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aPTT-FS (Factor Sensitive)

Justification

aPTT-FS utilizes a highly factor-sensitive aPTT reagent for the detection of factor deficiencies (VIII, IX, XI, XII) of the intrinsic system. With lower sensitivity to lupus anticoagulants and high sensitivity to heparin, this test provides a useful tool to characterize coagulopathies. Machaon Diagnostics offers three different activated Partial Thromboplastin Time tests (aPTT, aPTT-LA, and aPTT-FS), each with different clinical utility based on differences in sensitivity to the presence of factor deficiencies and lupus anticoagulants.

STAT: < 24 hours (7 days a week)

Clot-based

Draw Tube: Blue Top

Sample Type: Citrated Plasma

Specimen Requirements

Sample Type Volume Required Minimum Volume Stability
PREFERRED Citrated Plasma 1mL 0.5mL Frozen (-20C): 2 weeks
Frozen (-80C): 6 months
ALTERNATIVE - - - -
REJECTION CRITERIA Thawed in transit, refrozen or clotted sample
SPECIAL INSTRUCTIONS -

General Information

METHODOLOGY Clot-based
STAT TAT < 24 hours (7 days a week)
STAT TAT Performance > 90% of results released in 24 hours 7 days a week
ROUTINE TAT < 24 hours (M-F)
ALTERNATIVE NAMES Factor Sensitive Activated Partial Thromboplastin Time, PTT-FS
DESCRIPTION Coagulation screening assay using a factor sensitive aPTT reagent with soy-based phospholipids and ellagic acid activator.
LIMITATIONS -
NORMAL RANGE 21.6-30.2 seconds
ASSOCIATED TESTING -
REFERENCES -
SAMPLE REPORT Upon request
NEW YORK STATE APPROVED -

Test Codes

ORDER CODE P3351
CPT CODE 85730
LOINC CODE 14979-9