CHAPTER 2 PRINCIPLES OF BLOOD COLLECTION

1. When the coagulation of fresh whole blood is prevented through the use of an anticoagulant, the straw-colored fluid that can be separated from the cellular elements is

• A. serum
• B. plasma
• C. whole blood
• D. platelets

2. Which characteristic is inaccurate with respect to the anticoagulant K3 EDTA?

• A. Removes ionized calcium (Ca2+) from fresh whole blood by the process of chelation
• B. Is used for most routine coagulation studies
• C. Is the most commonly used anticoagulant in hematology
• D. Is conventionally placed in lavender-stoppered evacuated tubes

3. Heparin inhibits the clotting of fresh whole blood by neutralizing the effect of

• A. platelets
• B. ionized calcium (Ca2+)
• C. fibrinogen
• D. thrombin

EDTA

• A. RED
• B. LAVENDER
• C. BLUE
• D. GREEN

Heparin

• A. RED
• B. LAVENDER
• C. BLUE
• D. GREEN

Sodium citrate

• A. RED
• B. LAVENDER
• C. BLUE
• D. GREEN

No anticoagulant

• A. RED
• B. LAVENDER
• C. BLUE
• D. GREEN

13. The appropriate veins for performing a routine venipuncture are the

• A. cephalic, basilic, and median cubital
• B. subclavian, iliac, and femoral
• C. brachiocephalic, jugular, and popliteal
• D. saphenous, suprarenal, and tibial

14. A blood sample is needed from a patient with IV fluids running in both arms. Which of the following is an acceptable procedure?

• A. Any obtainable vein is satisfactory.
• B. Obtain sample from above the IV site.
• C. Obtain sample from below the IV site with special restrictions.
• D. Disconnect the IV line.
• E. Do not draw a blood specimen.

15. The bevel of the needle should be held _____ in the performance of a venipuncture.

• A. sideways
• B. upward
• C. downward
• D. in any direction