Order of draw

Front

What is the order of draw in phlebotomy?

Back

The order of draw refers to the sequence in which blood collection tubes should be filled to avoid contamination and ensure accurate test results.

Front

What color tube is used for coagulation tests?

Back

Blue top tube is used for coagulation tests, as it contains sodium citrate which helps in preserving the sample.

Front

What is the purpose of using a tourniquet during venipuncture?

Back

A tourniquet is used to temporarily restrict blood flow, making veins more prominent and easier to access.

Front

What additive is found in the lavender top tube?

Back

The lavender top tube contains EDTA, an anticoagulant that binds calcium ions to prevent blood clotting.

Front

What is the function of sodium citrate in blood collection?

Back

Sodium citrate acts as an anticoagulant by binding calcium ions, which are necessary for blood clotting.

Front

Which tube is filled last in the order of draw?

Back

The lavender top tube is filled last in the recommended order of draw.

Front

What tests are typically performed using the red top tube?

Back

The red top tube is typically used for serum tests, including chemistry and serology tests.

Front

What is the significance of the green top tube in blood collection?

Back

The green top tube contains heparin, which is used for tests requiring plasma.

Front

What does the term 'anticoagulant' mean?

Back

An anticoagulant is a substance that prevents blood from clotting.

Front

Why is it important to follow the order of draw?

Back

Following the order of draw is crucial to prevent cross-contamination of additives between tubes, which can lead to inaccurate test results.