Siemens Healthcare has developed Innovance Antithrombin, a new test for determining congenital and acquired antithrombin deficiency. Insufficient levels of protein in blood can lead to increased thrombophilia. Reason: Antithrombin ensures balanced blood coagulation by reducing the activity of thrombin and coagulation factor Xa which are responsible for blood coagulation. Innovance Antithrombin detects insufficient antithrombin activity, enabling the early detection of an increased risk of thrombosis in patients.
Innovance Antithrombin by Siemens Healthcare is a new chromogenic test for the automatic quantification of functionally active antithrombin in human citrated plasma. In contrast to antithrombin activity tests based on the inhibition of the coagulation factor thrombin, Innovance Antithrombin determines the activity of the antithrombin protein through the inhibition of coagulation factor Xa. This prevents distortion of the test result if a patient was given specific medication to prevent or treat thromboses, such as hirudin or other thrombin inhibitors. Innovance Antithrombin can be used with the automatic coagulation measuring devices from Siemens such as BCS and BCS XP as well as Sysmex CA-500, Sysmex CA-1500 and Sysmex CA-7000.
The new test by Siemens is also suitable for diagnosing congenital or acquired antithrombin deficiencies which are known to be linked with an increased risk of thrombosis. Antithrombin deficiencies manifest themselves in reduced activity of the antithrombin protein. Two types of congenital antithrombin deficiencies are distinguished: in case of deficiency type I, the total quantity of existing antithrombin protein is reduced, whereas in case of deficiency type II, the protein concentration is normal, but the protein is defective in respect of its inhibitor function. Acquired antithrombin deficiency exists if less antithrombin protein is produced or more is spent than usual. This may result, for example, from liver diseases, DIC (disseminated intravascular coagulation), sepsis, acute hemolytic transfusion reaction, nephrotic syndrome or major surgical interventions. The test can also serve for monitoring the substitution therapy with antithrombin concentrates.
The test kit components of Innovance Antithrombin are ready for use and therefore especially fast and easy to use. The test is based on a chromogenic measurement principle. Citrated plasma is mixed with a surplus of coagulation factor Xa. If heparin is present, part of coagulation factor Xa is bonded and deactivated by the antithrombin present in the specimen. Surplus, uninhibited coagulation factor Xa then splits a chromogenic substrate. In this process, coloring is released, the concentration of which is detected with a photometer. The higher the concentration of the produced coloring, the higher was the quantity of uninhibited coagulation factor Xa and the lower was the concentration of functionally active antithrombin originally present in the plasma specimen.
The Siemens Healthcare Sector is one of the world’s largest suppliers to the healthcare industry. The company is a renowned medical solutions provider with core competence and innovative strength in diagnostic and therapeutic technologies as well as in knowledge engineering, including information technology and system integration. With its laboratory diagnostics acquisitions, Siemens Healthcare is the first integrated healthcare company, bringing together imaging and lab diagnostics, therapy, and healthcare information technology solutions, supplemented by consulting and support services. Siemens Healthcare delivers solutions across the entire continuum of care – from prevention and early detection, to diagnosis, therapy and care. Additionally, Siemens Healthcare is the global market leader in innovative hearing instruments. The company employs around 49,000 people worldwide and operates in 130 countries. In the fiscal year 2008 (Sept. 30), Siemens Healthcare reported sales of €11.2 billion, orders of €11.8 billion, and Sector profit of €1.2 billion. Further information can be found by visiting
http://www.siemens.com/healthcare
