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Test Code G5TNT High-Sensitivity Cardiac Troponin T (Generation 5)

Important Note

For the in-house troponin algorithm, please see this link.

For FAQ on High-Sensitivity Troponin T, please see this link.

For the full presentation on High-Sensitvity Troponin T, please see this link.

This test is available for inpatient, Emergency Department, and Cardiology providers only.

Additional Codes

Software Test Code - Standalone Test Code - Serial 
Label Text                         G5TNT HSTB or HST2 or HST4      
EPIC LAB20601                           LAB20610

Performing Laboratory

NorDx Laboratories

Useful For

Assisting in the diagnosis of acute coronary syndromes in patients with chest pain

Method Name

Electrochemiluminescent Immunoassay (ECLIA)

Reference Values

Non-elevated

  • < 11 ng/L Female/Unknown/Neutral 
  • < 14 ng/L Male 

Elevated

  • > 50 ng/L

Indeterminate

  • All other results

Days and Times Test Performed

Monday through Sunday

Report Available

1 Day

Available Stat (inpatient and ED only)

Specimen Type

Plasma

Preferred Container

Plasma Separator Tube (PST)

Preferred Volume

Plasma: 1 mL (Plasma Separator Tube (PST))

Minimum Volume

Collecting minimum volumes can result in a need for sample recollection, and/or a delay in results. Minimum volumes are subjective and cannot account for all aspects of specimen and testing needs. Refer to the Preferred Volume section for optimal volumes for laboratory specimens.

 

Plasma: 0.3 mL (Plasma Separator Tube (PST))

Specimen Collection and Handling

For Standalone Troponin:  Spin specimen, separate from cells and send refrigerated.

 

For Serial Troponin:

  1. When the Troponin panel is ordered, the baseline Troponin order is the only visible order .
  2. The 2-hour Troponin order will be ordered when the baseline Troponin is Marked as Received in Epic by the lab and will be scheduled for 2-hours after the collection time of the baseline Troponin.
  3. The 4-hour Troponin will also be automatically ordered UNLESS:
  • Baseline Troponin is normal and delta is < 4 ng/L
  • Or:  Baseline Troponin is > 50 ng/L
  • Or:  2 hour Troponin is > 50 ng/L
  • Or:  Delta is > 10 ng/L

Please see the Troponin tip sheet for more information.

 

Each specimen must be spun and separated prior to analysis.

Specimen Stability Information

Specimen Type: Plasma

Refrigerated (2 - 8oC): 1 Day

Frozen (below -20oC):  12 months

Must be spun/separated within: 2 Hours

Add On Capable

Yes

Advance Beneficiary Notice Requirements

No ABN Required

CPT Code Information

CPT Code

CPT Description

CPT Disclaimer
84484 Troponin, Quantitative  

Performing Laboratory Location

NorDx Laboratories

Acceptable Alternative Container(s)

Dark Green Top Tube (Lithium Heparin) - plasma only

Rejection Information

Serum 

Non-Lithium Heparin Plasma

Lithium Heparin whole blood (has not been spun down within 2 hours of collection)