Purple Top Vacutainer Microtube (K2 EDTA)

Anticoagulant: K2 EDTA

• Prevents clotting by binding calcium ions (essential for coagulation).
• Preserves blood cell structure (RBCs, WBCs, platelets) for accurate analysis.
• Preferred EDTA type for hematology tests due to better cell preservation.

🧴 Microtube Design

• Small volume (microcollection) — ideal for:
  • Pediatrics (newborns, infants)
  • Patients with difficult venous access
• Used for capillary blood collection rather than standard venous draws

🎨 Color Coding

• Purple/Lavender cap = EDTA tube
• Standard lab color coding helps prevent sample mix-ups

🧪 Common Uses

These tubes are mainly used in hematology:

• Complete Blood Count (CBC)
• Full Blood Count (FBC)
• Blood grouping (ABO/Rh typing)
• Hemoglobin & hematocrit tests
• Blood cell morphology studies

👉 They are ideal when whole blood (not serum) is required.