Troponin I

Container: Serum (Gold top)

Sample type: Serum

Test name: Troponin I a.k.a. TnI

Condition / Indication: Myocardial Infarction (MI) / Acute Coronary Syndrome (ACS)

Special precautions & notes: The Troponin I assay is susceptible to positive interference from fibrin deposits or clots causing a falsely high result. This is more likely to occur when a small sample volume is sent. Please ensure full tubes of blood are taken and send a prompt repeat if the Troponin I result does not fit with the clinical picture. Note serum SST and Li heparin tubes should not be used interchangably.

Reference range: The 99th centile of the normal population reference range for Troponin I is 18ng/L but interpretation is only possible in the context of the clinical presentation and ECG findings. A single Troponin I below 18ng/L at presentation does not exclude acute coronary syndrome. See acute coronary syndrome pathway for more details.

Container: Serum (Gold top)

Alternative container: Li heparin (green top)

Ideal volume (mL): 5 mL

Referred outside NBT for analysis? No

Discipline: Clinical Biochemistry

Section: Automated Laboratory

Turnaround time: 4 hours