LAB MANUAL - CAPILLARY BLOOD COLLECTION Flashcards
(43 cards)
Implies puncturing the ________ layer of the skin to access the capillary beds that run through the subcutaneous layer of the skin.
dermal
Capillary Blood Collection: Preferred method of blood specimen collection for _____ and _______
newborns and infants
CLSI
Clinical Laboratory Standards Institute
for infants less than one year of age
Heel stick
children older than one-year
Fingerstick
CAPILLARY BLOOD MAY ALSO BE USED FOR ADULTS UNDER CERTAIN CIRCUMSTANCES INCLUDING:
Patients with fragile, superficial, or difficult to access veins.
Patients requiring only one blood test for which a capillary specimen is appropriate.
Point-of-care testing where only a few drops of blood are needed.
Patients where multiple unsuccessful venipunctures have already been performed, especially if the test(s) requested requires only a small volume of blood.
Patients with burns or scarring in venous blood collection sites.
Extremely obese patients
Patients requiring frequent blood tests.
Patients receiving IV therapy in both arms or hands
Patients at risk for serious complications associated with venipuncture, venous thrombosis, or deep venous puncture.
Patients whose veins are “reserved” for intravenous therapy or chemotherapy.
CAPILLARY BLOOD COLLECTION IS INAPPROPRIATE FOR:
Severely dehydrated patients
Patients with poor circulation
Coagulation studies requiring plasma specimens.
Tests that require large volumes of blood (such as Erythrocyte Sedimentation Rate and blood cultures).
THE FOLLOWING TESTS ARE COMMONLY PERFORMED USING CAPILLARY BLOOD:
Point-of-Care testing (POCT, i.e. blood glucose monitoring)
Complete blood count, hemoglobin, and hematocrit
Peripheral Blood Smear (manual slide for white blood cell differential)
Neonatal Blood Gases
Neonatal Bilirubin
Neonatal Screening (filter paper or bloodspot testing)
Electrolytes.
For the order of draw in Capillary Blood Collection, CLSI recommended to collect_________ first, as the blood becomes an increasingly more like venous blood if the collection is delayed.
blood gases
If collection of blood for a CBC is
delayed, there is an increased likelihood of erroneous cell counts due to ____________.
platelet clumping
To minimize effects of platelet clumping, the following order is recommended:
- Blood Gases
- EDTA tubes
- Other additive tubes
- Serum tubes
EQUIPMENT FOR CAPILLARY SPECIMEN COLLECTION
PUNCTURE DEVICES
INCISION DEVICES
LASER LANCETS
MICROHEMATOCRIT CONTAINERS
MICROHEMATOCRIT TUBES AND SEALANTS
Used to puncture the skin by inserting either a needle or blade vertically into the tissue.
PUNCTURE DEVICES
Preferably for sites that are repeatedly punctured.
PUNCTURE DEVICES
slice through capillary beds
INCISION DEVICES
Create less painful than puncture devices and require fewer repeat incisions and shorter collection times.
INCISION DEVICES
Recommended for infant heel sticks.
INCISION DEVICES
skin puncture should be:
_________, _________, ________ with a _________ to reduce the possibility of accidental needlestick injuries and reuse.
sterile, disposable, single-use device with a permanently retractable blade or needle
use a safety type of laser (in compliance with laser and medical device safety standards) that generates high energy when the laser comes in contact with the skin
Laser lancet
A small hole is created in a very short time (Less than 1/10000 second) with very little pain.
Laser lancets
Some are fitted with narrow plastic capillary tubes to facilitate specimen collection.
MICROHEMATOCRIT CONTAINERS
Have color-coded caps or stoppers that correspond to ETS blood collection tubes, and markings for minimum and maximum fill levels
measured in microliters.
MICROHEMATOCRIT CONTAINERS
Are narrow-bore plastic or plastic-clad glass capillary tubes that fill by capillary action.
MICROHEMATOCRIT TUBES
MICROHEMATOCRIT TUBES can hold up to ___ - ___ of blood
50 to 70 uL
