ARUP's Laboratory Test Directory
| 0090613: Troponin I |
| Test Mnemonic: TNI | |
|
Methodology: Chemiluminescent Immunoassay
Performed: Sun-Sat Reported: Within 24 hours |
| Specimen Required: | |
|
Collect: One 3 mL PST.
Transport: 1 mL plasma, frozen. (Min: 0.5 mL) Pediatric Collection/Transport: 0.5 mL plasma, frozen. Remarks: Avoid serum samples. Remove plasma from cells ASAP. Samples must be free of particulate matter including fibrin which can interfere with the assay. If testing cannot be performed within 48 hours of collection, ship frozen. For plasma samples: Avoid transferring material from the white blood cell/platelet layer located just above the red blood cells. Unacceptable Conditions: Samples exposed to multiple freeze/thaw cycles. Stability: Ambient: 8 hours; Refrigerated: 2 days; Frozen: 6 months |
|
| Reference Interval: |
| 0.0-0.05 ng/mL |
| Interpretive Data: | |
|
0.05 ng/mL or less : Negative - repeat testing in four to six hours if clinically indicated. 0.06-0.49 ng/mL: Suspicious for myocardial injury. Serial measurements may be necessary to confirm or exclude the diagnosis of acute coronary syndrome. Repeat testing in four to six hours if indicated. 0.50 ng/mL or greater : Consistent with myocardial injury. Clinical and laboratory correlation recommended. |
| CPT Code(s): | |
| 84484 |