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sodium citrate

Medical term Routine Blood Collections

Anticoagulant that binds calcium, used in light blue-top tubes for coagulation tests. Fill to the line to keep the 1:9 citrate-to-blood ratio.

Related terms

  • anticoagulantPrevents clotting: tube additives like EDTA, citrate and heparin, and blood thinners like warfarin, which…
  • coagulationClotting: the chain of reactions in which clotting factors turn fibrinogen into a mesh of fibrin that holds…
  • sclerosed veinA hardened, cordlike vein, often from damage or clotting; it does not spring back when pressed and is not…
  • serumThe liquid left after blood clots and is centrifuged; it lacks the clotting factors used up in the clot…
  • serum separator tubeGold or red-gray (tiger) top. Its clot activator speeds clotting; when the tube is spun, its gel moves to…
  • small-volume tubeStandard-size tube with a weaker vacuum that draws less blood; used for children and fragile veins to reduce…
  • sphygmomanometerA blood pressure cuff with a gauge. It can serve as a tourniquet when inflated to just below the patient's…
  • syncopeFainting: brief loss of consciousness when too little blood reaches the brain. If it starts during a draw…
  • syringeBarrel and plunger used with a needle or winged set, often for small or fragile veins; a 1 to 5 mL syringe…
  • systemic circulationBlood flow from the left ventricle through the arteries to the body's tissues and back through the veins to…

Study Routine Blood Collections