Troponin I
0090613
Ordering Recommendation
Recommended test for the diagnosis and management of acute coronary syndrome.
Submit With Order
Mnemonic
TNI
Methodology
Chemiluminescent Immunoassay
Performed
Sun-Sat
Reported
Within 24 hours
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
 
Collect
Plasma separator tube.  
Specimen Preparation
Remove plasma from cells ASAP or within 2 hours of collection. Specimen must be free of particulate matter including fibrin which can interfere with the assay. Avoid transferring material from the white blood cell/platelet layer located just above the red blood cells. Transport 1 mL plasma. (Min: 0.5 mL)  
Storage/Transport Temperature
Frozen.  
Unacceptable Conditions
Serum. Specimens exposed to repeated freeze/thaw cycles.  
Remarks
 
Stability
Ambient: 8 hours; Refrigerated: 72 hours; Frozen: 1 month  
Reference Interval
Effective May 21, 2012
0.0-0.03 ng/mL
Interpretive Data
0.03 ng/mL or less: Negative - repeat testing in four to six hours if clinically indicated.
0.04-0.29 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.
0.30 ng/mL or greater: Consistent with myocardial injury. Clinical and laboratory correlation recommended.
Note
CPT Code(s)
84484
Components
Component Test Code*Component Chart Name
0090613Troponin-I
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Cross References
  • Troponin inhibitory subnunit