Nokea
A patient has several blood tests ordered. You have gathered the correct tubes, which include a red top, green top, and light blue top. In which order will you draw them?
- A. Green, red, light blue
- B. Light blue, green, red
- C. Red, light blue, green
- D. Light blue, red, green
Correct Answer: D
Rationale: The order of draw is light blue (citrate), red (serum), green (heparin) to prevent cross-contamination.
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A 'good' vein for phlebotomy should meet which of the following criteria?
- A. It should feel bouncy
- B. It should feel rigid
- C. It should feel knobby
- D. It should feel elastic
Correct Answer: A,D
Rationale: A good vein feels bouncy and elastic, indicating it is pliable and suitable for venipuncture.
When performing phlebotomy using a needle and syringe, drawing back on the plunger can result in which of the following complications?
- A. Collapse of vein
- B. Hematoma
- C. Infection of site
- D. Rolling the vein
- E. Blowing the vein
Correct Answer: A,B
Rationale: Excessive plunger pull can collapse the vein or cause a hematoma by damaging the vessel wall.
The tourniquet should be applied where in relation to the intended puncture site?
- A. 6 inches distal to the site
- B. 3 inches distal to the site
- C. 6 inches proximal to the site
- D. 3 inches proximal to the site
Correct Answer: D
Rationale: The tourniquet is applied 3 inches proximal to the puncture site to engorge the vein for easier access.
When selecting a vein for phlebotomy, which of the following are true?
- A. Use the vein that looks the largest, no matter what its condition
- B. Avoid areas where the vein is crooked or feels hard and ropelike
- C. The site of choice is the dorsal side of the hand
- D. Use the right arm of a patient who has had a left mastectomy
- E. Use the right arm of a patient who has an IV in the right arm
Correct Answer: B,D
Rationale: Avoiding hard, crooked veins and using the non-mastectomy arm ensures safe and effective venipuncture.
When performing a dermal puncture for blood sugar on an adult patient, where should the puncture be made?
- A. On the lateral aspect of the heel
- B. On the lateral aspect of the finger tip
- C. On the end of the fingertip
- D. On the left earlobe
Correct Answer: B
Rationale: The lateral aspect of the fingertip is the preferred site for dermal puncture in adults to minimize pain and ensure adequate blood flow.