Abstract: Coagulation control compositions suitable for use in connection with PT and/or APTT assays are disclosed along with their methods of preparation and methods of use. Preferred coagulation controls comprise plasma and an anticoagulant having activity for enhancing the activity of antithrombin III (ATIII) or of heparin co-factor II (HCII) against thrombin or against a clotting factor selected from the group consisting of factors IXa, Xa and XIa. The anticoagulant is preferably a glycosaminoglycan such as heparin, a heparin derivative or a heparin analog. The anticoagulant is preferably combined with (1) an abnormal plasma (e.g. activated plasma or factor-deficient plasma) and/or (2) a primate plasma (e.g. human plasma), and a non-primate mammalian plasma (e.g. bovine plasma). In the latter case, the non-primate mammalian plasma is preferably present in the coagulation control composition in an amount of not more than about 12% by volume, relative to total volume.

Abstract: Coagulation control compositions suitable for use in connection with PT and/or APTT assays are disclosed along with their methods of preparation and methods of use. Preferred coagulation controls comprise plasma and an anticoagulant having activity for enhancing the activity of antithrombin III (ATIII) or of heparin co-factor II (HCII) against thrombin or against a clotting factor selected from the group consisting of factors IXa, Xa and XIa. The anticoagulant is preferably a glycosaminoglycan such as heparin, a heparin derivative or a heparin analog. The anticoagulant is preferably combined with (1) an abnormal plasma (e.g. activated plasma or factor-deficient plasma) and/or (2) a primate plasma (e.g. human plasma), and a non-primate mammalian plasma (e.g. bovine plasma). In the latter case, the non-primate mammalian plasma is preferably present in the coagulation control composition in an amount of not more than about 12% by volume, relative to total volume.

Abstract: Coagulation control compositions suitable for use in connection with PT and/or APTT assays are disclosed along with their methods of preparation and methods of use. Preferred coagulation controls comprise plasma and an anticoagulant having activity for enhancing the activity of antithrombin III (ATIII) or of heparin co-factor II (HCII) against thrombin or against a clotting factor selected from the group consisting of factors IXa, Xa and XIa. The anticoagulant is preferably a glycosaminoglycan such as heparin, a heparin derivative or a heparin analog. The anticoagulant is preferably combined with (1) an abnormal plasma (e.g. activated plasma or factor-deficient plasma) and/or (2) a primate plasma (e.g. human plasma), and a non-primate mammalian plasma (e.g. bovine plasma). In the latter case, the non-primate mammalian plasma is preferably present in the coagulation control composition in an amount of not more than about 12% by volume, relative to total volume.

Abstract: A prothrombin time reagent is disclosed for use in a prothrombin time test. The reagent utilizes recombinant human tissue factor, phospholipids of a natural or synthetic origin, a buffer composition and calcium ion. Stabilizers and salts may also be utilized in the reagent. In addition, a method for creating lipid micelles containing tissue factor is also disclosed.

Abstract: Hematologic control and calibration standards are disclosed which are essentially plasma-free. These controls are prepared by the suspension of red blood cells in an appropriate buffer containing a stabilization effective amount of disaccharides, and other optional ingredients. Control and calibration standards prepared in the foregoing manner are suitable in the control and calibration of hematology analyzers for the following parameters: white cell count, red cell count, hemoglobin, hematocrit and the common derived parameters (i.e., mean cell volume, mean cell hemoglobin and mean cell hemoglobin concentration). The addition of platelets to the foregoing suspensions is also contemplated to provide a control for platelet parameters.