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Test Code
MIRO1
Test Name
HS Troponin, Hr 1
CPT Codes
84484
Included Tests
  • High Sensitivity Troponin, Hour 1
  • Delta Value: High Sensitivity Troponin Hour 1 - High Sensitivity Troponin Hour 0
Expected Turnaround Time
1 day
Clinical Utility
High-Sensitivity Troponin I is used for the quantitative determination of cardiac troponin I in human plasma and can aid in diagnosing acute myocardial infarction (AMI).
Specimen and Container Info

Specimen Type: Plasma

Collection Container: Light Green Top, Plasma Separator 

Minimum Acceptable Volume: 0.8 mL
Processing and Submission Instructions

Tubes with anticoagulant: To ensure accurate test results, all tubes containing an anticoagulant or preservative must be allowed to fill completely. Attempts to force more blood into the tube by exerting pressure, as in collection with a syringe, will result in damage to the red cells (hemolysis).
Transport Instructions

Transport to the laboratory refrigerated.
Stability Requirements

Room Temperature

8 hours

Refrigerated

48 hours
Methodology
Chemiluminescent Immunoassay
Reference Intervals
Female 99th percentile (upper reference limit): 12 ng/L
Male 99th percentile (upper reference limit): 20 ng/L
Limit of quantitation of the assay: 3 ng/L

Low risk category:
Symptom onset <3 hrs:  0 hr <5 ng/L AND 1 hr Delta (Δ) of <4 ng/L     

Symptom onset >3 hrs:  0 hr <4 ng/L

Intermediate risk category:
Symptom onset < 3 hrs: 0 hr ≥ 5 ng/L and ≤ 50 ng/L OR 1 hr Delta ≥ 4 ng/L and ≤ 15 ng/L

Symptom Onset > 3 hrs: 0 hr ≥ 4 ng/L and ≤ 50 ng/L

High risk category:

 0 hr >50 ng/L OR 1 hr Delta (Δ) of >15 ng/L   

This assay should not be used for patients taking asfotase alfa (i.e. Strensiq).

Alkaline phosphatase levels above 400 U/L may cause falsely elevated results.
Critical Values

HNL Lab Medicine Critical Values
Performing Location
17th Street Hospital, Carbon Hospital, Cedar Crest Hospital, Cedar Crest Red Lab, Dickson City Hospital, Hazleton Hospital, Hecktown Oaks Hospital, Muhlenberg Hospital, Pocono Hospital, Schuylkill Hospital
Testing Schedule
Routine daily, STAT testing available
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
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