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small-volume tube

Medical term Routine Blood Collections

Standard-size tube with a weaker vacuum that draws less blood; used for children and fragile veins to reduce vein collapse and blood loss.

Related terms

  • veinA vessel that carries blood back toward the heart under low pressure. Superficial arm veins are the usual…
  • rolling veinA vein that slides away from the needle; anchoring the skin taut below the site holds it in place.
  • 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…
  • sodium citrateAnticoagulant that binds calcium, used in light blue-top tubes for coagulation tests. Fill to the line to…
  • 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…

Study Routine Blood Collections