This is an online resource for blood and other clinical laboratory collection and handling tips and techniques.

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)