Topic 1 - Capillary puncture and equipments Flashcards
sterile, disposable, sharp-pointed or bladed
instrument that either punctures or makes an
incision in the skin to obtain capillary blood
specimens for testing
LANCET/INCISION DEVICES
also called microtubes, are special small plastic
tubes used to collect the tiny amounts of blood
obtained from capillary punctures.
MICROCOLLECTION CONTAINERS/MICROTUBES
They are often
referred to as “bullets” because of their size and
shape. Some come fitted with narrow plastic
capillary tubes
MICROCOLLECTION CONTAINERS/MICROTUBES
Types of finger puncture lancets
BD Microtainer
Tenderlett
Capiject
ACCU-CHEK
Types of heel puncture lancets
QuikHeel
Tenderfoot
are disposable, narrow-bore plastic that fill by capillary action and typically hold 50
to 75 μL of blood.
MICROHEMATOCRIT TUBES
Examples of microcollection container
Microtainer
MiniCollect
Capiject
Samplette
BD Microtainer
They are used primarily for manual hematocrit (Hct)
MICROHEMATOCRIT TUBES
also called packed cell volume (PCV), determinations.
Hematocrit
Heparin tubes
typically have a ____ on one end
Red or green band; nonadditive tubes have a blue band
Come in small trays are used to seal one end of microhematocrit tubes.
Sealants
(plastic, clay, wax-type)
Capillary puncture can be an appropriate choice for older children and adults under the following circumstances:
- 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.
Capillary puncture is the preferred method of obtaining blood from infants and very
young children for the following reasons.
- 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.
TESTS THAT CANNOT BE COLLECTED BY
CAPILLARY PUNCTURE
ESR Methods
Coagulation studies
Blood Cultures
Order of Draw for Capillary Specimens (Tube, additive, mix)
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)