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Blood Sciences

Blood Test Information

Troponin I
(a.k.a TnI, Troponin)
minimum sample volume required ~ 5ml

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Test Code: TNI

Tube type: SST

Other acceptable tube types
Lithium heparin (pale green)

Special instructions
See Chest Pain Protocol on A&E & Cardiology. Timing details mandatory or (for samples from A&E) state if sample is an 'admission' sample in clinical details.

Time limit for add on
24 hours post collection

Reference Range

<20 Normal troponin
20 - 49 Indeterminate troponin
>49 Positive troponin
<12 Normal troponin
12 - 49 Indeterminate troponin
>49 Positive troponin


Turnaround Time
1 day

Department: Biochemistry

Clinical Application
hsTropI should be interpreted in the context of the RUH Acute Coronary Syndrome (ACS) pathway.
An isolated troponin does not exclude ACS.

NOTE: As of 10/01/23 Troponin I replaces Troponin T.


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