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Test Code PLASMINOGN Plasminogen Activity, Plasma

Reporting Name

Plasminogen Activity, P

Useful For

Evaluating patients with ligneous conjunctivitis (strong association with homozygous plasminogen deficiency)

 

Evaluating fibrinolysis, in combination with other components of the fibrinolytic system (fibrinogen, tissue plasminogen-activator-inhibitor, and d-dimers)


Advisory Information


Coagulation testing is highly complex, often requiring the performance of multiple assays and correlation with clinical information. For that reason, we suggest ordering THRMP / Thrombophilia Profile.



Specimen Required


See Coagulation Studies in Special Instructions.

 

Specimen Type: Platelet-poor plasma

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

Submission Container/Tube:  Polypropylene vial

Specimen Volume: 1 mL

Collection Instructions:

1. Spin down, remove plasma, and spin plasma again.

2. Freeze specimen immediately at ≤-40° C, if possible.

Additional Information:

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

2. Each coagulation assay requested should have its own vial.


Specimen Type

Plasma Na Cit

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time
Plasma Na Cit Frozen 14 days

Day(s) and Time(s) Performed

Monday through Friday

Performing Laboratory

Mayo Medical Laboratories in Rochester

Method Name

Chromogenic Assay

Method Description

This assay is performed using the HemosIL Plasminogen Kit on the ACL TOP instrument. The method is an automated chromogenic assay in which an excess of streptokinase (SK) in the presence of fibrinogen is added to sample plasma containing plasminogen. A plasminogen-streptokinase complex is formed. The complex catalyzes the splitting of p-nitroaniline (pNA) from the substrate S-2403 pyroGlu-Phe-Lys-pNAHCl. Under these conditions the enzymatic activity of the complex is not inhibited by plasma inhibitors. The rate at which the pNA is released is measured kinetically at 405 nm and is directly proportional to the plasminogen level in the test specimen. The concentration of plasminogen is calculated from a standard curve prepared from reference plasma dilutions.(Package insert: HemosIL Plasminogen. Instrumentation Laboratory Company, Bedford, MA, Rev 8 02/2013)

Reference Values

75-140%

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

85420

LOINC Code Information

Test ID Test Order Name Order LOINC Value
PSGN Plasminogen Activity, P 28660-9

 

Result ID Test Result Name Result LOINC Value
PSGN Plasminogen Activity, P 28660-9

Reject Due To

Hemolysis

Mild OK; Gross reject

Lipemia

Mild OK; Gross reject

Icterus

Mild OK; Gross reject

Other

NA

 

Special Instructions