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Test Code HSTNTI or LAB2674 Troponin T, Initial Chest Pain Protocol. Plasma

Important Note

The primary use of the troponin assay is to detect the presence of an active acute coronary syndrome (ACS). Since a positive test result could constitute a medical emergency, patients should be tested for this condition in a monitored setting.

If you suspect an outpatient may have an ACS and feel ordering a troponin is warranted, it is strongly recommended that the patient be directed to a higher level of care for ongoing monitoring.

For additional information, Under "Resources" on this page, see the Labwire article describing changes in test methodology (from Generation 4) effective 11/5/18 and an update effective 7/16/19.

Specimen Requirements

Container Type:

 Optimal: Mint

 

Acceptable: Green
Optimal Collection Volume: 

4.5mL; full tube
Minimum Volume:

1 mL whole blood
Collection Instructions:

Gently invert the sample 5-6 times after collection.
Specimen Transport:

Refrigerate
Processing Instructions: 
  1. Centrifuge specimen immediately upon receipt. 
  2. After centrifugation, specimen tubes without a gel barrier should have the plasma aliquoted to a false bottom container.

Specimen Stability

Specimen Type Temperature Time
Plasma Refrigerated 24 hours
Frozen 12 months

Specimen Rejection Criteria

Hemolysis Mild OK; Moderate OK; Gross Reject
Lipemia Mild OK; Moderate OK; Gross Reject
Icterus Mild OK; Moderate OK; Gross Reject
Other Quantity not sufficient

Useful For

This assay is intended to be used as an aid in the diagnosis of myocardial infarction.

Methodology

Roche Cobas - Electrochemiluminescence immunoassay

Reference Ranges

Gender

Reference Range and Reporting Units

Male

< 22 ng/L

Female

< 14 ng/L

Interpretive

Bronson Troponin Testing Algorithm

Day(s) Performed

24/7

Expected TAT

Same day

Performing Laboratory

Bronson Laboratory, Chemistry - Kalamazoo, Battle Creek, Paw Paw, South Haven

Sample Retention Time

7 days

CPT Code

84484