Vacuum Blood Collection Tubes Purple

Purple top vacutainers (also known as lavender top tubes) are specialized, vacuum-sealed blood collection tubes primarily used for hematology testing and whole blood analysis

• How it works: EDTA is a powerful chelating agent. It works by binding to calcium ions (Ca²⁺) in the blood sample. Because calcium is a mandatory cofactor in the coagulation cascade, removing it completely prevents the blood from clotting, leaving it in a liquid state.
  Cell Preservation: EDTA is the preferred choice for cellular analysis because it excels at maintaining cell morphology (the shape and structure of red blood cells, white blood cells, and platelets) without causing cells to swell or shrink.