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Special considerations while measuring oxygen saturation01:19

Special considerations while measuring oxygen saturation

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Assessing respiratory rate concurrently with pulse measurement is fundamental to patient care, providing valuable insights into the patient's respiratory function. The normal breathing rate for an adult usually falls within a normal range of 12 to 20 breaths per minute. Abnormal respiratory rates can signal underlying health conditions or the need for immediate intervention.
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Related Experiment Video

Updated: Dec 15, 2025

Fabrication and Operation of an Oxygen Insert for Adherent Cellular Cultures
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Development of a Patch-Type Flexible Oxygen Partial Pressure Sensor.

Yuta Katayama1, Yuta Fujioka1, Kosuke Tsukada1,2

  • 1Graduate School of Fundamental Science and TechnologyKeio UniversityYokohama223-8522Japan.

IEEE Journal of Translational Engineering in Health and Medicine
|July 9, 2020
PubMed
Summary

Researchers developed a novel flexible oxygen sensor to directly measure oxygen partial pressure on body surfaces. This patch-type device overcomes oximetry limitations, enabling accurate measurements on irregular tissues and organs.

Keywords:
Oxygen sensorphosphorescencepoint-of-care testingwearable

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Medical Devices

Background:

  • Oxygen concentration is a critical vital sign in emergency and bedside care.
  • Current oximetry methods have limitations, including restricted measurement sites and inability to measure absolute oxygen concentration.

Purpose of the Study:

  • To develop a novel oxygen sensor capable of directly measuring oxygen partial pressure ([Formula: see text]) on body and organ surfaces.
  • To overcome the limitations of existing oximetry techniques.

Main Methods:

  • Fabrication of a flexible oxygen sensor using a dimethylpolysiloxane substrate with embedded light emitting diode (LED) and photodiode (PD), incorporating carbon nanotubes.
  • Evaluation of the sensor through calibration, bending strain tests, time and frequency response analysis, and in vivo assessments.

Main Results:

  • The fabricated oxygen sensor demonstrated high sensitivity during calibration.
  • Carbon nanotube electrodes exhibited sufficient bending resistance without compromising LED and PD performance.
  • In vivo assessments confirmed the sensor's ability to accurately measure [Formula: see text] on irregular and curved surfaces, with successful measurements on a rat liver surface.

Conclusions:

  • The developed patch-type flexible oxygen sensor accurately measures oxygen partial pressure on diverse body and organ surfaces.
  • The sensor's design, incorporating carbon nanotubes, ensures durability and maintains measurement accuracy.
  • This technology offers a promising solution for non-invasive oxygen monitoring in challenging medical settings.