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

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Useful For

Monitoring heparin therapy (unfractionated heparin)

 

Screening for certain coagulation factor deficiencies

 

Detection of coagulation inhibitors such as lupus anticoagulant, specific factor inhibitors, and nonspecific inhibitors

Method Name

Coagulometric (Turbidimetric)


Specimen Required


Specimen Type: Platelet-poor plasma

Collection Container/Tube: Light-blue top (3.2% sodium citrate)

Submission Container/Tube: Plastic vial

Specimen Volume: 1 mL

Collection Instructions: Spin down, remove plasma and spin plasma again.

Additional Information: Double-centrifuged specimen is critical for accurate results as platelet contamination may cause spurious results.


Reporting Name

Activated Partial Thrombopl Time, P

Specimen Type

Plasma Na Cit

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Plasma Na Cit Frozen (preferred) 30 days
  Ambient  4 hours

Reject Due To

Hemolysis Mild OK; Gross reject
Lipemia Mild OK; Gross OK
Icterus Mild OK; Gross OK
Other NA

Reference Values

25-37 seconds

Day(s) and Time(s) Performed

Monday through Sunday; Continuously

Test Classification

This test has been cleared or approved by the U.S. Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information

85730

LOINC Code Information

Test ID Test Order Name Order LOINC Value
APTTP Activated Partial Thrombopl Time, P 14979-9

 

Result ID Test Result Name Result LOINC Value
APTTP Activated Partial Thrombopl Time, P 14979-9