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A Syringe allows more control over the amount of pressure exerted on a tinyand/or fragile vein during a phlebotomy
a. Syringes do not contain a vacuum but are filled by pulling back on
plunger, allowing blood to flow into the barrel of the syringe
b. The force exerted on the inside of the blood vessel may be
increased or decreased by pulling plunger faster or slower
c. Therefore, the amount of pressure exerted on the inside of the vein
may be controlled by the phlebotomist
d. Phlebotomist may control rate at which blood is withdrawn &
thereby prevent a patient's veins from collapsing during blood
specimen collection
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∙ 11y ago
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