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Activated Partial Thromboplastin Time (APTT)

Important Note

Test must be in lab within 4 hours of collection.

Additional Codes

LAB325

Performing Laboratory

MBMC Main Laboratory

Methodology

Absrobance measurement, Clot signature formation

Literature References:

Package insert: SynthASil determination of activated partial thromboplastin time ACL TOP Instrumentation Laboratory, October 2012.

Specimen Requirements

Specimen must arrive and be tested within 4 hours of collection.
 
Specimen Type: Plasma

Container/Tube: 2.7-mL, light-blue top (sodium citrate)
Specimen Volume: Full tube

Specimen Minimum Volume: Fill to frosted minimal fill line on the tube.   

               Pediatric 1.0 mL in special pediatrics collection tube- 3.2% sodium citrate. The tube has no vacuum.
Collection Instructions: It is imperative that the tube be completely filled to maintain the proper ratio of blood to anticoagulant.

Specimen Transport Temperature

Ambient/Refrigerate NO/Frozen NO

Day(s) Test Set Up

Monday through Sunday
Turnaround Time:
STAT: 1 hour after receipt in laboratory
Routine: within 4 hours

Reference Values

0- 1 yr:  25-45 sec

1-10 yr:  25-40 sec

10 yr and older:  26-38 sec

Critical:  >150 seconds

 

Test Classification and CPT Coding

 

Test Classification:This test has been cleared or approved by the U.S. Food and Drug Administration and is used per manufacturer’s instructions.
CPT Code:

 

85730

Stability

4 hours Ambiant temperature