#1
Which vein is commonly used for venipuncture in phlebotomy?
Cephalic vein
ExplanationCommonly accessible vein for blood collection.
#2
Which color-coded tube is commonly used for complete blood count (CBC) tests?
Lavender
ExplanationSpecific tube for CBC testing to ensure accurate results.
#3
What is the purpose of a blood bank in the context of phlebotomy?
Storing blood for future use
ExplanationPreserves blood for transfusions and emergencies.
#4
What is the purpose of using a tourniquet during phlebotomy?
To dilate the vein
ExplanationIncreases visibility and accessibility of veins.
#5
Which antiseptic is commonly used for cleaning the site before venipuncture?
Betadine
ExplanationAntiseptic solution to reduce risk of infection.
#6
What is the purpose of the Vacutainer system in phlebotomy?
To collect and transport blood samples
ExplanationFacilitates efficient blood sample collection.
#7
What is the recommended angle for needle insertion during venipuncture?
90 degrees
ExplanationOptimal angle for successful vein penetration.
#8
What is the primary purpose of a blood culture draw during phlebotomy?
Detecting infections
ExplanationIdentifies microbial presence in blood to diagnose infections.
#9
Which vein is commonly accessed for capillary blood sampling?
Dorsal hand vein
ExplanationAccessible vein for small-volume blood sampling.
#10
Which technique helps minimize the risk of hematoma formation during venipuncture?
Applying pressure after needle withdrawal
ExplanationReduces bleeding and bruising at the puncture site.
#11
What is the primary purpose of a butterfly needle in phlebotomy?
To minimize patient discomfort
ExplanationLess invasive needle for patients with delicate veins.
#12
Which anticoagulant is commonly used in lavender-top tubes for hematology tests?
EDTA (Ethylenediaminetetraacetic acid)
ExplanationPrevents blood clotting for accurate hematology testing.
#13
In phlebotomy, what is the purpose of the Bevel of the needle?
To facilitate smooth insertion
ExplanationSharp edge for easy skin penetration and reduced pain.
#14
Which type of blood specimen is commonly used for glucose monitoring in diabetic patients?
Capillary blood
ExplanationAccessible sample for frequent glucose monitoring in diabetics.
#15
Which factor can lead to hemoconcentration during phlebotomy?
Prolonged tourniquet application
ExplanationIncreased blood concentration due to prolonged vein constriction.
#16
What is the primary function of blood culture bottles in phlebotomy?
Detecting the presence of microorganisms
ExplanationIdentifies microbial infections in blood samples.
#17
In phlebotomy, what does the term 'venipuncture' refer to?
Inserting a needle into a vein
ExplanationPiercing the vein to draw blood.
#18
Which organization provides guidelines for phlebotomy procedures?
CLSI (Clinical and Laboratory Standards Institute)
ExplanationEstablishes standards for safe and accurate procedures.
#19
What is the term for the involuntary muscle contraction during venipuncture that may cause pain?
Vasospasm
ExplanationMuscle contraction leading to discomfort or difficulty in blood draw.
#20
Which factor is crucial for maintaining the integrity of blood samples during phlebotomy?
Prompt processing
ExplanationPrevents sample degradation and ensures accurate results.
#21
What is the purpose of the gel separator in some blood collection tubes?
Facilitating plasma separation
ExplanationSeparates plasma from other blood components for analysis.
#22
Which laboratory test is commonly affected by hemolysis of the blood sample?
Complete blood count (CBC)
ExplanationBreakdown of red blood cells affecting CBC accuracy.
#23
What is the purpose of the order of draw in phlebotomy?
To maintain sample integrity
ExplanationPrevents cross-contamination and accurate test results.
#24
What is the primary purpose of the Allen test in arterial blood gas (ABG) sampling?
To confirm collateral circulation
ExplanationAssesses blood flow to hand to avoid complications during ABG sampling.
#25
In phlebotomy, what is the purpose of the Z-track technique?
To reduce the risk of tissue damage
ExplanationPrevents leakage of blood and medications into surrounding tissues.