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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
Q

Tourniquets contaminated with visible blood should be:

A

disposed of in a bio-hazard bag

26
Q

Which of the following would compromise the quality of the specimen received for testing?

A

partial filling of a sodium citrate tube

27
Q

What does an antiglycolytic agent do?

A

prevents the breakdown of glucose

28
Q

Which anticoagulant prevents coagulation by inhibiting thrombin formation?

A

heparin

29
Q

Which of the following is NOT a desirable characteristic of a safety feature according to the FDA?

A

the safety feature device is an accessory and not attached

30
Q

When should additive tubes be mixed (inverted)?

A

as soon as they are removed from the tube holder

31
Q

All of the following chemicals are used as antiseptic EXCEPT:

A

formaldehyde

32
Q

What causes evacuated tubes to fill with blood automatically?

A

premeasured tube vacuum

33
Q

This needle is the standard needle for routine venipuncture:

A

21 gauge

34
Q

Which of the following additives is not an anticoagulant?

A

thrombin

35
Q

EDTA is an:

A

anticoagulant

36
Q

Which activity is least likely to lead to failure to draw blood?

A

choosing a vein that has patency

37
Q

For a routine vein puncture, the needle should be inserted into the arm

A

bevel up with a 15-30 degree angle

38
Q

Where should the tourniquet be placed on the patient during venipuncture?

A

3-4 inches above the venipuncture site

39
Q

Skin changes in elderly patients can make it harder to

A

anchor veins

40
Q

Symptoms that needle-phobic patients can experience include all of the following EXCEPT

A

itching

41
Q

You have an unidentified patient in the emergency room for a blood draw you should:

A

use a three part identification system to identify the patient by number or DOB

42
Q

During a venipuncture, the needle should always be inserted with the

A

bevel side up

43
Q

The single most important step in phlebotomy is

A

patient identification

44
Q

After a venipuncture site is cleaned with alcohol, which of the following is the appropriate step?

A

Allow the site to air dry

45
Q

The best way to judge the patency of a vein is to

A

press and release it several times to determine resilience

46
Q

Which of the following is NOT required requisition information?

A

patient’s social security number

47
Q

A vein is anchored and held taut prior to venipuncture by

A

using the thumb below the puncture site

48
Q

How can you tell that you are in a vein when using a butterfly?

A

blood usually appears in the tubing

49
Q

Current CLSI/NCCLS guidelines recommend which of the following is done AFTER labeling an inpatient blood specimen?

A

compare the labeled tube with the patients armband

50
Q

Why should the thumb not be used to palpate for an artery?

A

it contains a pulse

51
Q

In which situation is a needle recapping recommended?

A

recapping of needles is never recommended

52
Q

Bruising after a venipuncture may be prevented by

A

Applying direct pressure for 3 minutes

53
Q

According to CLSI/NCCLS, prior to performing a venipuncture, the phlebotomist must verify any diet restrictions AND

A

latex allergies and history of fainting

54
Q

A tourniquet is used in venipuncture to

A

find and enter veins more easily

55
Q

A vein is palpated before performing the venipuncture to determine

A

direction, diameter, depth

56
Q

Blood collection tubes are labeled

A

immediately after collection

57
Q

A healthcare worker should do all of the following with regard to patient safety EXCEPT

A

leave bed rails down at the patient’s request

58
Q

The identification number on the patient’s armband does not match the number on the requisition, you should

A

not draw blood until the discrepancy is resolved

59
Q

The first choice for venipuncture site is

A

medial cubital vein

60
Q

The best way to keep a vein from rolling is to

A

make certain to anchor the vein well

61
Q

What is the most critical error a phlebotomist can make?

A

misidentifying a patient specimen

62
Q

Which of the following is NOT required requisition information?

A

patients social security number

Phlebotomy Class 2021 (4 decks)

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