Lesson 8 - Capillary Collection

Question 1

Where does venous blood come from?

Answer 1

The antecubital fossa/space

Question 2

Where does capillary blood come from?

Answer 2

The finger or heel

Question 3

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

Answer 3

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

Question 4

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

Answer 4

True

Question 5

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

Answer 5

B. Capillary or hands

Question 6

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

Answer 6

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

Question 7

What tests CANNOT use capillary lood?

Answer 7

Blood culture and routine coagulation tests

Question 8

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

Answer 8

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

Question 9

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

Answer 9

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

Question 10

What additive does the lavender tubes have?

Answer 10

EDTA

Question 11

What additive does the green collection tube have?

Answer 11

Heparin

Question 12

What additive does the red collection tube have?

Answer 12

Clot activators

Question 13

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?

Answer 13

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.

Question 14

Finger puncture devices are multiple use?

Answer 14

False, it is disposable and/or single use

Question 15

Capillary tubes also known as

Answer 15

Hematocrit tubes

Question 16

Red band and blue bands on capillary tubes mean what?

Answer 16

Red has additive heparin to prevent clotting and blue does not

Question 17

What is the max. depth of a finger puncture?

Answer 17

No more than 3 mm

Question 18

What is the max. depth of a heel stick?

Answer 18

2mm for heel stick

Question 19

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

Answer 19

0.65-0.88mm for a newborn heel stick

Question 20

Which fingers are the best to draw from?

Answer 20

Middle or ring finger

Question 21

Children younger than ___ should be considered for heel sticks.

Answer 21

Younger than 1 year of age

Question 22

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

Answer 22

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

Question 23

Why should you not squeeze the punctured finger?

Answer 23

Can cause hemolysis

Question 24

How should you puncture the finger?

Answer 24

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

Question 25

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

Answer 25

2 seconds

Question 26

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

Answer 26

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

Question 27

What is the blue microtube used for?

Answer 27

Platelet count tests

Question 28

What is the lavender microtube used for?

Answer 28

CBC or complete blood count and hematology tests

Question 29

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

Answer 29

Chemistry tests

Question 30

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

Answer 30

False, always use the non-dominant hand

Question 31

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

Answer 31

Sealing clay

Question 32

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

Answer 32

False, always take note of the positioning of each tube

Question 33

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

Answer 33

11,000-12,000 for about 5 minutes

Question 34

When should you open the centrifuge?

Answer 34

After it has come to a complete stop

Question 35

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

Answer 35

Place the tubes in a microhematocrit reader

Question 36

How do you align/position a hematocrit tube?

Answer 36

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

Question 37

How do you read a hematocrit tube?

Answer 37

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

Question 38

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

Answer 38

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

Question 39

What is BT?

Answer 39

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

Question 40

Why are BT tests not commonly used anymore?

Answer 40

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

Question 41

What method should you use for a BT test?

Answer 41

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

Question 42

What materials do you need for a BT test?

Answer 42

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

Question 43

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

Answer 43

veins, scars, hair, and bruises

Question 44

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

Answer 44

Clotting

Question 45

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

Answer 45

Ancillary blood glucose tests

Question 46

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

Answer 46

Bleeding Time

Question 47

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

Answer 47

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

Question 48

What is another name for the heel bone?

Answer 48

Calcaneus

Question 49

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

Answer 49

Capillary tubes.

Question 50

What are micropipets or large glass capillary tubes?

Answer 50

Caraway or Natelson pipets

Question 51

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

Answer 51

Microcollection tubes

Question 52

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

Answer 52

Osteochondritis

Question 53

Medical term for a bone infection

Answer 53

Osteomyelitis

Question 54

Medical term for formation of a blood clot within a vein

Answer 54

Vein thrombosis

Question 55

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

Answer 55

42 degrees Celsius or 107 degrees Fahrenheit