Plebotomy Essentials Chapter # 7 Order of Draw

What is the proper blood-to-additive ratio for a light-tube collected for a coagulation.

• 4:1

• 8:1

• 3:1

• 9:1

Which needle gauge has the largest lumen?

• 18

• 20

• 21

• 22

The tests performed in the following department are typically collected in a tube with a light-blue stopper.

• Chemistry

• Coagulation

• Hematology

• Microbiology

A tube with a green stopper normally contains?

• EDTA

• citrate

• heparin

• oxalate

The purpose of an antiglycolytic agent is to

• enhance clotting

• inhibit microbes

• preserve glucose

• prevent clotting

The solution normally used to clean the site before routine venipuncture is?

• 70% isopropanol.

• benzalkonium chloride

• chlorhexidine gluconate

• povidone-iodine

When nitrile or vinyls strap tourniquets become soiled with blood, it is best to

• autoclave and reuse them.

• throw them away

• wash them in bleach

• wipe them with alcohol

What is the most important factor in choosing which gauge needle to use for venipuncture.

• Age and weight of the patient.

• Number of tubes to be drawn

• size and condition of the vein

• type of test being performed.

Which additive is usually present in a tube with a lavender top?

• Citrate

• EDTA

• Heparin

• Oxalate

Glass particles present in serum separator tubes

• deter coagulation

• enhance clotting

• inhibit glycolysis

• prevent hemolysis