Order Mnemonic:

APTT

Dept Name:

HEMATOLOGY

Collection Requirements:

Do not order for patient on heparin therapy.
Must be a full draw.
Mix thoroughly immediately after collection.

Transport:

Plasma, frozen.

Processing:

Mix tube thoroughly before centrifugation.
Centrifuge for 15 minutes at 3000 rpm.
Filter and separate plasma.

Stability After
Processing:

Whole blood:
Ambient: 2 hours
Refrigerated: 4 hours
Frozen: Unacceptable

Processed:
Ambient: 2 hours
Refrigerated: 4 hours
Frozen: 2 weeks

Minimum Testing
Volume:

1.0 mL

Unacceptable Conditions:

Hemolyzed, clotted, short draw, non-frozen and serum specimens. Frozen whole blood. Non-frozen plasma.

Reference Range:

By report

Methodology:

Turbidimetric Clot Detection.
ACL Top

CPT Codes:

85730

Performed:

Sun-Sat

Reported:

Varies

NCD/LCD ABN Required:

Yes