#1
Which of the following veins is commonly used for venipuncture?
Brachial vein
Femoral vein
Cephalic vein
Popliteal vein
#2
What is the purpose of using a tourniquet during venipuncture?
To numb the area
To dilate the vein
To clean the skin
To restrict blood flow
#3
What is the purpose of palpating a vein before venipuncture?
To sterilize the area
To identify the patient
To assess vein size and depth
To prevent hemolysis
#4
Which vein is often used for venipuncture when other options are limited, especially in pediatric patients?
Median cubital vein
Dorsal venous arch
Great saphenous vein
Temporal vein
#5
What is the primary reason for discarding the first few milliliters of blood during venipuncture?
To avoid contamination by skin cells
To prevent clotting in the collection tube
To reduce the risk of hemolysis
To ensure accurate test results
#6
What is the recommended site for capillary puncture in adults?
Lateral aspect of the fingertip
Palmar surface of the hand
Dorsal aspect of the wrist
Medial aspect of the forearm
#7
Which of the following anticoagulants is commonly used in blood collection tubes?
Heparin
Warfarin
Aspirin
Ibuprofen
#8
What is the primary reason for using a butterfly needle during phlebotomy?
To access difficult veins
To collect larger volumes of blood
To minimize patient discomfort
To prevent hematoma formation
#9
Which of the following is a potential complication of improper tourniquet application?
Hematoma
Hemolysis
Thrombosis
Ecchymosis
#10
What is the primary purpose of a butterfly needle in phlebotomy?
To draw large volumes of blood quickly
To facilitate blood clotting
To minimize pain during venipuncture
To collect capillary blood samples
#11
What is the primary purpose of the order of draw in phlebotomy?
To maintain patient comfort
To prevent sample contamination
To facilitate laboratory processing
To expedite the phlebotomy procedure
#12
Which factor contributes to the formation of a hematoma during venipuncture?
Proper needle gauge
Immediate removal of tourniquet
Inadequate pressure on the puncture site
Firmly anchoring the needle during insertion
#13
Which of the following factors can lead to hemolysis during blood collection?
Using a large-gauge needle
Mixing the blood gently after collection
Collecting blood into an EDTA tube
Applying excessive force to the syringe plunger
#14
Which color tube is typically used for coagulation studies?
#15
What is the correct order of draw for capillary blood collection?
Blue, Red, Green
Lavender, Green, Yellow
Red, Green, Blue
Microtainer, Lavender, Green
#16
What is the purpose of the additive EDTA in blood collection tubes?
Promote clotting
Prevent clotting
Preserve glucose levels
Enhance antibody detection
#17
Which technique is commonly used for capillary puncture in infants?
Basilic vein approach
Lancet puncture on the fingertip
Syringe aspiration from the antecubital vein
Butterfly needle insertion in the radial artery
#18
In phlebotomy, what does the term 'venous stasis' refer to?
The speed of blood flow in veins
The collapse of veins
The pooling of blood in veins
The dilation of veins