1
Q
- Used with both the ETS and the syringe method of obtaining blood specimens
- Come in various sizes and volumes ranging from 1.8 to 15 mL
- Tube selection is based on the age of the patient, the amount of blood needed for the test, and the size and condition of the patient’s vein.
A
Blood collection (evacuated) tubes
2
Q
- Artificially created by pulling air from the tube
- The amount of this (i.e., the amount of air removed and negative pressure created) is measured precisely by the manufacturer so that the tube will draw the exact volume of blood indicated on the label
A
Vacuum
3
Q
Most of these that do exist are used for clearing or discard purposes only
A
Nonadditive Tubes
4
Q
These are so smooth inside that platelet aggregation and adhesion are inhibited, resulting in delayed or incomplete clotting. Consequently, clot activators are added to these. This is not a problem with glass tubes, because glass has a rough surface.
A
Plastic tubes
5
Q
- Most ETS tubes contain some type of additive
- Additive
▪ Any substance placed within a tube other than the tube stopper
▪ Has one or more specific functions, such as preventing clotting or
preserving certain blood components
A
Additive Tubes
6
Q
- Any substance placed within a tube other than the tube stopper
- Has one or more specific functions, such as preventing clotting or preserving certain blood components
A
Additive
7
Q
Tube stoppers (tops or closures) are typically made of —?
A
Rubber
8
Q
Are tube stoppers color coded?
A
Yes
9
Q
What does the color stopper identifies?
A
- a type of additive placed in the tube by the manufacturer for a specific purpose
- for some tubes, it indicates a special property of the tube
10
Q
Manufacturers guarantee reliability of additives and tube vacuum until an expiration date printed on the label, provided the tubes are handled properly and stored between —- and ——-°C.
A
4; 25
