#1
Which vein is commonly used for venipuncture in adults?
Median cubital vein
ExplanationCommonly accessible and stable vein in the antecubital fossa.
#2
What is the purpose of using a tourniquet during venipuncture?
To make veins more visible and accessible
ExplanationIncreases venous pressure, aiding in vein distension.
#3
What is the recommended angle for inserting the needle during venipuncture?
30 degrees
ExplanationOptimal angle for successful venipuncture without puncturing through the vein.
#4
Which of the following is NOT a potential complication of phlebotomy?
Hyperglycemia
ExplanationElevated blood sugar is not a direct complication of phlebotomy.
#5
Which of the following is an appropriate action if a patient feels dizzy or faint during blood collection?
Stop the procedure immediately
ExplanationEnsures patient safety and prevents further complications.
#6
What is the primary purpose of using a butterfly needle during venipuncture?
To access difficult veins
ExplanationIdeal for small or fragile veins, providing better access.
#7
Which of the following is NOT a common site for capillary puncture?
Antecubital fossa
ExplanationDeeper veins such as the antecubital fossa are not used for capillary puncture.
#8
What is the purpose of gently rotating the collection tube during blood collection?
To mix anticoagulant with blood
ExplanationEnsures uniform distribution of anticoagulant throughout the sample.
#9
What does the term 'hemoconcentration' refer to?
Increased blood viscosity
ExplanationConcentration of blood constituents due to fluid loss.
#10
Which vein is commonly used for venipuncture in infants?
Dorsal venous network
ExplanationAccessible and less prone to damage in infants.
#11
Which of the following tests typically requires fasting before blood collection?
Blood glucose
ExplanationFasting ensures accurate measurement of glucose levels.
#12
What is the purpose of gently inverting a blood collection tube after filling it?
To ensure adequate mixing with anticoagulant
ExplanationPrevents clotting and ensures homogeneous mixing.
#13
Which anticoagulant is commonly used for routine blood collection?
EDTA
ExplanationBinds calcium, preventing blood clotting.
#14
What is the purpose of performing a 'fist clench' during capillary puncture?
To stimulate blood flow
ExplanationIncreases blood flow, aiding in sample collection.
#15
Which of the following additives is commonly used to preserve blood for immunohematology testing?
ACD solution
ExplanationPreserves red blood cells for longer duration.
#16
Which of the following veins is commonly used for venipuncture in elderly patients?
Brachial vein
ExplanationEasily accessible in elderly patients with fragile veins.
#17
Which blood collection tube is typically used for blood glucose testing?
Gray top
ExplanationContains sodium fluoride as an anticoagulant and preservative.