30 Questions
What type of patients would benefit from using the Open System/ Syringe System?
Patients with small or difficult veins
What is the purpose of the plastic extensions ('wings') on the Winged Infusion Set (Butterfly)?
To allow for easier manipulation for shallow angle of needle insertion
What is the primary advantage of using a Combination System for blood collection?
It combines the blood collection tube and collection apparatus into a single unit
What is the purpose of a clot activator in a blood collection tube?
To accelerate the clotting of the blood
What type of sample is produced when a blood collection tube contains an anticoagulant?
Plasma sample
What is the purpose of safety devices in blood collection systems?
To prevent accidental needlesticks
What is the primary purpose of following the order of draw in phlebotomy?
To prevent unnecessary carry-over or cross-contamination of additives
Which tube should be drawn first if a blood culture is ordered?
Blood culture bottle or tube (yellow or yellow-black top)
What is the purpose of drawing a non-additive tube first in some situations?
To prevent contamination by tissue fluids or thromboplastins
What is contained in an SST tube?
A gel separator and clot activator
Which of the following tubes has a lavender top?
EDTA
What is the correct order of draw for additive tubes?
SST, Sodium heparin, PST, EDTA, ACDA or ACDB, Oxalate/fluoride
What is the primary purpose of categorizing collection tubes according to the blood test that will be performed?
To prevent errors in mix-ups
What type of device is used to draw blood from a skin puncture, such as on the heels or fingers?
Microtainer
What is the purpose of a vacuum or negative pressure in a closed system of blood extraction?
To allow for a measured amount of blood to flow easily
What is indicated by a blue tip on a microcapillary tube?
The tube is plain or has no additive
When is it appropriate to use microcollection tubes?
When drawing blood from a patient with difficult veins
What type of safety feature is commonly used to prevent needlestick injuries?
All of the above
What is the additive in a Purple/Lavender color coded tube?
EDTA
Which of the following tests is NOT typically performed using a Gold (Serum Separator tube)?
Blood Typing (Rh Factor & ABO Screening)
What is the Blood:Anticoagulant ratio in a Light Blue tube?
9:1
Which additive is used in a Red tube?
Clot Activator
What is the primary use of a Dark Green tube?
Blood Coagulation tests
Why is the order of draw important when collecting multiple blood samples?
To avoid inserting needles every time a blood sample is needed for a different test
What is the effect of EDTA on the laboratory determination of calcium ions?
It chelates calcium, decreasing the concentration of calcium in the sample
What is the significance of precision in laboratory results?
It refers to the consistency of the results
Why are most reagents more compatible with serum than plasma?
Because the optimum reaction of the reagent with the substance in the blood is important for reliable results
What is the significance of reliability in laboratory results?
It means the results can be depended on
According to research, what is true about serum and plasma in terms of stability?
Serum is more stable than plasma for certain substances, such as creatinine and potassium
What is the role of laboratory results in the diagnosis of a patient?
They are used, along with the patient's history and other diagnostic results, to make a conclusive diagnosis
Test your knowledge on safety features, equipment, and collection tubes used in venipuncture. Learn about resheathing, blunting, and retraction devices, as well as evacuated tube systems and syringe components.
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