Evaluating the ABL 500 Blood Gas Analyser
Author Information
Author(s): B. Gouget, R. Andriamahatratra, Y. Gourmelin, A. Truchaud
Primary Institution: Laboratoire de Biochimie, Centre hospitalier général, Meaux, France
Hypothesis
How accurate is the pO2 measurement of the ABL 500 blood gas analyser compared to other methods?
Conclusion
The ABL 500 blood gas analyser demonstrated high precision but showed slight overestimation of pO2 values at high levels.
Supporting Evidence
- The ABL 500 showed coefficients of variation for pO2 and pCO2 that were below acceptable levels.
- Inter-instrument comparisons indicated that pCO2 values were slightly lower on the ABL 500 than on the Ciba Corning 178.
- Linearity studies showed a slight overestimation of pO2 values above 150 mmHg.
Takeaway
The ABL 500 blood gas analyser is good at measuring blood gases, but it sometimes gives slightly higher oxygen readings than it should.
Methodology
The study compared pO2 measurements from the ABL 500 with those from the Ciba Corning 178 analyser using two tonometry methods.
Potential Biases
Potential biases due to sample handling and the method of sample introduction.
Limitations
The study noted discrepancies in pO2 measurements at high levels and the limitations of tonometry as a reference method.
Participant Demographics
Blood samples were obtained from healthy donors and hospitalized patients.
Statistical Information
Statistical Significance
p<0.05
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