Test Order
A physician orders a PT, CBC, and glucose testing. Which tube must be drawn first?
Light Blue
Which additive works by binding calcium to prevent clotting?
EDTA, Sodium Citrate
What is the most common cause of hemolysis during venipuncture?
Aggressive mixing of the additives
Which tube is most commonly used for CBC testing?
Lavender
What vein is usually the first choice for routine venipuncture?
Median cubital vein
Why are blood cultures collected before all other tubes?
To reduce the risk of specimen contamination
Which additive is found in Light Blue tubes and why is the blood-additive ratio critical?
Sodium Citrate; inaccurate ratios affect coagulation results
A light blue tube is only half-filled. What should the phlebotomist do?
Recollect the specimen
Which tube is commonly used for PT and INR?
Light Blue
How many patient identifiers are required before specimen collection?
2 ( FUll name and date of birth)
What type of error occurs when EDTA contaminates a chemistry specimen?
Additive carryover
Which additive is responsible for preserving glucose levels after collection?
Sodium Fluoride
A patient pumps their fist repeatedly during collection. Which test nay be falsely elevated?
Potassium
Which tube is commonly used for glucose tolerance testing?
Gray
When should a tube be labeled?
Immediately after collection in the patient's presence
A phlebotomist accidentally draws a lavender tube before a green tube. Which electrolyte result may be falsely elevated?
Potassium
Which tube contains lithium or sodium heparin?
Green
Why should a tourniquet not remain on for longer than a minute?
It may cause Hemoconcentration
Which department most commonly receives specimens specimens collected in Green tubes?
Chemistry
What is the maximum acceptable tourniquet application time?
One minute or less
A Patient requires blood culture, PT, CMP, CBC, and glucose testing. Name every tube in order.
Blood culture, Light blue, Gold/Red, Green, Lavender, and Gray
A specimen is collected in a tube containing EDTA. Would serum or plasma be contained?
Plasma
A chemistry specimen arrives with visible hemolysis. What would happen?
The specimen would be rejected and ordered for recollection
Which tube contains a clot activator and gel separator?
Gold (SST)
A patient fells dizzy during a blood draw. What is the phlebotomist's first action?
Remove the tourniquet and needle, then assist the patient and support their head if needed