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medical disposable purple Edta tube

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1. The Tube Top (Purple/Lavender Color)

  1. Color Code: Purple or lavender. This is a universal standard for EDTA tubes, ensuring instant visual identification by phlebotomists and laboratory staff worldwide.
  2. Material: Plastic (typically PET) or glass.

2. The Anticoagulant: K₂EDTA or K₃EDTA

  1. Type: Dipotassium (K₂) or Tripotassium (K₃) Ethylenediaminetetraacetic Acid.
  2. Form: Spray-dried or liquid coating on the inner wall.
  3. Function: Chelates (binds) calcium ions in the blood, which is an essential factor in the coagulation cascade, thereby preventing clot formation.
  4. Standard Fill Volume: Tubes are designed for a specific blood draw (e.g., 2mL, 3mL, 5mL, 6mL). The concentration of EDTA is optimized for that volume. Under-filling can cause excess EDTA to distort red blood cells and affect results.

3. The Tube Interior (Vacuum)

  1. Contains a pre-measured vacuum that ensures automatic aspiration of the correct blood volume when the needle enters the vein, maintaining the critical blood-to-anticoagulant ratio.

4. Safety Features (Modern Tubes)

  1. Hemogard™ Closure: A plastic shield over the rubber stopper that reduces aerosol exposure when opening.
  2. BD Vacutainer® Eclipse™ Blood Collection Needle: Integrated safety needles that lock over the used needle after collection.

5. Labeling

  1. Includes essential information: manufacturer, volume, anticoagulant type (K₂EDTA or K₃EDTA), expiration date, and CE/FDA marks.


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medical disposable purple Edta tube
$0.07 $0.00
$0.07