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Explain the purpose of a tourniquet:
a tourniquet prevents venous flew ppi of the arm
what does the gauge of a needle indicate
indicates the diameter off the needles lumen
describe the consequences of using a needle with a large gauge number
collection is slower and blood cells may be hemolyzed or destroyed as they pass through narrower opening
Explain the purpose of the sleeve one the multisample needle
keeps the needle keeps the needle from becoming contaminated or injuring you or the patient.
it jeeps blood from leaking onto or into adapter or tube holder
advantages and disadvantages of syringe method opposed to evacuated system
an advantage of the syringe method is that blood appears in the hub when the vein has been entered. A disadvantage of the Syringe method is that there is the potential for needlestick when depositing blood into the collection tube.
blood tubes are evacuated. explain what this means
when blood tubes are evacuated, a vacuum is created within the tube so that the measured amount off blood flows in easy.
why must unused blood tubes bre discarded when they expire
out of date tubes may have decreased volume, preventing a proper fill, or they may have additives that degrade over time
define sps and explain what it is used for
sodium polyanetholesulfonate, additive that prevents blood from clotting
if the collection tube contains an anticoagulant, what must you do immediately after collection
gently invert the tube, mix
purpose of thixotropic gel in a collection tube
forms barrier between blood cells and serum or plasma.
cellular reaction used to harvest energy from glucose
name 3 types of blood specimens
Red top tube
Light Blue Tube
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