#1
Which of the following is a proper phlebotomy technique?
Inserting the needle at a 90-degree angle
ExplanationProper angle ensures correct blood draw.
#2
What is the primary purpose of a tourniquet in phlebotomy?
To dilate the vein
ExplanationAids vein visibility and accessibility.
#3
What is the recommended site for capillary puncture in infants?
Heel
ExplanationProvides adequate blood volume.
#4
Which of the following is NOT a recommended step during the pre-analytical phase of laboratory testing?
Mixing the blood sample vigorously
ExplanationMay cause hemolysis or clots.
#5
What is the purpose of a centrifuge in laboratory procedures?
To separate blood components
ExplanationSeparates plasma or serum from cells.
#6
What is the purpose of a lancet in capillary puncture?
To make a small puncture in the skin
ExplanationAllows blood collection from capillaries.
#7
Which laboratory test typically requires a fasting period for accurate results?
Lipid profile
ExplanationFood intake affects lipid levels.
#8
What is the function of an anticoagulant in blood collection tubes?
To prevent clotting
ExplanationMaintains blood's liquid state.
#9
Which of the following is a symptom of phlebotomy-induced hemolysis?
Increased lactate dehydrogenase (LDH) levels
ExplanationIndicates red blood cell destruction.
#10
What is the purpose of quality control in laboratory procedures?
To ensure accurate and reliable test results
ExplanationMaintains precision and consistency.
#11
Which of the following is a potential complication of prolonged tourniquet application during venipuncture?
Hemolysis
ExplanationRupture of red blood cells.
#12
What is the primary purpose of a clot activator in blood collection tubes?
To promote blood clotting
ExplanationInitiates coagulation process.
#13
Which vein is commonly used for venipuncture in adults?
Median cubital vein
ExplanationLarge and easily accessible vein.
#14
Which of the following is a common complication of phlebotomy?
Hematoma
ExplanationLocalized blood clot under the skin.
#15
In what order should blood collection tubes be filled during a venipuncture procedure?
Red, green, yellow, lavender
ExplanationPreserves sample integrity and prevents contamination.
#16
Which laboratory test measures the concentration of hemoglobin in the blood?
Complete blood count (CBC)
ExplanationIncludes hemoglobin assessment.
#17
What is the purpose of a coagulation test?
To measure blood clotting ability
ExplanationAssesses hemostasis.
#18
What does the abbreviation CBC stand for in laboratory medicine?
Complete blood count
ExplanationQuantifies blood cell types.