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Test Code PTT Activated Partial Thromboplastin Time (APTT), Plasma

Methodology

Mechanical Clot Detection

Useful as a screening procedure for deficiencies in coagulation factors of the intrinsic coagulation pathway; to screen patients with a bleeding tendency; for evaluating the effect of therapy in precoagulant disorders; as a basis for several specific coagulation factor assay procedures. 

Specimen Requirements

Specimen must arrive within 8 hours of draw.

 

Container/Tube:

     Light blue-top (3.2% sodium citrate) tube

     Clotted blood or an insufficient specimen is not acceptable.

Specimen Volume: Full tube (90%) of plasma

Collection Instructions: Do not centrifuge.

Note:

1. Draw a discard tube prior to light blue-top (3.2% sodium citrate) tube.

2. Tube should remain stoppered.

3. IF the sample is collected to monitor patient on Heparin Therapy, stability time s are shortened.   

    Specimen MUST be received in lab within 1 hour of collection.

Day(s) Test Set Up

Monday through Sunday

Reference Values

Reference range may change annually. Please refer to report for appropriate range.

 

Critical value (automatic call-back): ≥100.0 seconds

Test Classification and CPT Coding

85730

Performing Laboratory

Beebe Healthcare Laboratory

Performing Location

Margaret H. Rollins Laboratory
South Coastal Campus Laboratory 
Specialty Surgical Hospital Laboratory

Specimen Transport Temperature

Refrigerate ≤8 hours