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Phlebotomy > Lesson 8 - Capillary Collection > Flashcards

Lesson 8 - Capillary Collection Flashcards

1
Q

Where does venous blood come from?

A

The antecubital fossa/space

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2
Q

Where does capillary blood come from?

A

The finger or heel

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3
Q

Capillary blood only contains blood from the hand. True or false?

A

False, it contains blood from blood the vein and other fluids.

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4
Q

Capillary is also known as dermal and is used commonly for tests. True or false?

A

True

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5
Q

Which is the preferred method for drawing blood from newborns-2 years old?
A. Venous
B. Capillary

A

B. Capillary or hands

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6
Q

Geriatric patients, patients who have frequent blood tests, and obese patients all have what in common?

A

They are subject to capillary collection method due to their issues of having small fragile veins, frequently tested, and unable to locate veins.

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7
Q

What tests CANNOT use capillary lood?

A

Blood culture and routine coagulation tests

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8
Q

Name the puncture equipment used for capillary collection
Hint: there are 4

A

Lancet (finger puncture device), laser puncture device, microsamples tube for collection), micro collection tubes (microtainer tubes), and microhematocrit tubes(being replaced by microtainers)

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9
Q

What is the order of collection for the capillary tubes?
A. There is no order
B. Green, blue, red, lavender, and then others
C. Blue, lavender, green, red then all others

A

C. Blue, lavender, green, red, then all others

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10
Q

What additive does the lavender tubes have?

A

EDTA

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11
Q

What additive does the green collection tube have?

A

Heparin

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12
Q

What additive does the red collection tube have?

A

Clot activators

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13
Q

POV: You are a phlebotomist who just received a requisition to draw a capillary sample from a patient, but they are not in their room when you arrive. What do you do?

A

After receiving you requisition, gather the materials you need: gauze, sharps container, collection micro-tubes (lavender green, red, and others), bandages, warming device, tourniquet, needles, WIS, and syringe and holder.

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14
Q

Finger puncture devices are multiple use?

A

False, it is disposable and/or single use

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15
Q

Capillary tubes also known as

A

Hematocrit tubes

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16
Q

Red band and blue bands on capillary tubes mean what?

A

Red has additive heparin to prevent clotting and blue does not

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17
Q

What is the max. depth of a finger puncture?

A

No more than 3 mm

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18
Q

What is the max. depth of a heel stick?

A

2mm for heel stick

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19
Q

What is the max. depth of a heel stick for a new born baby?

A

0.65-0.88mm for a newborn heel stick

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20
Q

Which fingers are the best to draw from?

A

Middle or ring finger

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21
Q

Children younger than ___ should be considered for heel sticks.

A

Younger than 1 year of age

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22
Q

What should you do when your patients’ hands are cold before blood collection?

A

Use a warmer device for 3-5 minutes and massage the palm gently

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23
Q

Why should you not squeeze the punctured finger?

A

Can cause hemolysis

24
Q

How should you puncture the finger?

A

Perpendicular to the finger prints or across the fingerprints not in line

25
Q

How many second should you wait to pull the puncture device back?

A

2 seconds

26
Q

How should you collect the capillary sample once blood is flowing?

A

Hold the microtainer side ways and allow the blood to slide down the side of the tube into the container to prevent hemolysis. Then close lid and invert

27
Q

What is the blue microtube used for?

A

Platelet count tests

28
Q

What is the lavender microtube used for?

A

CBC or complete blood count and hematology tests

29
Q

What is the red, green, and gray microtubes used for?

A

Chemistry tests

30
Q

Always use the dominant hand to perform a capillary stick. True or false?

A

False, always use the non-dominant hand

31
Q

What should you seal the end of the hematocrit tube with?

A

Sealing clay

32
Q

You should never note the position of the hematocrit tubes inside if the centrifuge. True or false?

A

False, always take note of the positioning of each tube

33
Q

What should you set the centrifuge to with hematocrit tubes inside?

A

11,000-12,000 for about 5 minutes

34
Q

When should you open the centrifuge?

A

After it has come to a complete stop

35
Q

What happens after you take the hematocrit tubes out of the centrifuge?

A

Place the tubes in a microhematocrit reader

36
Q

How do you align/position a hematocrit tube?

A

Align the sealed end of the capillary tube with the zero line and the plasma meniscus with the 100% line

37
Q

How do you read a hematocrit tube?

A

Take the reading from where the RBCs and the buffy coat meet, but do not include the buffy coat

38
Q

After recording the results from both capillary tubes how do you determine the results?

A

By taking the average of the 2 scores and record the result
(add them together, then divide by 2)

39
Q

What is BT?

A

Bleeding Time test that is used to determine the amount of time is takes for bleeding to stop and hemostasis

40
Q

Why are BT tests not commonly used anymore?

A

They are known to be inconsistent so they may be replaced with PFA (Platelet Function Assay) tests now

41
Q

What method should you use for a BT test?

A

A puncture method using the antecubital space for venous blood with a DEPTH of 1mm and WIDTH of 5mm puncture device

42
Q

What materials do you need for a BT test?

A

Gloves, sharps container, BP cuff, bandages, alcohol pads, filter papers, stopwatch, and automated BT device

43
Q

For bleeding time tests, select a site 5 cm below the antecubital crease that is free of…
Hint: free of 4 things

A

veins, scars, hair, and bruises

44
Q

Before completing a bleeding time test, ask the patient about what medications they are taking that could interfere with what?

A

Clotting

45
Q

What is a bedside test to determine blood glucose level, performed by dermal puncture?

A

Ancillary blood glucose tests

46
Q

What is a test that measures the length of time required to stop after an incision is made?

A

Bleeding Time

47
Q

What is a group of tests that may be elevated by use of povidone iodine?

A

Bilirubin, uric acid, phosphorus, and potassium (BURPP)

48
Q

What is another name for the heel bone?

A

Calcaneus

49
Q

What are small plastic tubes used primarily for hematocrit tests or also known as microhematic crit tubes?

A

Capillary tubes.

50
Q

What are micropipets or large glass capillary tubes?

A

Caraway or Natelson pipets

51
Q

What are small tubes used to collect dermal puncture samples, also known as a “bullet”

A

Microcollection tubes

52
Q

What is small, painful inflammation of the bone or cartilage called?

A

Osteochondritis

53
Q

Medical term for a bone infection

A

Osteomyelitis

54
Q

Medical term for formation of a blood clot within a vein

A

Vein thrombosis

55
Q

A warming device can reach only up to how many degrees?

A

42 degrees Celsius or 107 degrees Fahrenheit

56
Q
A

Phlebotomy (17 decks)

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