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Troponin I
0090613
Ordering Recommendation

Recommended test for the diagnosis and management of acute coronary syndrome.

Mnemonic
TNI
Methodology
Chemiluminescent Immunoassay
Performed
Sun-Sat
Reported
Within 24 hours
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
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).  Plasma and serum specimens should not be submitted interchangeably on the same patient with muliple draws. 
Storage/Transport Temperature
Frozen. 
Unacceptable Conditions
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 NameLOINC
0090613Troponin-I10839-9
* 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.
Aliases
  • Troponin inhibitory subnunit