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week 3

medical assistant

QuestionAnswer
When is venipuncture used? When a large amount of blood is needed for testing.
Common venipuncture sites? Median cubital vein, cephalic vein, and basilic vein.
Complications of venipuncture? Hematoma, infection, nerve injury, or fainting.
What to do if blood doesn’t flow into the tube? Adjust needle slightly or replace the needle.
What is arterial puncture? Blood collection from an artery for blood gas analysis.
How is arterial puncture different from venipuncture? It collects blood from arteries instead of veins.
Common arterial puncture sites? Radial, brachial, or femoral arteries.
What test is done before arterial puncture? Allen’s test to check collateral circulation.
Purpose of gloves in phlebotomy? Prevent contamination and protect both patient and technician.
Purpose of tourniquet? Restrict venous blood flow to make veins more visible.
Function of evacuated tube system? Allows blood to be drawn directly into tubes under vacuum.
What do needle gauges indicate? The diameter—larger gauge number means smaller needle.
Color tube for coagulation tests? Light blue (sodium citrate).
Color tube for chemistry tests? Red or gold (clot activator or gel separator).
Created by: lexidoll
 

 



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