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Test Code Troponin I Gen 5 Troponin I Gen 5

Aliases

 Troponin I 5th Generation

Patient Preparation

No special patient preparation required

Collection Method

Venous collection

Minimum Volume

  • Adults: 0.8ml
  • Pediatric: 0.5mL

Container

Lt Green / Plasma Separator / Lithium Heparin

Preferred Specimen

Light Green Top (lithium heparin) plasma

Acceptable Specimens

Plasma:

  • Light Geen Top (lithium heparin)

Reference or Target Ranges

0 hour result Interpretation
Female ≤34 ng/L
Male ≤53 ng/L
Unk ≤45 ng/L
AND pain onset >3 hours		 Low Risk for Acute Myocardial Injury
AND pain onset < 3 hours Repeat: 2 hour cTNI

F: 35-120; M: 54-120; Unknown: 46-120 ng/L
Repeat: 2 hour cTNI
All: > 120 ng/L High Risk for Acute Myocardial Infarction
2 Hour Result and Delta value  
All: < 120 and delta ≤15 ng/L increase Low Risk for Acute Myocardial Injury
All: > 120 OR delta > 15 ng/L increase Intermediate / High Risk for Myocardial Injury

Troponin I Delta value is defined as change from the first reported value of a series of troponin test results during the current admission. Please note that the value resets after intervals of more than 8 hours. ΔTroponin=Troponin (current) – troponin (initial)

Reportable Units

ng/L

Critical Value

Not defined for this assay

Reasons for Rejection

Hemolysis Threshold 500 mg/dL
Icterus Threshold 20 mg/dL
Lipemia Threshold 1000 mg/dL
Other QNS, contaminated, improperly Labeled, improper specimen type

Specimen Stability

Ambient 8 hours
Refrigerated (4°C to 8°C) 24 hours
Frozen(-40°C to 0°C) 12 months

Performance Information

Days and Time Performed 24/7
Expected Turn Around Time Stat: 1 hour
Routine: 4 hours
Stat Availability Yes
Performing Bench UH Chemistry
Methodology/Method Description Siemens Atellica - Immunoassay

Additional Information/Important Notes

For more information and to review the testing flow chart please view the policy in Navex:
Cardiovascular Services – Acute Coronary Syndrome (ACS)Assessment 

Troponin test results (absolute and relative) should be assessed in conjunction with other clinical information such as history, clinical presentation, history, exam, ECG and other cardiac evaluation. Sequential troponin testing may be necessary to document changing concentrations at 2 and 6 hours after initial troponin to evaluate for acute myocardial injury.

CPT Codes

84484