</p> Signup and view all the answers

    Why are tubes containing gels not used for blood bank (BB) or immunological testing?

    <p>They may interfere with immunologic reactions</p> Signup and view all the answers

    What is the primary function of the bevel on a phlebotomy needle?

    <p>To facilitate smooth insertion into the skin and vein.</p> Signup and view all the answers

    Which needle gauge is considered standard for most routine adult antecubital venipunctures?

    <p>21-gauge</p> Signup and view all the answers

    What is the recommended maximum time for tourniquet application during blood collection?

    <p>1 minute (60 seconds)</p> Signup and view all the answers

    What ratio of blood to anticoagulant is required when using a light blue-top tube for coagulation testing?

    <p>9:1</p> Signup and view all the answers

    Which type of tube is primarily used for glucose measurements due to its antiglycolytic properties?

    <p>Gray-top tube</p> Signup and view all the answers

    What is the mechanism of action of heparin as an anticoagulant?

    <p>It accelerates the action of antithrombin III</p> Signup and view all the answers

    For which specific purpose are black-top tubes used?

    <p>Westergren ESR</p> Signup and view all the answers

    Which of the following is a common cause of erroneous test results due to improper phlebotomy technique?

    <p>Prolonged tourniquet application results in hemoconcentration</p> Signup and view all the answers

    What does the term 'lumen' refer to when discussing needles?

    <p>The internal space inside the needle</p> Signup and view all the answers

    What is the effect of using a blood pressure cuff as a tourniquet, and what is the recommended pressure?

    <p>To provide a similar pressure to a standard tourniquet, 40 to 60 mmHg</p> Signup and view all the answers

    What is the main purpose of the clot activator in red/gray- and gold-top tubes (SSTs)?

    <p>To accelerate the rate of clot formation</p> Signup and view all the answers

    In obese patients, what is the recommended range for blood pressure cuff tourniquet pressure?

    <p>40 mmHg</p> Signup and view all the answers

    What is the primary purpose of using multiple sample needles in the Evacuated Tube System (ETS)?

    <p>To enable multiple tubes to be filled from one venipuncture</p> Signup and view all the answers

    What is the significance of the thixotropic gel found in red/gray- and gold-top SST tubes?

    <p>To separate serum from cellular components, potentially causing falsely lowered results with some drugs</p> Signup and view all the answers

    Why is the use of sodium heparin preferred over lithium heparin for certain tests?

    <p>Because sodium heparin does not affect the levels of trace elements</p> Signup and view all the answers

    Study Notes

    Clinical Chemistry Table of Contents

    • BASICS OF CLINICAL CHEMISTRY - page 2
    • QUALITY ASSESSMENT & QUALITY CONTROL - page 9
    • LABORATORY SAFETY - page 16
    • SPECIMEN COLLECTION & HANDLING - page 20
    • ANALYTICAL METHOD - page 25
    • CARBOHYDRATES - page 30
    • LIPIDS AND LIPOPROTEINS - page 38
    • PROTEINS -page 48
    • NONPROTEIN NITROGEN - page 55
    • ENDOCRINOLOGY - page 81
    • THERAPEUTIC DRUG MONITORING - page 93
    • TOXICOLOGY - page 96
    • VITAMINS - page 99
    • TUMOR MARKERS - page 100

    Units of Measure

    • SI system units (SI) - based on the metric system
    • Analyte: a biologic solute or constituent
    • Conversion Factor (CF) required to convert between different units
    • Examples of analytes and their corresponding units and conversion factors provided

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    Description

    Test your knowledge on key concepts and safety protocols in a clinical laboratory. This quiz covers various topics such as the function of type 3 water, characteristics of solutions, and the importance of proper laboratory equipment. Ensure you understand the best practices for maintaining a safe and efficient laboratory environment.

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