Rev. Date: 25-Jan-10 Art: 714178-01J 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. 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