Practice Test Geeks(CMLA) Certified Medical Laboratory Assistant Practice Test
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Phlebotomy Flashcards

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

Read the first 7 Phlebotomy flashcards as text

  1. Which complication is most likely if a phlebotomist accidentally punctures the brachial artery during venipuncture?

    Answer: Rapid, bright red blood flow and pulsation in the tube

    Arterial blood is oxygenated (bright red) and flows rapidly under higher pressure, often pulsating into the collection tube.

  2. The term 'sclerosed vein' refers to a vein that is:

    Answer: Hardened and fibrotic due to repeated venipuncture or disease

    Sclerosed veins are stiff and cord-like from scar tissue, making successful venipuncture difficult and increasing the risk of hematoma.

  3. Why must the first few drops of blood be discarded when performing a capillary puncture for most tests?

    Answer: The first drops contain excess tissue fluid that can dilute and alter the specimen

    The initial drops mix with interstitial fluid from tissue trauma, which can dilute analytes and affect test accuracy.

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

    Answer: 21 gauge

    A 21-gauge needle provides adequate flow for evacuated tube collection without causing excessive hemolysis or vein trauma.

  5. A chain of custody procedure is required for specimens collected for:

    Answer: Forensic drug testing and legal/employment toxicology screens

    Chain of custody documents every person who handles a forensic specimen to ensure its integrity is legally defensible in court.

  6. What does the abbreviation 'SST' stand for, and what is its primary use?

    Answer: Serum Separator Tube; used for serum chemistry testing

    The SST (gold or red-gray top) contains a clot activator and gel separator that separates serum from cells after centrifugation for chemistry testing.

  7. A phlebotomist is asked to collect a specimen from an arm with a peripherally inserted central catheter (PICC). What is the correct action?

    Answer: Collect from the opposite arm unless specifically ordered to draw from the line by nursing staff

    PICC lines are typically managed by nursing; phlebotomists should use the opposite arm unless specifically ordered and trained to access the line.