Heparin blood collection tubes

CD RICH Heparin Tubes 

The interior of the tube wall is coated with lithium heparin or sodium heparin. The anticoagulant heparin activates antithrombins which block the coagulation cascade and produce a whole blood / plasma sample instead of clotted blood plus serum.

Plasma Tubes with Lithium Heparin and Gel contain a barrier gel in the tube. The specific gravity of this material lies between the blood cells and plasma. During centrifugation the gel barrier moves upward, where it forms a stable barrier separating the plasma from cells. Plasma may be aspirated directly from the collection tube, which eliminates the need for transfer to another container.