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when a patient has never blood drawn

Syringe allows more control over the amount of pressure exerted on a tiny

and/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d. Phlebotomist may control rate at which blood is withdrawn &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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When is a evacuated tube method preferred over the syringe method?

when a patient has never blood drawnSyringe allows more control over the amount of pressure exerted on a tinyand/or fragile vein during a phlebotomya. Syringes do not contain a vacuum but are filled by pulling back onplunger, allowing blood to flow into the barrel of the syringeb. The force exerted on the inside of the blood vessel may beincreased or decreased by pulling plunger faster or slowerc. Therefore, the amount of pressure exerted on the inside of the veinmay be controlled by the phlebotomistd. Phlebotomist may control rate at which blood is withdrawn &thereby prevent a patient's veins from collapsing during bloodspecimen collection


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