b

Question 1

What is the most common and efficient system and that preferred by the CLSI for collecting blood samples?

Answer 1

Evacuated tube system (ETS)

Question 2

It is a closed system in which the patient’s blood flows through a needle inserted into a vein and then directly into a collection tube without being exposed to the air or outside contaminants
* Three basic components:
1) A special blood-drawing needle
2) A tube holder
3) Various types of evacuated tubes

Answer 2

Evacuated tube system (ETS)

Question 3

Why are ETS needle called multisample needles?

Answer 3

It is because they allow multiple tubes of blood to be collected during a single venipuncture.

Question 4

What are threaded in the middle and have a beveled point on each end?

• [The threaded portion screws into a tube holder. The end of the needle that pierces the vein is longer and has a longer bevel. The shorter end penetrates the tube stopper during specimen collection. It is covered by a sleeve that retracts as the needle goes through the tube stopper so that blood can flow into the tube. When the tube is removed, the sleeve slides back over the needle to prevent leakage of blood.]

Answer 4

Multisample Needles