Diagnostic Test Directory

Coagulation Laboratory

Partial Thromboplastin Time (PTT)

  • Synonyms: PTT
  • LIS Mnemonic: PTT

    Collect

    Blue (Sodium citrate)

    Volume Required

    Completely filled tube

    Minimum Required

    N/A

    Transport

    Room temperature

    Stability

    Specimen must be received within 4 hours of collection.

    Unacceptable conditions

    Specimens that are inadequately filled; hemolyzed/clotted specimens.

Reported

Stat - 45 Min., Routine - 90 Min.

Reflex Testing

Inhibitor Screen (INH) if MD requested.

CPT

85730, inhibitor screen = 85335

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