The Heparin tube is essential for blood collection in clinical settings, ensuring accurate testing without compromising blood composition or causing hemolysis. It enables fast plasma separation across various temperatures and maintains a balanced fibrinogen-fibrin ratio during inspection. Most plasma indices can be repeated within a short timeframe. Lithium heparin offers comparable benefits to sodium heparin and is compatible with capillary element tests without affecting sodium ions. Additionally, the option to add plasma separation gel enhances plasma quality, catering to a wide range of clinical laboratory requirements