Rev. Date: 01-Aug-11 Art: 714178-00L
HEMATOCRIT/HCT AND
CALCULATED HEMOGLOBIN/HB
Hematocrit is determined conductometrically. The measured conductivity, after correction for electrolyte
concentration, is inversely related to the hematocrit.
See below for information on factors affecting results. Certain substances, such as drugs, may affect analyte
levels in vivo.
1
If results appear inconsistent with the clinical assessment, the patient sample should be retested using
another cartridge.
Intended Use
The test for hematocrit, as part of the i-STAT System, is intended for use in the in vitro quantification of
packed red blood cell volume fraction in arterial, venous, or capillary whole blood.
Hematocrit measurements can aid in the determination and monitoring of normal or abnormal total red
cell volume status including, but not limited to, conditions such as anemia, erythrocytosis, and blood loss
related to trauma and surgery.
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 of known conductance that contains known concentrations of analytes and preservatives.
Metrological Traceability
The i-STAT System test for hematocrit measures packed red blood cell volume fraction in arterial, venous,
or capillary whole blood (expressed as the % packed cell volume) for in vitro diagnostic use. Hematocrit
values assigned to i-STAT’s working calibrators are traceable to the U.S. National Committee for Clinical
Laboratory Standards (CLSI) H7-A3 procedure for determining packed cell volume by the microhematocrit
method
2
. Further information regarding metrological traceability is available from Abbott Point of Care Inc..
Expected Values
Reportable Reference
Test/Abbreviation Units* Range Range
3
Hematocrit/Hct %PCV 10 – 75 38 – 51**
Fraction 0.10 – 0.75 0.38 – 0.51
Hemoglobin/Hb g/dL 3.4 – 25.5 12 – 17
g/L 34 – 255 120 – 170
mmol/L 2.1 – 15.8 7 – 11
* The i-STAT System can be configured with the preferred units.
**The reference ranges for hematocrit and hemoglobin span both female and male populations.
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