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evacuated tube

Medical term Routine Blood Collections

A sealed tube with a preset vacuum that draws a set blood volume when its stopper is pierced by the back of a multisample needle.

Related terms

  • multisample needleDouble-ended needle for the evacuated tube system: one end enters the vein, the other pierces each tube…
  • dyspneaDifficult or labored breathing (shortness of breath). A patient who becomes short of breath during…
  • EDTAEthylenediaminetetraacetic acid: binds calcium to keep blood unclotted; the lavender-top additive for…
  • erythemaRedness of the skin from increased blood flow. Unlike petechiae or a bruise, it fades (blanches) when pressed.
  • erythrocyteRed blood cell: a disk-shaped cell without a nucleus that carries oxygen bound to hemoglobin.
  • evacuated tube systemClosed system of a multisample safety needle, a tube holder and vacuum tubes. Needle and holder go into the…
  • fibrinProtein threads formed from fibrinogen during clotting that bind platelets and blood cells into a clot.
  • fibrinogenA clotting protein in plasma that is converted into fibrin; plasma contains it, serum does not.
  • formed elementsThe solid part of blood: red cells, white cells and platelets (cell fragments), suspended in the liquid…

Study Routine Blood Collections