Heparin Blood Collection Tubes with Lithium Heparin Additive 10 mL by BD Vacutainer 16mm x 100mm, 100/boxHeparin Blood Collection Tubes with Lithium Heparin are used primarily for plasma determinations in clinical chemistry. The lithium heparin acts as an anticoagulant, preventing blood from clotting and allowing the separation of plasma from cells. These tubes are commonly used for: Chemistry Panels: Assessing metabolic functions and organ health. Electrolyte Testing: Measuring levels of ions like sodium, potassium, and chloride. Arterial Blood Gases