Topic 1 - Capillary puncture and equipments

Question 1

sterile, disposable, sharp-pointed or bladed
instrument that either punctures or makes an
incision in the skin to obtain capillary blood
specimens for testing

Answer 1

LANCET/INCISION DEVICES

Question 2

also called microtubes, are special small plastic
tubes used to collect the tiny amounts of blood
obtained from capillary punctures.

Answer 2

MICROCOLLECTION CONTAINERS/MICROTUBES

Question 3

They are often
referred to as “bullets” because of their size and
shape. Some come fitted with narrow plastic
capillary tubes

Answer 3

MICROCOLLECTION CONTAINERS/MICROTUBES

Question 4

Types of finger puncture lancets

Answer 4

BD Microtainer
Tenderlett
Capiject
ACCU-CHEK

Question 5

Types of heel puncture lancets

Answer 5

QuikHeel
Tenderfoot

Question 6

are disposable, narrow-bore plastic that fill by capillary action and typically hold 50
to 75 μL of blood.

Answer 6

MICROHEMATOCRIT TUBES

Question 7

Examples of microcollection container

Answer 7

Microtainer
MiniCollect
Capiject
Samplette
BD Microtainer

Question 8

They are used primarily for manual hematocrit (Hct)

Answer 8

MICROHEMATOCRIT TUBES

Question 9

also called packed cell volume (PCV), determinations.

Answer 9

Hematocrit

Question 10

Heparin tubes
typically have a ____ on one end

Answer 10

Red or green band; nonadditive tubes have a blue band

Question 11

Come in small trays are used to seal one end of microhematocrit tubes.

Answer 11

Sealants
(plastic, clay, wax-type)

Question 12

Capillary puncture can be an appropriate choice for older children and adults under the following circumstances:

Answer 12

• procedures such as chemotherapy.
• There are no accessible veins
• Several unsuccessful
  venipunctures have been performed and the requested test can be collected by capillary puncture.
• The patient has thromboticorclot-forming tendencies.
• The patient is apprehensive or has an intense fear of needles.
• To obtain blood for POCT procedures such as glucose monitoring.

Question 13

Capillary puncture is the preferred method of obtaining blood from infants and very
young children for the following reasons.

Answer 13

• Infants have a small blood volume.
• Large quantities removed rapidly can cause cardiac arrest.
• Difficult and may damage veins and surrounding tissues.
• Puncturing deep veins can result in hemorrhage, venous thrombosis, infection, and
  gangrene.
• An infant or child can be injured by the restraining method used while performing a
  venipuncture.
• capillary blood is preferred for some tests, such as newborn screening tests.

Question 14

TESTS THAT CANNOT BE COLLECTED BY
CAPILLARY PUNCTURE

Answer 14

ESR Methods
Coagulation studies
Blood Cultures

Question 15

Order of Draw for Capillary Specimens (Tube, additive, mix)

Answer 15

Blood Gas (Cap ends rotate between palms to mix)

EDTA (10)

Lithium Heparin (10)

Lithium Heparin with gel seperator (10)

Sodium Flouride/Potassium Oxalate (10)

Serum - Clot Activator (5)

Serum - No additive (0)

Newborn Blood Spot Card (Recommended to be collected seperately)

Question 16

In selecting puncture site:

Answer 16

must be warm, pink or normal color and free from scars, cuts, bruises, or rashes

It should not be CYANOTIC, EDEMATOUS, INFECTED, OR BE A RECENT
PREVIOUS PUNCTURE SITE.

Question 17

In infants, puncture of the bone can cause:

Answer 17

OSTEOMYELITIS and OSTEOCHONDRITIS