#1
Which vein is commonly used for venipuncture?
Median cubital vein
ExplanationPrimary access point due to visibility and stability.
#2
What is the purpose of using a tourniquet during venipuncture?
To make the veins more visible and easier to access
ExplanationEnhances visibility and accessibility of veins.
#3
What does the acronym PPE stand for in the context of phlebotomy?
Personal Protective Equipment
ExplanationCritical for safety against exposure to bloodborne pathogens.
#4
Which of the following is NOT a step in the process of blood specimen collection?
Inserting the needle immediately upon identifying the vein
ExplanationAllows time for proper site preparation and patient positioning.
#5
What is the primary purpose of a blood culture test?
To detect the presence of microorganisms in the bloodstream
ExplanationIdentifies pathogens causing systemic infections.
#6
Which of the following is a potential complication of using a butterfly needle for venipuncture?
Nerve damage
ExplanationDue to the delicate nature of nerves, improper insertion can cause damage.
#7
Which of the following additives is commonly used in blood collection tubes for coagulation studies?
Sodium citrate
ExplanationPrevents blood from clotting by chelating calcium ions.
#8
What is the correct angle for inserting a needle during routine venipuncture?
45 degrees
ExplanationOptimal angle to puncture the vein without damage.
#9
What is the purpose of palpating the vein before venipuncture?
To confirm the vein's location and size
ExplanationEnsures accurate needle insertion.
#10
Which of the following is NOT a recommended site for fingerstick blood collection?
Thumb
ExplanationThumb has dense tissue, resulting in inadequate blood flow.
#11
What is the purpose of wiping the first drop of blood during capillary puncture?
To decrease the likelihood of clotting
ExplanationClears away tissue fluid and reduces contamination.
#12
What is the purpose of gently inverting blood collection tubes after specimen collection?
To mix the additives with the blood
ExplanationEnsures homogeneous distribution of additives.
#13
Which of the following veins is commonly used for venipuncture in pediatric patients?
Brachial vein
ExplanationAccessible and larger in pediatric patients.
#14
Which of the following is a potential complication of phlebotomy?
Hematoma
ExplanationLocalized swelling due to blood leakage.
#15
Which of the following is a symptom of a needle infiltration during venipuncture?
Pain and swelling at the site
ExplanationIndicates improper needle placement and tissue damage.
#16
What is the recommended sequence for drawing blood culture bottles?
Lavender top, red top, yellow top
ExplanationEnsures proper sample collection for culture testing.
#17
What is the recommended procedure for disposing of used needles and other sharps after phlebotomy?
Placing them in a puncture-resistant container labeled as 'biohazard'
ExplanationMinimizes risk of needle-stick injuries and biohazard exposure.
#18
What is the recommended order of draw for multiple blood samples using evacuated tubes?
Lavender top, yellow top, green top
ExplanationMinimizes the risk of cross-contamination and sample compromise.
#19
What is the recommended order of cleansing agents during routine venipuncture site preparation?
Alcohol, chlorhexidine, iodine
ExplanationProgressively increases antiseptic efficacy.
#20
What is the purpose of a syringe draw in blood collection?
To collect a larger volume of blood
ExplanationPreferred for patients with fragile veins or small blood volume requirements.