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51 terms

Chapter 5 - Equipment

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Additive
Any material placed in a tube that maintains or facilitates the integrity and function of the specimen
Capillary action
Adhesive molecular forces between liquid and solid materials that draw liquid into a narrow-bore capillary tube
Diluent
Substance used to dilute a product
Fibrin degradation products (FDP)
Fragments of the fibrin/clot found in the bloodstream
Fibrinolysis
Process at the end of the clotting process that breaks down fibrin into small fragments, called fibrin degradation products, that lead to disintegration of the clot
Flea
Metal rod used for mixing the blood sample that fits inside a capillary tube
Hemostasis
Process of the formation of a blood clot when an injury occurs and then losing of that blood clot when the injury has been repaired
Palpate
To search for vein with a pressure-and-release touch
Reagent
Substance used to detect or measure another substance.
Thixotropic vasoconstriction
Any constriction of vessel(s) that limits blood flow.
Breathing the syringe
Pull back on the plunger to about halfway up the barrel and then push the plunger back
Bevel of the needle
The angle of the needle on the tip
Does a sharper bevel produce more or less pain
Less pain
Needle gauge 25
Inter muscular injections
Needle gauge 23
Butterfly or syringe collection
Needle gauge 22,21,20
Syringe or evacuated system collection
Needle gauge 16,18
iVs or blood donation
The use of a syringe larger than____to___is___recommended
10ml to 15ml not recommended
At what rate should blood be drawn to prevent vein collapse?
Pull plunger slowly and rest between pulls allowing vein to refill
Vacutainer system
Evacuated system
Manufactured since 1940s
Vacutainer/evacuated system needle configurations
1. Basic needle is straight, with no safety devices
2. Needle has safety device attached
pumping the hand
*should be avoided
*can change test results of some
*potassium is released into the bloodstream from the tissue and red blood cells.
Where is the tourniquet applied to draw blood?
3 to 4 inches above the puncture site
when should tourniquets be disposed
there are no osha standards but as a rule of thumb when it is soiled or it loses its elasticity
most commonly used tourniquet is made of
latex because it is more stretch and less costly
tourniquets
constrict the flow of blood in the arm and makes the veins more prominent
palpate
To examine by feeling and pressing with the palms of the hands and fingers.
The finger of which hand should be used dominant or nondominant hand?
same index finger of nondominant hand
how long can a tourniquet stay on an arm?
no more than 1 minute
hemoconcentration of blood
this is caused when a tourniquet is left on the arm too long
Equipment used to collect blood consists of 2 parts
1. a method of puncturing the finger or heel
2. a method to collect the sample
what type of lancet is recommended
spring-loaded puncture device
capillary action
Adhesive molecular force between liwuid and solid materials that draws into norrow-bore capillary tubes
microhematocrit cappilary tubes
...
blood gas testing
...
hematocrit
...
flea
small magnetic stirrer inside test tubes with heparin
Phlebotomist's tray should include at least the following:
1. Alcohol swabs
2. Gauze squares or cottonballs
3. Evacuated tube holders
4. Assorted evacuated tubes
5. Syringes
6. Various-size syringe and evacuated tube needles
7. Butterfly collection sets
8. Lancets
9. Microcollection equipment
10. Tourniquets
11. Sharps container
12. Marking pens
13. Disposable gloves
14. Ammonia capsule
15. Biohazard sharps container
10 mililiters (mL) is the same as
10 cubic centimeters
Which needle has the smallest bore?
25-gauge needle
A short draw with a sodium citrate tube will
...
Which anticoagulants prevent coagulation of the blood by removing calcium through the formation of insoluble calcium salts?
...
An anticoagulant is an additive placed in evacuated tubes in order to
...
A green-stoppered evacuated tube contains what kind of anticoagulant?
heparin
-sodium heparin
-lithium heparin
When serum is needed for testing, blood must be collected in which colored tubes?
...
Unsterile tubes may
...
The tourniquet should be applied how many inches above the proposed venipuncture site?
3 to 4 inches
Leaving the tourniquet on a patient's arm for an extended length of time before drawing blood may cause
hemoconcentration
gauge of needle is determined by
the diameter of the lumen or opening of the bevel end
what is a 25-gauge needle used for
inermuscular injections
A 25-gauge needle cannot be used for blood draw, why?
the red blood cells would be destroyed when the blood is pulled through the bore of the needle