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You are here: Home / Laboratory Quizzes / The Quizzes about Principles of Blood Collection

The Quizzes about Principles of Blood Collection

December 6, 2018 January 23, 2019 MedQuizzes 0 Comment

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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

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

Correct! Wrong!

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

Correct! Wrong!

The appropriate veins for performing a routine venipuncture are the

Correct! Wrong!

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

Correct! Wrong!

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

Correct! Wrong!

A hematoma can form if

Correct! Wrong!

Phlebotomy problems can include

Correct! Wrong!

Which of the following skin puncture areas is (are) acceptable for the collection of capillary blood from an infant?

Correct! Wrong!

The proper collection of capillary blood includes

Correct! Wrong!

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A peripheral blood smear can be prepared from

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Identify the characteristic(s) of a good peripheral blood smear.

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Poor blood smears can be caused by

Correct! Wrong!

If a blood smear is too long, the problem can be resolved by

Correct! Wrong!

The examination of bone marrow is useful in

Correct! Wrong!

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Appropriate bone marrow aspiration sites in an adult are the

Correct! Wrong!

If a blood smear stains too red on microscopic examination of a Wright-stained preparation, possible causes include that

Correct! Wrong!

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1. When the coagulation of fresh whole blood is prevented through the use of an anticoagulant, the straw-colored fl uid 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
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
16. A hematoma can form if
A. improper pressure is applied to a site after the venipuncture
B. the patient suddenly moves and the needle comes out of the vein
C. the needle punctures both walls of the vein
D. all of the above
17. Phlebotomy problems can include
A. the use of improper anticoagulants
B. misidentification of patients
C. improper angle of the needle or having the needle up against the side of the vessel wall

D. all of the above

18. Which of the following skin puncture areas is (are) acceptable for the collection of capillary blood from an infant?
A. Previous puncture site
B. Posterior curve of the heel
C. The arch
D. Medial or lateral plantar surface
19. The proper collection of capillary blood includes
A. wiping away the fi rst drop of blood
B. occasionally wiping the site with a plain gauze pad to avoid the buildup of platelets
C. avoiding the introduction of air bubbles into the column of blood in a capillary collection tube
D. all of the above
20. A peripheral blood smear can be prepared from
A. EDTA-anticoagulated blood within 1 hour of collection
B. free-flowing capillary blood
C. citrated whole blood
D. both A and B
21. Identify the characteristic(s) of a good peripheral blood smear.
A. It progresses from thick at the point of origin to thin.
B. It has a blunt feathered termination.
C. The outer margins do not touch the edges of the slide.
D. All of the above
22. Poor blood smears can be caused by
A. a delay in preparing the smear once the drop of blood has been placed on the slide
B. a drop of blood that is too large or too small
C. holding the pusher slide at the wrong angle and poor drying conditions
D. all of the above
23. If a blood smear is too long, the problem can be resolved by
A. decreasing the angle of the pusher slide
B. increasing the angle of the pusher slide
C. using a larger drop of blood
D. pushing the slide slower in smearing out the blood
24. The examination of bone marrow is useful in
A. diagnosing a bleeding disorder
B. diagnosing some disorders associated with erythrocytes and leukocytes
C. diagnosing acute leukemias
D. both B and C
25. Appropriate bone marrow aspiration sites in an adult are the
A. anterior and posterior iliac crest
B. sternum and posterior iliac crest
C. tibia and sternum
D. both A and B
33. If a blood smear stains too red on microscopic examination of a Wright-stained preparation, possible causes include that
A. the staining time was too long
B. the stain was too basic
C. the buffer was too acidic and the exposure time was too short
D. the buffer was too basic and the exposure time was too long

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