#1
Which of the following is a common site for venipuncture?
Median cubital vein
ExplanationCommon site due to accessibility and stability.
#2
What is the recommended angle for inserting a needle during venipuncture?
45 degrees
ExplanationOptimal angle to minimize discomfort and ensure proper insertion.
#3
What is the primary purpose of a tourniquet during venipuncture?
To dilate the vein
ExplanationFacilitates vein visualization and access.
#4
Which of the following veins is typically the easiest to palpate in the antecubital area?
Median cubital vein
ExplanationProminent and easily accessible for venipuncture.
#5
Which antiseptic is commonly used to clean the site before venipuncture?
Alcohol
ExplanationWidely used for its effectiveness and accessibility.
#6
What does the term 'Hemoconcentration' refer to in phlebotomy?
Increase in blood viscosity
ExplanationResult of a higher concentration of blood cells in plasma.
#7
Which gauge needle is commonly used for routine venipuncture in adults?
20 gauge
ExplanationBalances speed of draw with patient comfort.
#8
What is the proper order of draw for multiple blood specimens?
Lavender, Red, Green, Gray
ExplanationMinimizes cross-contamination and ensures accurate results.
#9
Which blood specimen is typically collected in a light blue-top tube?
Plasma
ExplanationContains an anticoagulant to preserve the sample.
#10
Which additive is commonly found in a lavender-top tube?
EDTA (Ethylenediaminetetraacetic acid)
ExplanationPrevents coagulation by binding calcium ions.
#11
Which of the following tests requires a fasting specimen?
Blood glucose
ExplanationFasting helps ensure accuracy by avoiding postprandial fluctuations.
#12
Which vein is commonly used for venipuncture in pediatric patients?
Cephalic vein
ExplanationOften preferred due to accessibility and lower risk of complications.
#13
What is the purpose of gently inverting blood tubes after collection?
To mix additives with blood
ExplanationEnsures proper mixing for accurate test results.
#14
Which of the following is a potential complication of venipuncture?
Hematoma
ExplanationOccurs due to blood leakage into surrounding tissue.
#15
Which of the following is an appropriate action if a patient experiences syncope during venipuncture?
Keep the patient lying down and call for assistance
ExplanationPrevents injury and ensures prompt medical attention.
#16
Which vein should be avoided during venipuncture due to its proximity to the brachial artery and median nerve?
Median cubital vein
ExplanationMinimizes risk of nerve damage and discomfort.