Test Overview
Test Methodology

Mechanical endpoint clotting mechanism which is monitored optically via LED sensors.

Test Usage

Emergency room patients that are being evaluated with stroke protocol.

Reference Range *

Reference range may change over time. Please refer to the original patient report when evaluating results

Test Limitations

Sample must be collected in a manner that prevents contamination with tissue thromboplastin, indwelling intravenous solutions or alcohol cleaning solutions that interfere with coagulation assays. Use of the glass collection tube is prohibited. Specimen are Hemolyzed, clotted or partially clotted, presence of unexpected anticoagulant should to be used for testing

Test Details
Days Set Up
Continuous, 24 hours
Analytic Time

Dependent on patient's coagulation status, analyzer reports up to 500 seconds.

Soft Order Code
ERPT
MiChart Code
ED POC INR (PT), ED lab
Laboratory
Chemical Pathology
Section
Automation
Specimen Requirements
Contraindications
Patient's who have hematocrit levels of < 20 or > 55 % should not be tested using this method.
Normal Volume
Sodium citrated light blue top must be 90% full
50 uL
Storage Temperature
Room temperature
Rejection Criteria
Light blue sodium citrated tube must be filled 90% for testing
Billing
CPT Code
85610
LOINC
INR 34714-6, Seconds 5964-2
NY State Approved
No