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Phlebotomy Class 2021 > Exam 4 > Flashcards

Exam 4 Flashcards

1
Q

What lab tests are performed using a light blue tube?

A

PT/INR

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2
Q

Needles are color-coded according to:

A

Gauge

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3
Q

Of the following tubes, which is filled last in the recommended order of draw?

A

Lavender Top

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4
Q

A light-blue topped tube is most often associated with tests in this department?

A

Coagulation

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5
Q

You are performing a vein puncture on a difficult vein using a butterfly needle. You have SST (red/tiger top) and light blue topped tube to collect. How do you proceed?

A

Draw a clear (discard) tube, fill and mix the light blue top, then fill and mix the SST

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6
Q

Which evacuated tube is suitable for blood culture collection?

A

yellow-sps

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7
Q

Which lab tests are performed using EDTA (lavender top)?

A

CCBC, HgbAlc

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8
Q

Which of the following would be the best choice of equipment for drawing a small hand vein?

A

23 gauge butterfly and ETS holder

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9
Q

Which evacuated tube must be filled to the correct level in order to maintain a 9-1 ratio of the blood to anticoagulation?

A

Light-blue

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10
Q

Why should a multi-sample needle with a broken seal not be used to draw blood?

A

it is not sterile

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11
Q

The additive in the lavender tube?

A

ethylenediaminetetraacetate acid

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12
Q

Tubes containing anticoagulants should be inverted immediately after filling tube:

A

prevent micro-clot formation

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13
Q

Which of the following substances would be the best thing to use to disinfect a blood spill on the lab counter-top prior to clean up?

A

1:10 solution of bleach

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14
Q

What is the purpose of a royal blue topped tube?

A

minimize trace-element contamination

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15
Q

Potassium oxalate/sodium fluoride; oxalate binds with calcium to prevent blood from clotting; sodium fluoride inhibits glycolysis and stabilizes glucose value up to 3 days

A

GRAY top

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16
Q

Contains no additive (may be used before drawing a light blue tube for coagulation) (PT/INR) when using a butterfly needle

A

RED top

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17
Q

Heparin (sodium/lithium): inhibits thrombin formation to prevent clotting

A

GREEN top

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18
Q

EDTA: binds with calcium to prevent clotting activator (serum) used to test trace elements

A

ROYAL BLUE top

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19
Q

Serum Separator Tube contains gel barrier and a clot activator (thrombin) to enhance clot formation

A

SST (MARBLE/TIGER) top

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20
Q

EDTA: (ethylenediaminetetraacetate): binds with calcium to prevent blood from clotting

A

LAVENDER top

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21
Q

Sodium Polyanethol Sulfonate prevents blood from clotting and stabilizes bacterial growth and is used for collecting Blood cultures

A

YELLOW - SPS top

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22
Q

Sodium Citrate: binds calcium to prevent blood from clotting; 9:1 ration of blood to anticoagulant is critical

A

LIGHT BLUE top

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23
Q

Which of the following tubes contains an anticoagulant that works by calcium?

A

light blue top

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24
Q

Which of the listed needle gauges has the smallest diameter?

A

22

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25
Tourniquets contaminated with visible blood should be:
disposed of in a bio-hazard bag
26
Which of the following would compromise the quality of the specimen received for testing?
partial filling of a sodium citrate tube
27
What does an antiglycolytic agent do?
prevents the breakdown of glucose
28
Which anticoagulant prevents coagulation by inhibiting thrombin formation?
heparin
29
Which of the following is NOT a desirable characteristic of a safety feature according to the FDA?
the safety feature device is an accessory and not attached
30
When should additive tubes be mixed (inverted)?
as soon as they are removed from the tube holder
31
All of the following chemicals are used as antiseptic EXCEPT:
formaldehyde
32
What causes evacuated tubes to fill with blood automatically?
premeasured tube vacuum
33
This needle is the standard needle for routine venipuncture:
21 gauge
34
Which of the following additives is not an anticoagulant?
thrombin
35
EDTA is an:
anticoagulant
36
Which activity is least likely to lead to failure to draw blood?
choosing a vein that has patency
37
For a routine vein puncture, the needle should be inserted into the arm
bevel up with a 15-30 degree angle
38
Where should the tourniquet be placed on the patient during venipuncture?
3-4 inches above the venipuncture site
39
Skin changes in elderly patients can make it harder to
anchor veins
40
Symptoms that needle-phobic patients can experience include all of the following EXCEPT
itching
41
You have an unidentified patient in the emergency room for a blood draw you should:
use a three part identification system to identify the patient by number or DOB
42
During a venipuncture, the needle should always be inserted with the
bevel side up
43
The single most important step in phlebotomy is
patient identification
44
After a venipuncture site is cleaned with alcohol, which of the following is the appropriate step?
Allow the site to air dry
45
The best way to judge the patency of a vein is to
press and release it several times to determine resilience
46
Which of the following is NOT required requisition information?
patient's social security number
47
A vein is anchored and held taut prior to venipuncture by
using the thumb below the puncture site
48
How can you tell that you are in a vein when using a butterfly?
blood usually appears in the tubing
49
Current CLSI/NCCLS guidelines recommend which of the following is done AFTER labeling an inpatient blood specimen?
compare the labeled tube with the patients armband
50
Why should the thumb not be used to palpate for an artery?
it contains a pulse
51
In which situation is a needle recapping recommended?
recapping of needles is never recommended
52
Bruising after a venipuncture may be prevented by
Applying direct pressure for 3 minutes
53
According to CLSI/NCCLS, prior to performing a venipuncture, the phlebotomist must verify any diet restrictions AND
latex allergies and history of fainting
54
A tourniquet is used in venipuncture to
find and enter veins more easily
55
A vein is palpated before performing the venipuncture to determine
direction, diameter, depth
56
Blood collection tubes are labeled
immediately after collection
57
A healthcare worker should do all of the following with regard to patient safety EXCEPT
leave bed rails down at the patient's request
58
The identification number on the patient's armband does not match the number on the requisition, you should
not draw blood until the discrepancy is resolved
59
The first choice for venipuncture site is
medial cubital vein
60
The best way to keep a vein from rolling is to
make certain to anchor the vein well
61
What is the most critical error a phlebotomist can make?
misidentifying a patient specimen
62
Which of the following is NOT required requisition information?
patients social security number

Phlebotomy Class 2021 (4 decks)

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