i-Stat - ion-selective electrode potentiometry (Na, K), amperometry (creatinine),conductometry (hematocrit)
Performed at authorized locations by point of care operators
Sodium- monitoring electrolyte imbalances.
Potassium- monitoring and aiding in the diagnosis of diseases and clinical conditions that manifest high and low potassium levels.
Creatinine- used in the diagnosis and treatment of renal diseases, in monitoring renal dialysis, and as a calculation basis for measure other urine analytes.
Hematocrit- aid in the determination and monitoring of normal or abnormal total red cell volume status that can be associated with conditions including anemia and erythrocytosis.
Analyte reference ranges are available in the i-Stat test procedure located on the POC website: https://www.pathology.med.umich.edu/point-of-care.
•Specimens must be free of clots and fibrin strands.
•Prolonged tourniquet application (venous stasis) and forearm exercise may decrease pH due to localized production of lactic acid. This in turn can affect ionized calcium.
•Results may be affected in the following situations: hemolysis, traumatic draw, pumping fist during draw, extended delay between drawing and testing specimen, exposure to air, and obtaining specimen from an arm with an IV.
•Results outside the reportable ranges for the system will be display with a "<" or ">" symbol.
Collect in lithium heparin syringe/tube.
Samples must be tested within 30 minutes of collection and immediately after exposing the sample to room air.
For more test specific information, please refer to the test procedure found on the Michigan Medicine POC website: https://www.pathology.med.umich.edu/point-of-care