Learning Objective: At the end of this module, you will learn about the order of draw in phlebotomy and relate it with the importance of order of draw in blood specimen collection.
After that crash course on test tubes, let's take some time to appreciate the importance of tube vacuums and the need for discard tubes during blood draws.
Although these may seem unimportant, it is crucial to understand that delay in blood sample processing could occur once these steps are overlooked. Why is it so? Let's find out together!
Why, you may ask? Let Phlebotomist Mark explain it to you with the help of these flashcards he prepared to make it easier to understand!
Card 1
Fills blood automatically due to negative pressure inside the tubes.
Answer 1
Card 2
The amount of air evacuated from the tube predetermines how much blood will fill the tube. Capacity of blood will reduce if vacuum is exhausted.
Answer 2
Card 3
From opening the tube and dropping the tube accidentally.
Answer 3
Card 4
Advancing tube too far onto the needle holder.
Answer 4
Card 5
Pulling the needle bevel partially out of the skin during venipuncture.
Answer 5
Card 6
Always use a brand new set of tubes and avoid using expired tubes.
