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Related Experiment Videos

Oximeter reliability in a subzero environment

A J Macnab1, M Smith, N Phillips

  • 1British Columbia Children's Hospital, Department of Pediatrics, University of British Columbia, Vancouver, Canada.

Aviation, Space, and Environmental Medicine
|November 1, 1996
PubMed
Summary
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Two portable pulse oximeters reliably measured oxygen saturation in subzero temperatures, while one failed. This is crucial for pre-hospital care providers operating in cold environments.

Area of Science:

  • Medical Devices
  • Physiological Monitoring
  • Environmental Medicine

Background:

  • Pulse oximeters are vital for pre-hospital care.
  • British Columbia ambulance teams frequently work in subzero conditions.
  • The reliability of portable pulse oximeters in extreme cold is not well-established.

Purpose of the Study:

  • To assess the performance of three commercial portable pulse oximeters in subzero temperatures.
  • To determine if cold environments significantly affect oxygen saturation (SaO2) readings.

Main Methods:

  • Three pulse oximeters were tested in a controlled subzero environment (-15°C to -30°C) using dry ice.
  • Readings were compared against a Hewlett Packard control unit at room temperature, validated by co-oximetry.
  • Subjects were pediatric intensive care patients.

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Main Results:

  • Two oximeters (Propaq 106EC and Nonin 8500N) functioned accurately at temperatures below -15°C.
  • Siemens Micro O2 failed to operate at the tested subzero temperatures.
  • All collected data were acceptable for analysis.

Conclusions:

  • The Propaq 106EC and Nonin 8500N are reliable for use in subzero environments.
  • Organizations like the military, Coast Guard, and Mountain Rescue must verify oximeter function in extreme cold.
  • The study provides a method for testing oximeter reliability in cold conditions.