Evaluation of an Ionized Calcium Analyser
Author Information
Author(s): Patrick Ferreira, Alan M. Bold
Primary Institution: University of Alberta Hospital, Canada; Queen Elizabeth Medical Centre, England.
Hypothesis
The SS-20 analyser's performance in measuring ionized calcium is evaluated against traditional methods.
Conclusion
The SS-20 analyser shows significant day-to-day variability in results, and whole blood samples are not recommended due to worse precision.
Supporting Evidence
- The SS-20 analyser's results were significantly lower than those from the spectrophotometric method.
- Day-to-day variability was observed in the SS-20 results despite standardization.
- Whole blood samples showed worse precision compared to plasma samples.
Takeaway
This study looked at a machine that measures calcium in blood and found it can give different results on different days, so it's important to check it regularly.
Methodology
The study involved using the SS-20 analyser to measure ionized calcium in blood samples and comparing results with spectrophotometric methods.
Potential Biases
The results may be affected by factors such as hematocrit and the type of tubing used.
Limitations
The SS-20 analyser showed day-to-day variability and was less precise with whole blood samples.
Participant Demographics
Group A: 20 healthy laboratory staff (10 male, 10 female, aged 18-50); Group B: 15 healthy university students (8 male, 7 female, aged 18-22).
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
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