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Masimo signal extraction pulse oximetry.

J M Goldman1, M T Petterson, R J Kopotic

  • 1Masimo Corporation, 2852 Kelvin Avenue, Irvine, CA 92614, USA. JGoldman@Masimo.com

Journal of Clinical Monitoring and Computing
|February 13, 2003
PubMed
Summary
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Masimo Signal Extraction Technology (SET) pulse oximetry offers accurate SpO2 monitoring during patient motion and poor perfusion. This new technology overcomes limitations of conventional pulse oximetry (CPO) for reliable patient assessment.

Area of Science:

  • Biomedical Engineering
  • Medical Devices
  • Physiological Monitoring

Background:

  • Conventional pulse oximetry (CPO) struggles with accuracy due to patient motion, poor perfusion, ambient light, and electrosurgical interference.
  • Motion artifacts are a significant challenge, often caused by the assumption that only arterial blood affects light absorption.

Purpose of the Study:

  • To introduce and describe Masimo Signal Extraction Technology (SET) pulse oximetry.
  • To highlight its novel measurement paradigm designed for challenging clinical conditions.

Main Methods:

  • Masimo SET utilizes conventional photoplethysmographic signals combined with advanced techniques like radiofrequency and light-shielded sensors.
  • It employs digital signal processing and adaptive filtration for accurate SpO2 measurement.

Related Experiment Videos

  • A new conceptual model and discrete saturation transform (DST) isolate arterial saturation components, distinguishing them from non-arterial signals during motion.

    • Main Results:

    • Masimo SET can accurately measure SpO2 even with significant patient motion.
    • The technology identifies and differentiates non-arterial saturation components that arise during movement.
    • The system reports the highest O2 saturation component, representing true arterial SpO2.

    Conclusions:

    • Masimo SET pulse oximetry effectively enables continuous SpO2 monitoring.
    • The technology overcomes limitations of CPO in the presence of motion and poor tissue perfusion.