PTT

Test Code: TD_1430

CPT Code(s): 85730

$12

Test Details

Alternative Name(s)

APTT
Partial thromboplastin time

Test Includes

PTT

Methodology

Automated electromechanical clot detection

Rejection Criteria

Hemolysis
Clotted samples samples submitted in tube that is not completely filled
Samples submitted in inappropriate anticoagulant
Samples submitted in expired tube

Reference Range(s)

25.2-40.0 Seconds

Specimen Requirements

Preferred Specimen

Filled Citrate Tube

Minimum Volume

Completely filled citrate tube

Sample Stability

Plasma: 1 week frozen

Transport Temperature

Critical frozen (CFZ) for plasma

Collection Instructions

2 mL citrate (light blue top) plasma. Centrifuge sample and
separate plasma from cells immediately. Transfer plasma to
a plastic transport tube. Clearly label tube as citrate
plasma. Freeze. Critical Frozen (CFZ). When multiple
tests are ordered, submit separate tube for this test.
this assay is not intended for assessment of therapeutic
heparin anticoagulation.

Alternative Specimen

None

PTT

$12