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WorksheetsNHA Phlebotomy
Total questions: 15
Worksheet time: 15mins
What part of blood is responsible for carrying oxygen and carbon dioxide to or from body cells?
RBCs
WBCs
Platelet
Plasma
A tourniquet is used in venipuncture to:
concentrate the blood specimen
find and enter veins more easily
keep the vein from collapsing
all of the above
What causes evacuated tubes to fill with blood automatically?
Arterial blood pressure
Fist pumping by the patient
Premeasured tube vacuum
Pressure from the tourniquet
Lavender-top tubes are most commonly used to collect:
chemistry tests
coagulation specimens
hematology tests
immunology tests
Tiny red spots that appear on a patient’s arm when the tourniquet is applied are a sign that the:
patient is allergic to latex
patient is anemic
site may bleed excessively
tourniquet is too tight
Which of the following situations can result in hemoconcentration?
Drawing a large tube with a small needle
Mixing the specimen too vigorously
Leaving the tourniquet on over 1 minute
Partially filling a normal-draw tube
Which of the following needles has the largest bore diameter?
18 gauge
21 gauge
20 gauge
23 gauge
What is the primary function of a phlebotomist in a clinical setting?
To diagnose diseases
To collect blood samples
To administer medication
To perform surgery
Which of the following is a common site for venipuncture?
Carotid artery
Femoral artery
Median cubital vein
Radial artery
What is the purpose of using an anticoagulant in blood collection tubes?
To promote clotting
To prevent clotting
To enhance oxygenation
To increase blood flow
Which blood component is primarily responsible for clotting?
Red blood cells
White blood cells
Platelets
Plasma
What is the standard gauge size for a needle used in adult venipuncture?
16 gauge
18 gauge
21 gauge
25 gauge
Why is it important to label blood samples immediately after collection?
To ensure accurate patient identification
To prevent contamination
To speed up processing
To reduce hemolysis
What is the effect of hemolysis on a blood sample?
Increases red blood cell count
Decreases white blood cell count
Alters test results
Enhances plasma clarity
Which of the following is a potential complication of improper tourniquet application?
Increased blood flow
Hemoconcentration
Decreased blood pressure
Improved vein visibility
