Nokea
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.
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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.
Activation of the needle safety device should occur when?
- A. Before the initial stick
- B. During the draw of blood
- C. Immediately after the tourniquet is released
- D. As soon as the needle is withdrawn
- E. After placing tape over the puncture site
Correct Answer: D
Rationale: Activating the safety device immediately after needle withdrawal prevents needlestick injuries.
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.
A patient who has had venipuncture performed will need more teaching if she says:
- A. I shouldn't lift anything heavy with this arm for an hour
- B. I will take the wrap off of my arm tomorrow morning
- C. I will hear from my doctor about my test results
- D. Yes, the name on the label is my name correctly spelled
Correct Answer: B
Rationale: The wrap should be removed after 10-15 minutes, not the next day, to avoid complications like bruising.
Which of these will always be drawn first if multiple tests are ordered?
- A. Blood cultures
- B. Light blue top
- C. Red top
- D. Lavender top
Correct Answer: A
Rationale: Blood cultures are drawn first to minimize contamination risk, as they require sterile technique.