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The PATHFAST® cTnl Calibrators are for calibration of the PATHFAST® system when used for the quantitative determination of cardiac Troponin I in human heparinized or EDTA whole blood and plasma.

The PATHFAST cTnl Calibrators are for calibration of the PATHFAST cTnl-II test performed on the PATHFAST instrument. PATHFAST cTnI-II test is an in vitro diagnostic test for the quantitative measurement of cardiac Troponin I (cTnl) in heparinized or EDTA whole blood and plasma. Measurements of cardiac Troponin I are used as an aid in the diagnosis of acute myocardial infarction. Currently, PATHAST cTnl Calibrators 1 and 2 are provided as lyophilized products of two vials each. Calibrator 1 consists of buffer only and Calibrator 2 consists of cTnI complex in buffer. Four vials of calibrator diluent also are provided for reconstitution of the calibrators. The diluent consists of an aqueous solution with 0.05% sodium azide. This Special 510(k) is being submitted for a change to a liquid Calibrator 1 formulation and a new dropper bottle container. There are no changes to PATHFAST cTnl Calibrator 2. As a result of elimination of the reconstitution step for PATHFAST cTnI Calibrator 1, the number of bottles of Calibrator Diluent is being reduced from four bottles to two bottles.

The PATHFAST® CK-MB-11 Calibrators are for calibration of the PATHFAST® system when used for the quantitative determination of creatine kinase-MB in human heparinized or EDTA whole blood and plasma.

The PATHFAST CK-MB-II Calibrators are used for calibration of the PATHFAST CK-MB-11 test performed on the PATHFAST instrument. PATHFAST CK-MB-II test is an in vitro diagnostic test for the quantitative measurement of creatine kinase-MB in heparinized or EDTA whole blood and plasma. Currently, PATHAST CK-MB-II Calibrators 1 and 2 are provided as lyophilized products of two vials each. Calibrator 1 consists of saline and a preservative, and Calibrator 2 consists of CK-MB in buffer. Four vials of calibrator diluent also are provided for reconstitution of the calibrators. The diluent consists of an aqueous solution with 0.05% sodium azide. This Special 510(k) is being submitted for a change to a liquid Calibrator 1 formulation and a new dropper bottle container. There are no changes to PATHFAST CK-MB-11 Calibrator 2. As a result of elimination of the reconstitution step for PATHFAST CK-MB-II Calibrator I, the number of bottles of Calibrator Diluent is being reduced from four bottles to two bottles.

PATHFAST® cTnl-II test is an in vitro diagnostic test for the quantitative measurement of cardiac Troponin I (cTn!) in heparinized or EDTA whole blood and plasma. Measurements of cardiac Troponin I are used as an aid in the diagnosis of acute myocardial infarction. This method is for use in clinical laboratory or point of care (POC) settings. The PATHFAST® cTnl Calibrators are for calibration of the PATHFAST® system when used for the quantitative determination of cardiac Troponin I in human heparinized or EDTA whole blood and plasma.

The PATHFAST cTnl-II assay is for the quantitative measurement of human cardiac troponin I in heparinized or EDTA whole blood or plasma. The assay is designed for use on the PATHFAST instrument. The PATHFAST cTnl-II test is a chemiluminescent enzyme immunoassay performed on the PATHFAST instrument. Patient samples, whole blood or plasma, are dispensed by the operator into the designated area on the reagent cartridge. The instrument combines the patient sample, the antibody coated magnetic particles, and the alkaline phosphatase conjugate and incubates the mixture for 5 minutes at 37°C. During this incubation, the analyte in the patient sample binds to the antibody on the coated particles, and the alkaline phosphatase conjugate binds to the analyteantibody-coated particle. After the incubation, the instrument performs Bound/Free (B/F) separation using Magtration® technology to remove any excess unbound reagents. The chemiluminescent substrate is then added. The substrate is catalyzed by the bound alkaline phosphatase, which results in emission of photons. The photo-multiplier tube in the PATHFAST instrument detects the photons that are emitted during the reaction. The chemiluminescent count is converted to analyte concentration values by the instrument based on the master calibration curve for the reagent lot.