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syncope

Medical term Routine Blood Collections

Fainting: brief loss of consciousness when too little blood reaches the brain. If it starts during a draw, stop, remove the needle and keep the patient from falling.

Sources

Related terms

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  • small-volume tubeStandard-size tube with a weaker vacuum that draws less blood; used for children and fragile veins to reduce…
  • 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…
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  • thrombinClotting enzyme that turns fibrinogen into fibrin. Orange-top tubes use a thrombin-based clot activator to…

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