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HelpTest Code LAB325 Partial Thromboplastin Time (PTT)
Acceptable Collection Tube(s) or Specimen
Blue
Specimen Draw Volume
2.7 mL
Processing Instructions
Draw 2.7 ml in a Blue Top tube. Tube must be filled appropriately to the fill line to ensure accurate results. Centrifuge, aliquot and freeze.
Stability
Stability: Plasma: Frozen 3 months.
Performed Test Frequency
Everyday
CPT(s)
85730
Performing Location
MercyOne Des Moines Laboratory, Hematology
Methodology
Clotting
Rejection Criteria
Rejection criteria: Refrigerated plasma, underfilled blue top, unfrozen >4 hours.