QUIZ : SEMINAR HEMOSTASIS ASAS PERINGKAT NEGERI SARAWAK 2025

Is it acceptable to transfer blood from one collection tube to another?

• Yes, if the first tube is overfilled

• Only allowed for senior phlebotomist

• No, it should never be done

• Yes, to mix samples better

Why is it important to follow the correct order of draw?

• To save time of phlebotomist and reduce tube wastage

• To cause contamination with EDTA/heparin

• To reduce needle sticks injury

• To minimize patient discomfort

• To avoid gel clot contamination induced analyzer malfunction

How many gentle end-over-end inversions should be performed to ensure adequate mixing for citrated tube?

• 1 to 2

• 10 to 15

• 3 to 4

• None

Why is it important to invert blood collection tubes containing anticoagulant after blood taking?

• To warm the sample

• To reduce hemolysis

• Check for clot

• To change the sample color

• To prevent clotting

What is the minimum acceptable fill for coagulation testing tubes according to current guidelines?

• 50% for PT, 70% for aPTT

• 90% for PT, 80% for aPTT

• 100% for both

• 90% for PT, 90% for aPTT

• 80% for PT, 90% for aPTT

What is a possible consequence of overfilling a coagulation tube?

• Accurate PT and APTT results

• High citrate concentration, enhancing clot formation

• Low citrate concentration, caused falsely reduced PT/APTT

• No significant impact on test results

What is the typical minimum factor level (in U/dL) required to generate a normal clotting test result in a mixing study?

• 10 U/dL

• 25 U/dL

• 50 U/dL

• 100 U/dL

What is the most probable cause of a false prolonged coagulation test result?

• Lipaemia and icteric plasma sample

• EDTA contamination

• Low platelet count

• Incorrect reagent temperature

What is the most common plasma ratio used in a mixing study?

• 2:1 patient plasma to normal pooled plasma

• 1:1 patient plasma to Owren buffer

• 1:1 patient plasma to normal pooled plasma

• 1:2 patient plasma to control plasma

What is the average concentration of clotting factors in normal plasma?

• 10 U/dL

• 50 U/dL

• 100 U/dL

• 200 U/dL