FREEE ASCP Orders and Equipment Selection

Question 1

In what situation is a butterfly needle a better option than a vacutainer system?

Accepted Answer

the patient has small or fragile veins

Answer

A butterfly needle has a smaller gauge needle and flexible tubing, which reduces trauma to delicate veins. This design makes it ideal for venipuncture in patients with small, fragile, or difficult-to-access veins, such as pediatric or geriatric patients, or those undergoing chemotherapy. Its precise control helps prevent vein collapse and improves patient comfort.

Question 2

Which anticoagulant is used in a tube that has a gray stopper?

Accepted Answer

sodium fluoride and thymol

Answer

Tubes with a gray stopper are primarily used for glucose testing. Sodium fluoride acts as an antiglycolytic agent, preventing glucose metabolism by red blood cells, thus preserving the glucose concentration in the sample. Thymol is also an antiglycolytic agent, further enhancing the preservation of glucose for accurate measurement.

Question 3

Which glass tube among the following is additive-free?

Accepted Answer

a tube with a red top

Answer

Red-top tubes are typically plain glass tubes that contain no additives, anticoagulants, or gels. They are used to collect serum for various chemistry tests, serology, and blood banking procedures where clotting is desired and no interference from additives is needed. The blood clots naturally, and the serum is then separated.

Question 4

Which of the following is regarded as appropriate approach when cleaning a site before venipuncture?

Accepted Answer

start at the planned venipuncture site and work your way outward in circular motions.

Answer

This cleaning technique ensures that microorganisms are moved away from the intended puncture site, minimizing the risk of contamination and infection. Starting at the center and moving outwards prevents reintroducing bacteria from the surrounding skin back into the clean area. This aseptic technique is critical for patient safety during venipuncture.

Question 5

What kind of anticoagulant is contained in a tube with a light-blue stopper?

Accepted Answer

sodium citrate

Answer

Light-blue stopper tubes contain sodium citrate, which acts as an anticoagulant by binding to calcium ions, essential for the clotting cascade. These tubes are specifically used for coagulation studies, such as Prothrombin Time (PT) and Activated Partial Thromboplastin Time (APTT), because the sodium citrate preserves the clotting factors accurately. The specific concentration of sodium citrate is crucial for these tests.

ASCP Phlebotomy Technician Exam Practice Test

ASCP Phlebotomy Technician Exam Practice Test

FREEE ASCP Orders and Equipment Selection