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Troponin I
Test Code2670
Preferred Specimen
One 3 mL plasma separator tube.
Minimum Volume
1 mL plasma (Min: 0.5 mL) at room temperature.
Transport Temperature
1 mL plasma (Min: 0.5 mL) at room temperature.
Specimen Stability
Ambient: 8 hours; Refrigerated: 2 days; Frozen: 6 months
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Samples exposed to multiple freeze/thaw cycles.
Methodology
Chemiluminescent Immunoassay
Setup Schedule
Sun-Sat
Report Available
"Routine within 4 hours
STAT within 1 hour"
STAT within 1 hour"
Limitations
Avoid serum samples. Remove plasma from cells ASAP. Samples must be free of particulate matter including fibrin which can interfere with the assay. For plasma samples: Avoid transferring material from the white blood cell/platelet layer located just above the red blood cells.
Clinical Significance
0.3 ng/mL or less : Negative - repeat testing in four to six hours if clinically indicated.Greater than 0.3 ng/mL: Suspicious for myocardial injury. Repeat testing in four to six hours if indicated.
