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Phlebotomy Procedures Flashcards

6 cards from real CCMA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Phlebotomy Procedures flashcards as text

  1. A tourniquet should be released within how many minutes of application to prevent hemoconcentration?

    Answer: 1 minute

    The tourniquet should be applied no longer than 1 minute to prevent hemoconcentration and hemolysis, which can falsify laboratory results.

  2. Which gauge needle is most commonly used for routine adult venipuncture?

    Answer: 21–22 gauge

    21–22 gauge needles are standard for routine adult venipuncture, providing adequate flow without excessive trauma to the vein or hemolysis.

  3. Which of the following patients should have the antecubital vein avoided for venipuncture?

    Answer: A patient with a dialysis fistula in the left arm

    Venipuncture in an arm with a dialysis arteriovenous (AV) fistula is contraindicated, as it risks damaging the fistula and compromising dialysis access, which can be life-threatening.

  4. The gray-top (fluoride/oxalate) tube is specifically required for which laboratory test?

    Answer: Whole blood glucose testing

    The gray-top tube contains sodium fluoride (a glycolytic inhibitor) that prevents continued glucose metabolism after collection, preserving accurate blood glucose levels.

  5. When drawing multiple tubes during a single venipuncture, which tube must be drawn BEFORE the SST (gold) tube?

    Answer: Sodium citrate (light blue) tube

    The light blue (sodium citrate) tube must be drawn before the SST because citrate tubes require a precise 9:1 blood-to-anticoagulant ratio, which can be disrupted by carryover from SST clot activator.

  6. A patient states they are scared of needles and may faint. What precaution should the medical assistant take?

    Answer: Have the patient lie down or recline in a phlebotomy chair with safety restraints available

    Patients who are prone to vasovagal syncope (fainting) during blood draws should be positioned supine or in a reclined chair with side arms to prevent injury from falling.