Abbott i-STAT 1 System Manual

Rev. Date: 11-Jul-11 Art: 714173-00M
SODIUM/NA
Sodium is measured by ion-selective electrode potentiometry. In the calculation of results for sodium,
concentration is related to potential through the Nernst equation.
The i-STAT System uses direct (undiluted) electrochemical methods. Values obtained by direct methods
may differ from those obtained by indirect (diluted) methods.
1
See below for information on factors affecting results. Certain substances, such as drugs, may affect
analyte levels in vivo.
2
If results appear inconsistent with the clinical assessment, the patient sample should be retested using
another cartridge.
Intended Use
The test for sodium, as part of the i-STAT System, is intended for use in the in vitro quantification of
sodium in arterial, venous, or capillary whole blood.
Sodium measurements are used for monitoring electrolyte imbalances.
Contents
Each i-STAT cartridge contains one reference electrode (when potentiometric sensors are included in
the cartridge configuration), sensors for the measurement of specific analytes and a buffered aqueous
calibrant solution that contains known concentrations of analytes and preservatives. For cartridges that
contain a sensor for the measurement of sodium, a list of reactive ingredients is indicated below:
Reactive Ingredient
Sodium (Na
+
)
Metrological Traceability
The i-STAT System test for sodium measures sodium amount-of-substance concentration in the plasma
fraction of arterial, venous, or capillary whole blood (dimension mmol L
-1
) for in vitro diagnostic use.
Sodium values assigned to i-STAT’s controls and calibration verification materials are traceable to the
U.S. National Institute of Standards and Technology (NIST) standard reference material SRM956. i-STAT
System controls and calibration verification materials are validated for use only with the i-STAT System
and assigned values may not be commutable with other methods. Further information regarding
metrological traceability is available from Abbott Point of Care Inc..
Expected Values
Reportable Reference
Test/Abbreviation Units* Range Range
3
Sodium/Na mmol/L (mEq/L) 100–180 138 – 146
*The i-STAT System can be configured with the preferred units.

Abbott i-STAT 1 Specifications

General

Brand	Abbott
Model	i-STAT 1
Category	Measuring Instruments
Language	English