• Home
  • MDLB 1321
    ORDER OF DRAW

  • Culture Bottle
  • SPS
  • Light Blue
  • PLAIN
  • SST
  • PST
  • Heparin
  • EDTA
  • Grey

PLASMA SEPARATOR TUBE (PST)

SPECIMEN

CENTRIFUGE FOR PLASMA

DEPARTMENT

CHEMISTRY

COMMON TESTS

STAT CHEMISTRY TESTS
SOME SPECIFIC TESTS REQUIRE PLASMA.
EXAMPLES: AMMONIA, USUALLY ELECTROLYTES.

REASON FOR ORDER

Can affect serum specimens, so collect after serum.
Affects coagulation tests.

HOW IT WORKS

Lithium Heparin.
Heparin inhibits thrombin.
Gel separator forms a physical barrier between cells and plasma to stop metabolizing substances such as glucose.

Mixing

MIXING

Requires immediate mixing.
5–10 gentle inversions.

SPECIAL CONSIDERATIONS

Used for STAT tests.
No clotting time required.