phlebotomy chapter 4 notes

What is included in routine phlebotomy equipment?

Evacuated tube holders, needles, syringes, winged collection sets, collection tubes, tourniquets, antiseptic solutions, gloves, gauze pads, slides, markers, transfer devices, sharps disposal containers, and alcohol-based hand gel.

What is the purpose of the Evacuated Tube System (ETS)?

To collect blood samples using a predetermined vacuum that fills evacuated tubes automatically, decreasing exposure risks and ensuring correct blood-to-additive ratios.

What is the standard gauge for most adult blood collection needles?

21-gauge needle.

Why is a 25-gauge needle avoided for venipuncture?

Its narrow diameter can cause hemolysis and lead to falsely elevated serum determinations.

What is the function of a needle holder in phlebotomy?

To securely hold double-pointed needles for collecting blood into evacuated tubes.

What does the Needlestick Prevention and Safety Act require?

Every needle must have a safety feature that blunts, shields, or retracts the needle after use.

What are blood collection tubes?

Specialized containers used to collect and transport blood samples, available in various sizes and may contain additives.

What happens if a blood collection tube loses its vacuum?

It may cause a failed collection due to factors like manufacturer error, expired tubes, or improper venipuncture techniques.

What role do additives play in blood collection tubes?

They serve as stabilizers, preservatives, or anticoagulants to prevent coagulation and ensure accurate test results.

What is the proper method for mixing tube additives?

Invert the tube an appropriate number of times without shaking to prevent hemolysis.

whats the length of winged collection needles?

0.5 to 0.75 inches

how does a phlebotomist select the appropriate tube based on the patient’s ?

patient’s age and veins

each tube is labeled with-

its additives,volume, and expiration date

why is the light-blue-topped tubes are drawn before anticoagulant-containing tubes ?

because carryover can falsely increase coagulation time.