Coagulation Panel

Prothrombin Time (PT) is a blood test value that measures how long a sample takes to clot after specific reagents are added. PT is used on a blood test and on a lab report to describe clotting speed in the coagulation system. It is often reviewed with other coagulation markers to give a broader picture of how the blood sample behaves in the lab.

International Normalized Ratio (INR) is a standardized lab value used to report how long a blood sample takes to clot in a clotting test. INR helps make results comparable across laboratories, so the International Normalized Ratio test can be read the same way on a lab report or blood test.

Activated Partial Thromboplastin Time (aPTT) is a lab measure of how long plasma takes to form a clot after a lab reagent is added. The aPTT test appears on coagulation panels and helps show how the clotting system is functioning on a lab report or blood test. High or low aPTT values can reflect changes in clotting factors, medicines, or sample handling.

Fibrinogen is a blood protein made by the liver that helps form clots. On a lab report, Fibrinogen reflects how much of this clotting protein is present in the sample and is often reviewed in the context of the coagulation panel. Higher or lower Fibrinogen values can shift how blood composition is interpreted alongside related markers.

D-Dimer is a lab value that measures fragments made when a cross-linked fibrin clot is broken down. It is reported on a blood test and helps describe recent clot turnover in the body. On a D-Dimer lab report, higher values can reflect more clot breakdown, while lower values mean less of these fragments are detected. The D-Dimer test is commonly grouped with coagulation studies and is often reviewed alongside other blood markers for a broader picture of blood composition.

Thrombin Time (TT) is a coagulation test result that measures how long a blood sample takes to form a clot after thrombin is added. TT on a lab report is used to describe clotting speed and can help show whether blood plasma has enough functional fibrinogen for clot formation. It is commonly reviewed with other coagulation tests to place the Thrombin Time test result in context.

Antithrombin III (AT III) is a blood protein that helps regulate clot formation by slowing specific clotting factors. On an Antithrombin III blood test, the result reflects how much AT III is present or how well it is working in the sample. AT III on a lab report is usually reviewed with other coagulation markers to understand the overall clotting picture.

Protein C is a vitamin K–dependent protein found in blood that helps regulate clotting. On a Protein C on a blood test or Protein C on a lab report, the result shows how much of this clot-regulating protein is present or active. The Protein C test is usually part of a coagulation panel and is read alongside other clotting markers.