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Performance of Gem Premier blood gas/electrolyte analyzer evaluated
E Jacobs1, M Nowakowski, N Colman
1Department of Pathology, Mount Sinai School of Medicine, Mount Sinai Hospital, New York, NY 10029.
Clinical Chemistry
|September 1, 1993
Summary
The Gem Premier analyzer offers precise point-of-care testing for blood gases and electrolytes. Its accuracy is excellent for most analytes, making it a reliable tool for clinical diagnostics.
Area of Science:
- Clinical Chemistry
- Medical Diagnostics
- Point-of-Care Testing
Background:
- Point-of-care testing (POCT) requires accurate and reliable analyzers for rapid diagnostic results.
- The Gem Premier system is a novel device designed for comprehensive POCT of critical blood analytes.
Purpose of the Study:
- To evaluate the precision and accuracy of the Gem Premier system for blood gas, electrolyte, and hematocrit analysis.
- To assess the suitability of the Gem Premier for point-of-care diagnostic applications.
Main Methods:
- The Gem Premier system, comprising an analyzer and disposable cartridges, was tested using aqueous control materials.
- Imprecision was determined by calculating the coefficient of variation (CV) for each analyte.
- Accuracy was assessed through split-sample comparisons with established analyzers: Radiometer ABL 330, Nova Stat Profile 5, and IL Phoenix.
Main Results:
- Total imprecision (CV) ranged from 0.10% for pH to 5.78% for PCO2.
- Excellent regression statistics were observed for pH, PCO2, PO2, potassium, ionized calcium, and hematocrit.
- Sodium analysis showed some variability with Sy[x values between 1.80 and 2.30 mmol/L and correlation coefficients (r) between 0.85 and 0.90.
Conclusions:
- The Gem Premier system demonstrates high precision and accuracy for most tested analytes, suitable for point-of-care blood gas and electrolyte testing.
- While generally accurate, the sodium results warrant consideration in clinical decision-making.
- The system's design and performance indicate its potential as a valuable tool in decentralized laboratory settings.