Nokea
Explain the purpose of applying a tourniquet for phlebotomy.
- A. To restrict blood flow
- B. To dilate veins for easier access
- C. To prevent hemolysis
- D. To stabilize the needle
Correct Answer: B
Rationale: A tourniquet is applied to temporarily restrict venous blood flow, causing veins to dilate and become more visible and accessible for phlebotomy.
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Which one of the following statements is not accurate when describing veins and arteries?
- A. Veins have valves; arteries do not.
- B. Valves control the direction of blood flow in veins.
- C. Arteries have higher blood pressure than veins.
- D. Veins have thicker walls than arteries.
- E. Veins must fight against gravity to return blood to the heart.
Correct Answer: D
Rationale: Veins have thinner walls than arteries, which have thicker walls to withstand higher blood pressure.
What action(s) will help to protect you from bloodborne pathogens during phlebotomy?
- A. Washing your hands prior to the procedure
- B. Washing your hands after the procedure
- C. Wearing gloves during the procedure
- D. Activating the needle safety device immediately after removing your gloves
Correct Answer: A,B,C
Rationale: Hand washing before and after the procedure and wearing gloves during it are standard precautions to protect against bloodborne pathogens. The needle safety device should be activated immediately after use, not after removing gloves.
Which of the following statements is(are) accurate regarding veins?
- A. Veins are deeper than arteries.
- B. Veins carry deoxygenated blood.
- C. Veins carry blood back to the heart.
- D. Vein walls are thicker than arterial walls.
Correct Answer: B,C
Rationale: Veins carry deoxygenated blood back to the heart, while arteries carry oxygenated blood away. Vein walls are thinner, not thicker, than arterial walls.
Which of the following is most important when assessing for a suitable vein to use for venipuncture?
- A. Your vision
- B. Your sense of touch
- C. Whether the patient is left- or right-handed
- D. Whether the vein is deep or shallow
Correct Answer: B
Rationale: The sense of touch is critical for assessing vein suitability, as it allows the phlebotomist to feel for a vein's size, elasticity, and depth.
Why is it important that you tell the patient exactly what you are about to do before you begin?
- A. To gain the patient's cooperation
- B. To delay the start of the task
- C. To reduce patient anxiety
- D. To demonstrate your knowledge
Correct Answer: A,C
Rationale: Informing the patient about the procedure helps gain their cooperation and reduces anxiety by setting clear expectations and building trust.