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Partial Thromboplastin Time Blood Test, Activated

A PPT Test is useful in detecting deficiencies or inhibitors to the intrinsic (Factors VIII, IX, XI, and XII) and common (Factors II, V, X, and fibrinogen) pathway coagulation factors.


Test Code: 005207

Also Known As: APTT; PTT; Activated Partial Thromboplastin Time (aPTT)

Methodology: The aPTT reagent consisting of silica mixed with synthetic phospholipid is mixed with the patient plasma. The silica provides a negatively-charged particulate surface for the activation of the contact pathway of coagulation. Calcium chloride is then added to the sample/reagent mixture to initiate clot formation. The time to clot formation is measured photo-optically.

Preparation: No special preparation required.

Test Results: 2-3 days. May take longer based on weather, holiday or lab delays.

Sample Report

Test Code: 763

Also Known As: APTT; PTT; Activated Partial Thromboplastin Time (aPTT)

Methodology: Photo-optical Clot Detection

Preparation: No special preparation required.

Test Results: 2-3 days. May take longer based on weather, holiday or lab delays.

Description

A partial thromboplastin time (PTT) test will help determine your body's capability to form blood clots.  A blood clot forms following the successful and timely completion of a sequence of events known as the coagulation cascade, in which coagulation factors are activated one after the other. For the process to work effectively, an adequate quantity of each coagulation factor must be present, and each must function properly. 

Symptoms that might lead to one ordering this test are, but not limited to, the following:

  • easily bruised
  • painful or swollen joints
  • frequent or heavy nosebleeds
  • blood in the urine
  • heavy or prolonged menstrual periods

See also Walk-In Lab's Prothrombin Time (PT) w/INR and Partial Thromboplastin Time (PTT) Blood Test.

 

 

 

 

 

 

 

 

 

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