heparin

Medical term Phlebotomy

An anticoagulant; in green-top tubes it is used for plasma chemistry tests. It is also given as a blood-thinning drug.

Sources

Free practice questions that use heparin

Phlebotomy, question 3Which additive prevents clotting by inhibiting thrombin rather than by binding calcium?

anticoagulantA substance that prevents blood from clotting, such as heparin, EDTA or sodium citrate in tubes, or warfarin…
plasmaThe liquid part of blood, mostly water, that carries blood cells and dissolved substances.
glycolytic inhibitorA tube additive, sodium fluoride in gray-top tubes, that stops cells from using up glucose in the sample.
hematomaA collection of blood under the skin, causing swelling and a bruise; a common venipuncture complication.
hemolysisRupture of red blood cells, which releases their contents and can invalidate test results.
hemostasisThe body's process for stopping bleeding.
lancetA small, sharp device used to puncture the skin for a capillary blood sample.
lipemiaExcess fat (lipid) in a blood sample, which can cause erroneous test results.
median cubital veinThe superficial vein in the antecubital area linking the cephalic and basilic veins; a frequent venipuncture…
order of drawThe CLSI sequence for filling blood tubes so additives do not carry over: blood cultures, light blue…