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HelpTest Code TROPI Troponin I, Plasma or Serum
Methodology
Enzyme Immunoassay (EIA)Performing Laboratory
Aspen Valley HospitalPhysician Office Specimen Requirements
Submit only 1 of the following specimens:
Preferred:
Plasma
Container/Tube: Light green-top (lithium heparin gel) tube(s)
Specimen: 2 mL (minimum volume: 1 mL) of lithium heparin plasma
Transport Temperature: Ambient
Collection Instructions: Spin down immediately and send entire tube to laboratory. If there is a delay in transport of >8 hours, send specimen refrigerated.
Note: 1. Indicate plasma on request form.
2. Label specimen appropriately (plasma).
Alternate:
Serum
Container/Tube: Gold-top (serum gel) tube(s) or orange-top tube(s) - Plain, red-top tube is also acceptable.
Specimen: 2 mL (minimum volume: 1 mL) of serum
Transport Temperature: Ambient
Collection Instructions: Allow specimen to clot for approximately 10 minutes and spin down. If drawing gold-top serum gel tube, send entire tube to laboratory. If drawing orange-top tube or plain, red-top tube, remove serum and place in separate plastic vial. If there is a delay in transport of >8 hours, send specimen refrigerated.
Note: 1. Indicate serum on request form.
2. Label specimen appropriately (serum).
Reference Values
Normal: <0.100 ng/mLBorderline: 0.100-0.600 ng/mL (May be indicative of minor cardiac injury or unstable angina with adverse risk stratification. Recommend serial monitoring.)
Consistent with the WHO criteria for acute MI: >0.600 ng/mL (Recommend serial monitoring.)
Critical value (automatic call-back): >0.099 ng/mL