The Coagulation Laboratory offers expert interpretations of coagulation profiles and consultations in the diagnosis and management of patients with bleeding and thrombotic disorders. An extensive battery of tests is offered using advanced and progressive technologies. Consultation Services are offered for patients whose blood has been tested in this laboratory.

Coagulation tests are extremely sensitive to methods of collection and preservation. It is very important that specimen collection and processing instructions are followed closely to insure accurate test results. Please refer to the Laboratory Users Guide for our online searchable test database specimen collection instructions and other test-related information. Please contact the Coagulation Laboratory prior to specimen collection for additional testing information not covered in the Laboratory Users Guide.

Coagulation Test Menu

Antithrombin III activity
Plasminogen activity
Protein C antigen
Protein C functional activity
Protein S total and free activity
Factor II, V, VII, VIII, IX, X, XI, XII activity
Factor VIII related protein
Factor II mutation
Factor V Leiden mutation
Ristocetin cofactor
Thrombin Time
Prothrombin Time (PT)/International Normalized Ratio
PT inhibitor screen/PT mixing study
Activated Partail Thromboplastin Time (PTT)
PTT inhibitor screen/PTT mixing study
Dilute Russel viper venom test
Lupis anticoagulant
Platelet function/aggregation (COL, EPI, AA. ADP, RISTO)
Heparin induced thrombocytopenia, qualitatiive (HIT)

Updates and changes to laboratory tests and/or laboratory practices may be viewed in our archived Lab Alerts.


Vladimir Vidanovic, MD
Phone: 312-996-6727

Contact Information

Hours of operation: Monday through Friday, 8:00 am to 5:00 pm
Phone:                         312-996-4440
Location:                     Pathology Laboratories
2nd Floor, Clinical Sciences Building North
840 South Wood Street (MC 750)
Chicago, IL 60612