MEDCA Phlebotomy Exam Prep CHAPTER 4 Questions and Answers;(perfect guide for your final)

Why is it important to fill tubes with anticoagulants to the correct levels? - to provide an accurate blood- additive ratio What is the preferred anticoagulant in clinical chemistry? - heparin What is the general anticoagulant used to study glucose levels? - sodium fluoride Order Of Draw - Yellow Light Blue Gold Red Orange Green Purple White Grey Yellow Top - Blood Cultures (SPS) (sodium polyanethold sulfonate) mix by inverting 8-10 times Additive- ACD (acid-citrate- dextrose) Mode of Action- complement inactivationUses- paternity testing, DNA studies, HLA tissue testing Light Blue Top - Citrate Mix by inverting 3-4 times Additive- Sodium Citrate Mode of Action- forms calcium salts to remove calcium Uses- coagulation tests, full draw required Dark Blue Top - Additive- Sodium EDTA