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Test Code TRTWD Troponin-T High Sensitivity with Delta

Important Note

Test is only available for Emergency Department patients.

Performing Laboratory

Hunterdon Medical Center

Useful For

High sensitivity Cardiac Troponin T (cTnT) is useful for monitoring acute coronary syndromes including myocardial infarction and is associated with an improved rule-out process.

To distinguish between acute and chronic cardiac troponin elevation a High Sensitivuty Troponin with Delta (TRTWD) may be ordered two to three hours following the initial Troponin T test, at the discretion of the ordering physician. Serial testing is available only for ED patients.

A serial Troponin test is collected and the subsequent results are compared to the baseline test and the delta change is calculated.

 

Troponin-HS ED Algorithm

Specimen Requirements

 Container/Tube                 
 Preferred   PST (Li Hep) Gel- Mint Green Top  
 Acceptable   Green Top
 Specimen Volume   1.0mL
 Minimum Volume   0.5mL

Specimen Type

Lithium Heparin Plasma

Specimen Transport

Ambient

Specimen Stability

  Temperature   Time Frame  
  Refrigerated 2-8°C     24 hours

Reject Specimen Due To

Gross hemolysis

Day(s) Test Set up

Monday through Sunday

Profile Information

  Profile Components    Always Performed 
  Troponin-T HS, Subsequent    Yes
  Troponin-T HS, Baseline                 Baseline Result
  Delta    Yes

Reference Values

 

  Reference Values  * Note difference in units
  Female   ≤ 14ng/L*
  Male   ≤ 22ng/L*
  Critical Value   >52 ng/L*
 Indeterminate   Range  
  Female   15-52 ng/L
  Male   23-52 ng/L
    Troponin is moderately elevated but does not confirm myocardial injury
  Delta  
  Reference Value   0-6 ng/L
  Interpretation  Rule in possible AMI if delta change is >9ng/L, in conjunction with other clinical parameters.

Methodology

Electrichemiluminescence Immunoassay: ELCIA

CPT Code

84484

Loinc Code

67151-1