NHA Phlebotomy

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