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HelpTest Code TROP High-sensitivity Troponin T
Additional Codes
LAB139
Collection Method
Venous collection
Container
Lt Green / Plasma Separator / Lithium Heparin
Specimen Type
Plasma:
- Light Geen Top (lithium heparin)
Minimum Volume
0.5ml
Specimen Stability
| Ambient | 2 hours |
| Refrigerated (4°C to 8°C) | 24 hours |
| Frozen(-40°C to 0°C) | 12 months |
Reference or Target Ranges
| Age | Male | Female |
| All ages | <22 | <14 |
Report Comment:
Diagnosis of Myocardial Infarction relies on detecting a rise and/or fall in cardiac troponin (cTn) levels with at least one value above the 99th percentile upper reference limit and correlating these with ischemic symptoms, ECG changes, or imaging findings. Elevated troponin levels can also occur in conditions such as myocarditis, heart contusion, pulmonary embolism, or drug‑induced cardiotoxicity.
Reportable Units
ng/L
Critical Value
≥23ng/L for males
≥15ng/L for females
Reasons for Rejection
| Hemolysis Threshold | 100 mg/dL |
| Icterus Threshold | 27 mg/dL |
| Lipemia Threshold | 1500 mg/dL |
| Other | QNS, contaminated, improperly Labeled, improper specimen type |
Performance Information
| Days and Time Performed | 24/7 |
| Expected Turn Around Time |
Stat: 1 hour Routine: 4 hours |
| Stat Availability | Yes |
| Performing Bench | CPH Chemistry |
| Methodology/Method Description | Roche Cobas |
CPT Codes
84484
Last review/edit date
2025