#1
Which of the following veins is commonly used for venipuncture?
Cephalic vein
ExplanationCommonly used due to accessibility and size.
#2
What does the term 'phlebotomy' refer to?
Collection and handling of blood specimens
ExplanationProcess of obtaining blood for testing or donation.
#3
What does the term 'hemolysis' refer to in the context of phlebotomy?
Breakdown of red blood cells
ExplanationCaused by improper handling leading to sample contamination.
#4
What is the primary function of a tourniquet during venipuncture?
To dilate the vein
ExplanationFacilitates vein distension and makes it easier to locate.
#5
Which vein is commonly used for blood donation?
Median cubital vein
ExplanationProminent and easily accessible for blood collection.
#6
What is the appropriate procedure for disposing of used needles?
Placing in a sharps container
ExplanationEnsures safe disposal and prevents needle-stick injuries.
#7
Which of the following additives is used in blood collection tubes to prevent coagulation?
Heparin
ExplanationAnticoagulant that prevents blood from clotting.
#8
What is the purpose of 'warming' the site prior to venipuncture?
To dilate blood vessels
ExplanationIncreases blood flow and makes veins easier to locate.
#9
What is the primary purpose of a butterfly needle in phlebotomy?
To facilitate blood collection from small or fragile veins
ExplanationMinimizes trauma and discomfort during venipuncture.
#10
Which of the following is a complication associated with improper venipuncture technique?
Hematoma formation
ExplanationLocalized bleeding and bruising due to vein puncture.
#11
What is the typical gauge size of a needle used for routine venipuncture?
22 gauge
ExplanationBalances blood flow rate and patient comfort.
#12
Which antiseptic solution is commonly used for cleansing the site prior to venipuncture?
Chlorhexidine
ExplanationEffective against a wide range of microorganisms.
#13
Which of the following is an important step in ensuring patient safety during phlebotomy?
Verifying patient identification before drawing blood
ExplanationPrevents misidentification and potential harm to the patient.
#14
Which of the following is NOT a recommended site for capillary puncture?
Antecubital fossa
ExplanationCapillary puncture sites are typically on the fingertips or heel.
#15
What is the recommended order of draw when using multiple blood collection tubes?
Red, blue, green, lavender, gray
ExplanationPreserves sample integrity and prevents cross-contamination.
#16
Which of the following is a complication of prolonged tourniquet application?
Venous stasis
ExplanationSlowed or stopped blood flow leading to discomfort or complications.
#17
What is the recommended angle for inserting a needle during venipuncture?
45 degrees
ExplanationBalances ease of entry and vein integrity.
#18
What is the primary purpose of a Vacutainer system in phlebotomy?
To collect blood samples for testing
ExplanationFacilitates standardized blood collection and sample handling.