UHS and UTHSCSA
Department of Pathology


COLLECTION TUBES FOR PHLEBOTOMY

Purple Top

ADDITIVE

EDTA

USES

Hematology (CBC) and Blood Bank (Crossmatch); requires full draw - invert 8-10 times to prevent clotting and platelet clumping

Gold Top

ADDITIVE

None: clot activator

MODE OF ACTION

Serum separator tube (SST) contains a gel at the bottom to separate blood from serum on centrifugation

USES

Chemistries, Immunology and Serology

Red Top

ADDITIVE

None: clot activator

USES

Chemistries, Immunology and Serology,

Dark Green Top

ADDITIVE

Lithium heparin

MODE OF ACTION

Inactivates thrombin and thromboplastin

USES

For lithium level, & ammonia level,

Light Green Top

ADDITIVE

Plasma Separating Tube (PST) with Lithium heparin

USES

Chemistries

Light Blue Top

ADDITIVE

Sodium citrate

USES

Coagulation tests (protime and prothrombin time), full draw required

Light Gray Top

ADDITIVE

Sodium fluoride and potassium oxalate

USES

For lithium level, use sodium heparin
Glucoses, requires full draw
(may cause hemolysis if short draw)

http://www-medlib.med.utah.edu/WebPath/TUTORIAL/PHLEB/PHLEB.html


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Last updated on 31 October, 2004 by John D. Olson, M.D., Ph.D.