#1
Which tube is typically used for coagulation studies?
Blue top tube
ExplanationContains sodium citrate, which prevents blood clotting by binding calcium ions.
#2
Which anticoagulant is present in a lavender top tube?
EDTA
ExplanationBinds calcium ions, preventing blood clotting by chelating them.
#3
What does the term 'venipuncture' refer to in phlebotomy?
Drawing blood from a vein
ExplanationCommonly used method for obtaining blood samples for diagnostic testing.
#4
What does the term 'hemolysis' refer to in blood collection?
Breakdown of red blood cells
ExplanationCan affect test results by releasing intracellular contents into the plasma.
#5
Which of the following tubes is used for blood glucose testing?
Red top tube
ExplanationNo anticoagulant; blood clotting is not necessary for glucose testing.
#6
Which anticoagulant is present in a blue top tube?
EDTA
ExplanationPrimarily used for trace metal analysis, not blood collection.
#7
Which additive is present in a gray top tube?
Sodium fluoride
ExplanationPreserves glucose levels by inhibiting glycolysis.
#8
Which tube is used for blood alcohol level testing?
Gray top tube
ExplanationPreserves blood for alcohol analysis by inhibiting glycolysis.
#9
What is the purpose of a tourniquet during blood collection?
To increase blood flow to the area
ExplanationFacilitates easier vein identification and blood withdrawal.
#10
Which anticoagulant is present in a green top tube?
Lithium heparin
ExplanationInhibits clotting by enhancing antithrombin activity.
#11
Which type of tube is used for blood gas analysis?
Light blue top tube
ExplanationContains heparin, which inhibits clotting by enhancing antithrombin activity.
#12
Which tube is used for erythrocyte sedimentation rate (ESR) testing?
Purple top tube
ExplanationContains EDTA, which prevents blood clotting by chelating calcium ions.
#13
Which of the following tubes is used for lead testing?
Royal blue top tube
ExplanationContains EDTA or heparin as an anticoagulant.
#14
Which anticoagulant is present in a yellow top tube?
Sodium polyanethol sulfonate (SPS)
ExplanationPrevents blood clotting by binding calcium ions.
#15
What is the primary purpose of a syringe versus a vacuum tube system for blood collection?
To allow for a more controlled collection process
ExplanationSuitable for small or fragile veins, or when precise volumes are needed.
#16
Which additive is present in a black top tube?
Sodium polyanethol sulfonate (SPS)
ExplanationPrevents clotting by binding calcium ions and inhibits bacterial growth.