Test Overview
Test Methodology

i-STAT

Test Usage

Marker of myocardial injury. Troponin I is one of three proteins of the troponin complex that regulates the calcium mediated interaction of actin and myosin. Troponin I demonstrates slightly better cardiac specificity than does CK-MB. Serum levels of troponin I begin to rise 4 to 8 hours after an acute myocardial infarction, and remain elevated for the next 48 to 72 hours. Troponin I may be elevated in a number of cardiac conditions other than AMI, including unstable angina.

Reference Range *

< 0.20 ng/mL

Test Details
Days Set Up
Daily, 24 hours
Soft Order Code
ETROP
MiChart Code
Troponin, Point of Care
Synonyms
  • TROPONIN-I, POC
  • TROP POC
  • POC TROP
  • Troponin
Laboratory
Chemical Pathology
Section
Point of Care
Specimen Requirements
Collection Instructions

Collect specimen in a green top tube.

Additional Information

All Troponin requests from the ER will be performed on the i-STAT analyzer. Troponin values greater than or equal to 0.20 ng/mL are considered abnormal by this method. Please note that this reference range differs from that of the Chemistry Lab Troponin-I assay (<0.30 ng/mL). In the appropriate clinical setting, an elevated Troponin-I concentration and the presence of rising or falling levels with time are consistent with acute coronary syndrome.

Billing
CPT Code
84484
Fee Code
30585
NY State Approved
No