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Test Code PTTA Activated Partial Thromboplastin Time

Additional Codes

N/A

Alias

APTT

Collection Method

Venous Collection

Container

Blue sodium citrate tube

Instructions/Special Handling

None

Preferred Specimen

Blue sodium citrate tube

Acceptable Specimes

Blue sodium citrate tube

Units

Seconds

Reference Ranges

25.1 - 36.5 seconds

Critical Values

>140 seconds

 

Reasons for Rejection

Hemolysis N/A
Icterus N/A
Lipemia N/A
Other QNS, Contaminated, Improperly labeled, Improper specimen type, Clotted, Insufficiently or over filled tube

 

Specimen Stability

Ambient (15-25°C) 4 hours
Refrigerated (2-8°C) N/A
Frozen (-20°C) 2 weeks (-20°C) or 3 months (-70°C)

 

Performing Site

Boone Health Laboratory

Performance Information

Days/Times Performed Daily 24/7
Expected Turn around Time Same day
Methodology/Method Description ACL TOP - Absorbance

CPT Code(s)

85730

CMS National Coverage Policy - PTT

Panel Components

N/A