#1
Which vein is commonly used for venipuncture in phlebotomy?
Cephalic vein
ExplanationCommonly accessed due to visibility and accessibility.
#2
What is the primary purpose of a tourniquet during phlebotomy?
To dilate the veins
ExplanationIncreases blood flow, facilitating vein puncture.
#3
What is the standard angle of needle insertion during routine venipuncture?
90 degrees
ExplanationOptimal angle for successful vein puncture.
#4
What is the recommended method for disposing of used phlebotomy needles?
Placing in a biohazard container
ExplanationEnsures safe disposal to prevent needlestick injuries.
#5
What is the primary role of a phlebotomist in patient care?
Drawing blood for diagnostic testing
ExplanationCritical in obtaining accurate diagnostic samples.
#6
Which of the following tubes is commonly used for collecting blood for a complete blood count (CBC)?
Lavender top tube
ExplanationContains EDTA to preserve cell integrity for CBC.
#7
What is the correct order of draw when using a multi-sample needle for venipuncture?
Yellow, Lavender, Gray, Red
ExplanationPreserves sample integrity and prevents contamination.
#8
In phlebotomy, what is the purpose of the anticoagulant present in a light blue top tube?
Preventing clotting
ExplanationPrevents coagulation for plasma separation.
#9
Which of the following is an example of a pre-analytical error in phlebotomy?
Incorrectly labeling blood tubes
ExplanationMay lead to sample misidentification and erroneous results.
#10
During a venipuncture, what is the purpose of the bevel on a needle?
To aid in needle removal
ExplanationFacilitates smooth withdrawal from the vein.
#11
What does the term 'hemostasis' refer to in the context of phlebotomy?
Blood clotting
ExplanationProcess to prevent excessive bleeding post-collection.
#12
Which of the following is a complication that may arise during phlebotomy due to a small needle gauge?
Hemolysis
ExplanationCan cause rupture of red blood cells, affecting sample quality.
#13
What is the correct order for the steps in the Universal Precautions protocol during phlebotomy?
Hand hygiene, Gloves, Mask, Gown
ExplanationEnsures protection against bloodborne pathogens.
#14
In phlebotomy, what is the purpose of a syringe draw as opposed to a vacuum tube draw?
Allowing for smaller sample volumes
ExplanationUseful when limited sample is available.
#15
Which of the following is a potential complication of prolonged tourniquet application during venipuncture?
Decreased blood flow
ExplanationMay lead to sample hemolysis and inaccurate results.