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Hematology 1 > Laboratory: Blood Collection > Flashcards

Laboratory: Blood Collection Flashcards

1
Q

The Clinical and Laboratory Standards Institute (CLSI) states that pressure should be applied using a clean gauze pad instead of cotton balls. True or False?

A

True

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2
Q

In the order of draw for venipuncture, which comes fourth?

A

Green

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3
Q

Microsampling is usually done on the following types of patients, except:

Infants less than 6 mos. old

Adult with palpable vein

Young children undergoing a test that requires small amount of blood

Burned patients

A

Adult with palpable vein

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4
Q

What will happen to the blood specimen if alcohol is left on the puncture site?

A

Hemolyze

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5
Q

Which of the following preparations is done for venipuncture using the ETS method?

twisting the needle with the barrel to make certain it fits securely

Inserting shorter end of the needle into the holder

moving the plunger up and down in the barrel once or twice to make certain it does not stick

All of the above

A

Inserting shorter end of the needle into the holder

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6
Q

In the order of draw for capillary specimens, which comes last?

A

No additives

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7
Q

What is the purpose of elevating the puncture site?

A

To prevent hematoma

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8
Q

The correct patient identification involves stating the patient’s full name and confirming it with the patient. True or False?

A

False

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9
Q

Which anticoagulant inhibits the activity of thrombin in preventing clot formation?

A

Heparin

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10
Q

What will happen if the tourniquet is applied more than one minute?

A

Hemoconcentration

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11
Q

All of the following are phlebotomy sites during skin puncture, except:

Heel of the foot

Ear lobe

4th finger

Middle finger

A

Ear lobe

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12
Q

Where is the phlebotomy site on an infant?

medial, plantar surface of the foot

lateral, plantar surface of the foot

Both

Neither

A

Both

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13
Q

Excessive EDTA causes _____.

A

Shrinkage of RBC

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14
Q

What is the difference between plasma and serum? Select all correct statements

Plasma is the liquid portion of a clotted blood

Plasma contains fibrinogen

Serum is the liquid portion of an anticoagulated blood

Serum does not contain fibrinogen

A

Plasma contains fibrinogen

Serum is the liquid portion of an anticoagulated blood

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15
Q

All of the following techniques are done to make the vein palpable, except:

Applying the tourniquet 3-4 inches below the bend of the elbow

Asking the patient to make a fist

Warming the puncture site

All of the above

A

Applying the tourniquet 3-4 inches below the bend of the elbow

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16
Q

What should be done first after collecting enough blood?

Release the tourniquet

Withdraw the needle

Apply pressure on the puncture site

Place a gauze on the site

A

Release the tourniquet

17
Q

What will happen if you pull the plunger with too much force?

may cause the blood to hemolyze

the force may pull the wall of the vein

the needle may be pulled out of the vein

All of the above

A

All of the above

18
Q

Which of the following is a consequence of excessive massaging of the puncture site?

dilution of blood with tissue juice

increased clot formation

erroneous test results

All of the above

A

All of the above

19
Q

_ of the blood is composed of formed elements

A

45%

20
Q

_ of the blood is the fluid portion, of which approx. 90% is _ and 10% is composed of _

A

55%
Water
Proteins

21
Q

When coagulation is prevented by the use of an anticoagulant, the liquid portion of the blood is termed _, it contains fibrinogen

A

Plasma

22
Q

If a blood specimen is allowed to clot, the liquid portion released from the clot is called _ and does not contain any fibrinogen

A

Serum

23
Q

Betadine should be routinely used to clean the
phlebotomy area. True or False?

A

False.

Rationale: Betadine causes erroneous test results

24
Q

Excessive crying will affect some test results such as increasing _

A

WBC

25
Q

The thumb, big toe, and ear lobe should not be used as
a skin puncture site for phlebotomy. True or False?

A

True

26
Q

Order of Draw for Capillary Specimen

A

Blood gases
EDTA
Other anticoagulation tubes
Non-additive or serum

27
Q

Order of draw for Venous Specimen

A

Yellow (SPS or Culture bottle)
Light blue (Citrate)
Red (Non-additive)
Green (Heparin)
Lavender (EDTA)
Gray (Fluoride)

28
Q

Shrinkage of RBC leads to

A

Decreased hematocrit
Increased MCHC
Falsely-low ESR

29
Q

Dry EDTA is known as

A

Dipotassium

30
Q

Liquid EDTA is known as

A

Tripotassium

Hematology 1 (13 decks)

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