Order of Draw

To avoid cross-contamination, blood must be drawn and collected in tubes in a specific order. This is known as the Order of Draw.

  1. Blood Culture Tubes or Vials
  2. Coagulation Tubes (Blue-Top Tubes)
  3. Serum Tubes without Clot Activator or Gel (Red-Top tubes)
  4. Serum Tubes with Clot Activator or Gel (Gold or Tiger Top Tubes)
  5. Heparin Tubes (Green-Top Tubes)
  6. EDTA Tubes (Lavender-Top Tubes)
  7. Oxalate/Fluoride Tubes (Gray-Top Tubes)