specimen collection (evacuated tube system) Flashcards
two methods of evacuated tube system
Single and multiple draw
Method of using ETS but filling up 1 tube only
Single draw
Using ETS and filling up 2 or more tube
Multiple draw
EVACUATED TUBE SYSTEM MATERIALS
a. Multisample Needle
b. Tube holder/needle adapter
c. Evacuated Tubes
o Both ends are sharp
o The tube end has a rubber cover to prevent
leakage between tubes
- When the tube is inserted in the needle, the rubber will retract exposing the needle where blood will travel from one end of the needle to the other
- One end is connected to the vein and the other is connected to the tube
Multi-Sample Needle Set
o Help place and remove tubes
▪ Two types: Adult Tube Holder and
Pediatric Tube Holder (smaller)
Tube Holder/ Needle Adapter
o Sodalime, Borosilicate glass or plastic
o With different additives or anti-coagulant present
- has vacuum inside
- has expiration dates written on their body
- Has black lines or arrows called as INDICATOR LINE
Evacuated Tubes
that gives the idea until how
much blood is the tube be filled
INDICATOR LINE
- Preserve a specific blood constituent
- Aid in the separation of serum from cell
- Not all additives have the same function,
Tube Additives
Not all additives have the same function, they could be:
- Anticoagulants
- Anti-glycolytic
- Clot activators
- Thixotropic gel separators
o Interrupt the process of coagulation
o EDTA, Citrate, Heparin, Oxalates
Anticoagulants
o Prevents Glycolysis
o Sodium Fluoride
Anti-glycolytic
o Activates clotting factors for blood to clot
Clot activators
o Most of the time called as ‘SST’ or serum
separator tube
o It separates the serum from other blood
components
Thixotropic gel separators
8x (some 6-8, 8-10) inversion
EDTA and Heparin
