The human ear canal: investigation of its suitability for monitoring photoplethysmographs and arterial oxygen saturation.

@article{Budidha2014TheHE,
  title={The human ear canal: investigation of its suitability for monitoring photoplethysmographs and arterial oxygen saturation.},
  author={Karthik Budidha and Panayiotis A. Kyriacou},
  journal={Physiological measurement},
  year={2014},
  volume={35 2},
  pages={
          111-28
        }
}
For the last two decades, pulse oximetry has been used as a standard procedure for monitoring arterial oxygen saturation (SpO2). However, SpO2 measurements made from extremities such as the finger, ear lobe and toes become susceptible to inaccuracies when peripheral perfusion is compromised. To overcome these limitations, the external auditory canal has been proposed as an alternative monitoring site for estimating SpO2, on the hypothesis that this central site will be better perfused… CONTINUE READING

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