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Comparison of three transmittance oximeters
Medical Instrumentation
|May 1, 1986
Summary
Different pulse oximeters provide varying oxygenation estimates. The Biox III showed higher readings than Nellcor and Hewlett-Packard, impacting hypoxia response measurements.
Area of Science:
- Medical Devices
- Respiratory Physiology
- Clinical Measurement
Background:
- Non-invasive transmittance oximeters are crucial for monitoring oxygenation.
- Accurate oxygen saturation (SpO2) readings are vital for assessing respiratory function.
Purpose of the Study:
- To compare oxygenation estimates from three transmittance oximeters: Hewlett-Packard 47201A, Nellcor, and Biox III.
- To evaluate the impact of oximeter discrepancies on the measurement of ventilatory response to hypoxia.
Main Methods:
- Simultaneous SpO2 measurements were taken from ten healthy subjects.
- Subjects underwent isocapnic progressive hypoxia and episodic hypoxemia.
- Data from Hewlett-Packard, Nellcor, and Biox III oximeters were analyzed.
Main Results:
- Nellcor readings were 2-4% lower than Hewlett-Packard.
- Biox III readings were 3-7% higher than Hewlett-Packard, especially below 80% SpO2.
- Discrepancies significantly affected ventilatory response to hypoxia estimations (P < 0.005).
Conclusions:
- Significant differences exist between transmittance oximeters.
- These variations impact clinical assessment of hypoxic ventilatory response.
- Oximeter choice influences the estimation of hypoxic drive in respiratory conditions.