Accuracy and Precision of the i-STAT Portable Clinical
Analyzer : An Analytical Point of View
PHANNEE PIDETCHA, M.Sc.*,
SOMCHAI ORNVICHIAN, B.Sc. **,
SUKON CHALACHIV A, B.Sc., M.T. (ASCP)**
Affiliation : * Department of Clinical Chemistry, Faculty of Medical Technology, Mahidol University, Bangkok 10700, Thailand.
** Laboratory Department, Bamrungrad Hospital, Bangkok 10110, Thailand.
AbstractThe introduction of a new point-of-care testing (POCT) instrument into the market affects
medical practice and laboratory services. The i-STA T is designed to improve the speed in the
decision making of the medical profession. However, reliability of results would ensure the
quality of laboratoy data. We, therefore, made an evaluation of the performance of i-STAT using a
disposable cartridge EG7 + which is capable of measuring pH, p02, pC02 (blood gas), Sodium,
Potassium (Electrolytes), Ionized calcium and Hematocrit with only 10 f..ll of lithium heparinized
blood in 2 minutes. The results were compared with those obtained from routine methods. The
results were found to be accurate, precise and correlated with acceptable methods used routinely
in the laboratory.
Keywords : i-STAT, Point-Of-Care Testing, Blood Gas, Electrolytes, Ionized Calcium
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