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Laboratory > Ch 2 Methods of blood collection > Flashcards

Ch 2 Methods of blood collection Flashcards

(51 cards)

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1
Q

A method of blood collection by skin puncture

A

Capillary puncture

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2
Q

Blood collection method of choice in pediatric patients, extreme obesity, severe burns, and thrombotic tendencies

A

Capillary puncture

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3
Q

Capillary puncture collection sites

A

Heel, finger, earlobe, or toe

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4
Q

First choice of finger in capillary puncture

A

Middle

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5
Q

A blood collection procedure in the patient’s vein

A

Venipuncture

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6
Q

Best method of blood collection

A

Venipuncture

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7
Q

Primary source of specimen for clinical laboratory analyses

A

Venipuncture

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8
Q

Capillary puncture equipment

A

Sterile gauze pads

Alcohol/betadine solution

Lancet

Capillary tubes or QBC star tube

Bandage

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9
Q

Capillary puncture procedure is also known as

A

Fingerstick method

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10
Q

Prior to using a lancet, massage or “milk” the finger down toward the fingertip for how many times?

A

Repeat 5-6 times

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11
Q

Part of the finger used for the lancet

A

Side of the finger (off center), across the striations of the fingertip

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12
Q

Max depth of lancet should not exceed:

A

2mm

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13
Q

What should you do to avoid dilution of the specimen with tissue fluid?

A

Wipe away the first drop of blood

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14
Q

What kind of pressure should you use to receive blood from a fingerstick?

A

Gentle pressure, avoid squeezing

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15
Q

Obtain specimen with capillary tube placed:

A

Almost horizontally (15 degrees to finger tip)

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16
Q

Why do you not draw from IV lines?

A

It dilutes the specimen

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17
Q

Venipuncture equipment

A

Sterile-gauze pads

Alcohol/Betadine

Tourniquet

Vacutainer needle

Vacutainer holder

Vacutainer tubes

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18
Q

Venipuncture:

Patient position

A

Lying in bed or sitting in chair with arm propped up

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19
Q

Apply tourniquet around the patient’s arm above the antecubital area:

A

2-3 inches

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20
Q

Tourniquet

Use enough tension to:

A

Compress the vein but not the artery

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21
Q

Use blood pressure cuff on patients whose veins are difficult to find at:

22
Q

Venipuncture

Position patient’s arm:

Study These Flashcards
A

Extended with little to no flexion at the elbow

23
Q

If vein is difficult to find:

Study These Flashcards
A

Massage the arm with an upward motion to force blood into the vein

24
Q

Using a smooth continuous motion, introduce the needle at:

Study These Flashcards
A

15-degree, bevel up

25
Venipuncture Have the patient hold pressure for at least:
3 minutes
26
Liquid anticoagulant used in purple tops
Ethylenediaminetetraacetic Acid (EDTA)
27
Purple top labs
CBC Differential WBC
28
Most widely used anticoagulant
EDTA
29
Chelating agent used in a CBC that binds calcium so blood cannot clot
EDTA
30
Purple top specimens can be refrigerated for:
24 hours
31
Powder anticoagulant used in light blue tops
Sodium citrate
32
Light blue top labs
Prothrombin time (PT) Partial thromboplastin time (PTT)
33
Chelating agent used in a PTT that binds calcium
Sodium citrate
34
Liquid or powder anticoagulant used in green tops
Heparin
35
Typically used for plasma studies and chemistry testing - Ammonia - Adrenocorticotropic hormone (ACTH)
Green top
36
Inhibits the clotting enzyme, thrombin, by creating an antithrombin
Heparin
37
Anticoagulant used in red tops and tiger tops
NONE
38
Red top labs
Chemistry Serology Blood bank Other tests requiring serum
39
Contains serum separator gel
SST/Gold top, Tiger top, HIV tube (red/yellow)
40
Used in grey tops to inhibit glycolysis
Sodium fluoride
41
Grey top labs
Glucose studies ETOH level analysis
42
Prolonged application of a tourniquet will:
Produce a measurable increase in blood cell concentration (Hemoconcentration)
43
Using the wrong tube type:
Inability to perform test
44
Wrong draw order results in:
Possible contamination
45
What tubes should be drawn first?
non-additive tubes before tubes with additives
46
Fill additive-containing tubes in the following order:
Blood culture Blue top Red top SST (HIV) Green top Lavender top Grey top
47
Short fill of lab could:
Render the specimen unacceptable due to quantity not sufficient to perform test Improper anticoagulant/blood ratio
48
Not mixing the tube could result in:
Blood clots
49
Infection could be caused by:
Inadequate cleaning of area Treat with antibiotics, refer to MTF
50
Occurs when integrity of the vein is compromised. Blood is leaking into the tissues.
Hematoma
51
What should you do if there is a hematoma around the site?
Stop the procedure and apply pressure with clean gauze Have patient elevate arm

Laboratory (9 decks)

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