ISSN 2398-2985      

Anesthesia: monitoring - pulse oximetry

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Synonym(s): Hemoglobin saturation


Introduction

  • Pulse oximetry measures effective oxygenation of the blood by measuring oxygen saturation of hemoglobin (SpO2). It also measures heart rate.
  • The principle consists of measuring the light absorption characteristics of hemoglobin passing between the pulse oximeter probes (clamps).
  • Simple and non-invasive.
  • Normal SpO2 values should be no less than 96%.
  • While SaO2 (direct measurement of blood gases) is a better way to monitor oxygenation and detects changes more rapidly, SpO2 (pulse oximetry) correlates decently when oxygenation is above 85%, and particularly when it is between 90% and 100%. However, SpO2 is always higher than SaO2. 

Use

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Further Reading

Publications

Refereed Papers

  • Recent references from PubMed and VetMedResource.
  • Olin J M, Smith T J & Talcott M R (1997) Evaluation of noninvasive techniques in domestic ferrets (Mustela putorius furo). Am J Vet Res 58 (10), 1065-1069 PubMed.

Other sources of information

  • Ozeki L & Caulkett N (2014) Monitoring. In: Zoo Animal and Wildlife Immobilization and Anesthesia. 2nd edn. Eds: West G, Heard D & Caulkett N. Wiley Blackwell, USA. pp 43-51.

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