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Catalog ID APTT Activated Partial Thomboplastin Time

CPOE Test Name

APTT; PTT

Synonyms

aPTT, PTT

Specimen Type

Plasma

Specimen Requirements

Light Blue Top (Sodium Citrate) tube; 2.7 mL blood

Storage and Transport

Room temperature. Transport to the lab immediately.

Special Instructions

Always allow blue top/citrate tubes to fill completely.

Causes for Rejection

Tube improperly filled especially underfilling;

Specimen clotted;

Hemolysis

Reference Range

28.0 – 35.7 sec (May vary with lot number changes) Therapeutic range 58.0 – 96.0 seconds.

Critical Values

> 100 seconds

Turn Around Time

1 hour

Performing Lab

Core Laboratory AD 3301 721-2120

CPT/HCPCS Code

85730

CPT / HCPCS Code

85730