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Related Concept Videos

Pulse Oximetry01:24

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Pulse oximetry, or SpO2, is a non-invasive method for continuously monitoring arterial oxygen saturation (SaO2). This procedure involves attaching a probe or sensor to the patient's fingertip, forehead, earlobe, or nose bridge. The sensor works by detecting changes in oxygen saturation levels through light signals generated by the oximeter and reflected by the pulsing blood under the probe.
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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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Following these guidelines can help nurses accurately measure vital signs, assess changes in patient conditions, and provide timely treatment when necessary. Adhering closely to the guidelines ensures the accuracy and reliability of the results.
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Amperometry is a technique commonly used to measure the concentration of specific analytes in a solution by monitoring the electric current generated during an electrochemical reaction. It involves applying a constant potential between a working electrode and a reference electrode to measure the resulting current, which is proportional to the concentration of the analyte. The Clark oxygen electrode operates based on this principle of amperometry. It consists of a cathode and an anode enclosed...
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Related Experiment Video

Updated: Nov 6, 2025

Tumor Hypoxia Assessment: In Vivo 3D Oxygen Imaging Through Electron Paramagnetic Resonance
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Oxygen-Sensing Paramagnetic Probes for Clinical Oximetry.

M M Kmiec1, D Tse1, Periannan Kuppusamy2

  • 1Department of Radiology, Geisel School of Medicine at Dartmouth, Hanover, NH, USA.

Advances in Experimental Medicine and Biology
|May 9, 2021
PubMed
Summary

Electron paramagnetic resonance (EPR) oximetry uses novel lithium naphthalocyanine crystals for direct tissue oxygen measurement. This technology offers promising clinical applications for monitoring partial pressure of oxygen (pO2).

Keywords:
Electron paramagnetic resonance (EPR)MicroChipOximetryOxyChipPartial pressure of oxygen (pO2)SPOTChip

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Area of Science:

  • Biomedical Engineering
  • Medical Physics
  • Materials Science

Background:

  • Accurate tissue oxygen monitoring is crucial for clinical diagnostics and treatment.
  • Current methods for measuring partial pressure of oxygen (pO2) have limitations in direct tissue application.
  • Electron paramagnetic resonance (EPR) oximetry offers a non-invasive approach to oxygen sensing.

Purpose of the Study:

  • To summarize the development and application of lithium naphthalocyanine crystals for EPR oximetry.
  • To highlight the potential of these sensors for direct tissue oxygen measurement in clinical settings.
  • To present the applicability of EPR oximetry for assessing tissue pO2.

Main Methods:

  • Utilizing lithium naphthalocyanine paramagnetic crystals as oxygen sensors.
  • Embedding these crystals in a biocompatible siloxane elastomer for topical or implantable forms.
  • Employing Electron Paramagnetic Resonance (EPR) spectroscopy for oximetry measurements.

Main Results:

  • Demonstrated the capability of lithium naphthalocyanine crystals to act as effective oxygen sensors.
  • Showcased the successful integration of these sensors into biocompatible materials for tissue application.
  • Validated the potential for direct measurement of partial pressure of oxygen (pO2) in tissues using EPR oximetry.

Conclusions:

  • Lithium naphthalocyanine-based EPR oximetry provides a direct method for tissue oxygen measurement.
  • These sensors are applicable in both topical and implantable forms for clinical use.
  • EPR oximetry holds significant promise for advancing the assessment of tissue oxygenation.