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Related Experiment Videos

Pulse oximetry in severe anaemia.

T Ramsing1, J Rosenberg

  • 1Department of Surgical Gastroenterology 235, Hvidovre University Hospital, Denmark.

Intensive Care Medicine
|January 1, 1992
PubMed
Summary

Pulse oximetry can measure oxygen saturation in patients with severe anemia. However, readings may vary between devices, suggesting careful interpretation is needed.

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Area of Science:

  • Medical Devices
  • Critical Care Medicine
  • Physiology

Background:

  • Pulse oximetry is a standard method for monitoring arterial oxygen saturation.
  • Severe anemia presents challenges for accurate oxygen saturation measurement due to reduced hemoglobin capacity.

Observation:

  • Two pulse oximeters (Radiometer OXI, Nellcor N-200) were used to measure oxygen saturation in patients with severe anemia (hemoglobin as low as 1.9 mmol/l).
  • The devices provided readings despite critically low hemoglobin levels.
  • Observed discrepancies in readings between the two devices in the same patient.

Findings:

  • Pulse oximetry is feasible for estimating oxygen saturation even in cases of extreme anemia.
  • Discrepant readings between different pulse oximeter models were noted in anemic patients.
  • High oxygen saturation values obtained via pulse oximetry in severe anemia may correlate with actual arterial oxygen saturation.

Implications:

  • The study highlights the potential utility of pulse oximetry in managing patients with severe anemia.
  • Findings suggest a need for awareness regarding device variability and potential inaccuracies in extreme anemia.
  • Further research is warranted to validate pulse oximetry performance across various degrees of anemia.

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