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Test Code TROPONIN Troponin-I

Clinical System Name

Troponin-I

Description

Following an AMI, the appearance of protein markers in the blood results from necrosis initiated by an ischemic event. The structural and mitochondrial proteins of the myocytes appear later following infarction, e.g., CK-MB and proteins of the troponin complex, including troponin I. The simultaneous quantification of myoglobin, CK-MB, and cardiac troponin I following AMI can greatly assist the physician in the management of patients suspected of presenting with an AMI. Other conditions that result in elevated cardiac proteins are:  cardiac contusions, myocarditis, invasive examination of the heart, coronary artery bypass surgery, heart transplant, congestive heart failure and unstable angina.

Sample Requirements

Specimen:  Whole blood

Container(s): Lavender/EDTA

Preferred Vol: 1 mL

Minimum Vol:  1 FULL Lavender/EDTA Microtainers or 0.5 mL EDTA whole blood

 

Notes: If testing can not be completed immediately or specimen is drawn off-site, separate plasma from cells and freeze at -20° C within 4 hours. 

 

Processing Instructions

Reject due to:  Incorrect specimen collection, Insufficient quantity of EDTA whole blood drawn, Age of specimen

Spin: N

Aliquot: N

Temp:  2-8oC

Storage location:  Core 5 Chemistry Refrigerator

 

Off-site collection:  Spin blood, separate plasma from cells within 4 hours of collection. Freeze at -20° C.

Stability

Specimen Type Temperature Time
EDTA Plasma RT

≤ 4 H

EDTA Plasma 2-8oC

≤ 4 H

EDTA Plasma -20oC or -70oC

≤ 365 D

 

 

Specimen Type Temperature Time
EDTA  Whole Blood RT

≤ 4 H

EDTA Whole Blood 2-8oC

≤ 4 H

 

Availability

STAT Performed TAT
Y 24/7 1 H

 

Performing Laboratory

Seattle Children's Laboratory    

Department

Department:  Core Chemistry

Phone Number: 206-987-2617

 

 

Reference Range

0 - 0.40 ng/mL

Methodology

Method:  Fluorescent Immunoassay (FIA) method by Triage MeterPro and Triage MeterPlus

Analytical Volume:  0.25 mL EDTA Whole Blood or  Plasma

CPT Codes

84484