BD Vacutainer® PPT™ is a closed system allowing separation and storage of undiluted EDTA plasma in the primary blood collection tube. It is intended for the purposes of molecular diagnostic testing. PPT™ is an evacuated, sterile blood collection tube that contains an inert gel and spray-dried K₂EDTA anticoagulant for achieving plasma separation. When the sample-filled tube is subjected to centrifugation, the gel migrates and forms a physical barrier between the plasma and most of the cellular elements. Since the tube uses spray-dried K₂EDTA as opposed to liquid additives, the plasma obtained is undiluted.