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Related Concept Videos

Guidelines For Measuring Vital Signs01:19

Guidelines For Measuring Vital Signs

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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.
Before taking a patient's vital signs, a nurse would consider and assess the patient's comfort level and ensure appropriate equipment is available.
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Pulse Oximetry01:24

Pulse Oximetry

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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.
Purpose
Average SpO2 values are greater than 95%. If the readings fall below 90%, it indicates that...
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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.
Ensuring accuracy in vital sign recordings while prioritizing patient comfort and minimizing anxiety is...
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Assessment of Diffusion and Perfusion01:17

Assessment of Diffusion and Perfusion

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Understanding and evaluating diffusion and perfusion is critical in assessing a patient's respiratory and circulatory health. These processes play key roles in maintaining the body's internal environment, ensuring that tissues receive adequate oxygen while waste products are efficiently removed.
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Updated: Jul 8, 2025

Non-Invasive Monitoring of Microvascular Oxygenation and Reactive Hyperemia using Hybrid, Near-Infrared Diffuse Optical Spectroscopy for Critical Care
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Non-Contact Measurement of Blood Oxygen Saturation Using Facial Video Without Reference Values.

Soma Sasaki1, Norihiro Sugita1,2, Takanori Terai1

  • 1Graduate School of EngineeringTohoku University Sendai 9808579 Japan.

IEEE Journal of Translational Engineering in Health and Medicine
|December 13, 2023
PubMed
Summary

This study introduces a novel contactless method for measuring percutaneous oxygen saturation (SpO2). The technique accurately determines SpO2 levels without needing reference values or skin contact, addressing limitations of traditional pulse oximeters.

Keywords:
Facial video imagemultispectral camerapercutaneous oxygen saturationprincipal component analysisvideo plethysmography

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Area of Science:

  • Biomedical Engineering
  • Medical Devices
  • Physiological Monitoring

Background:

  • Continuous percutaneous oxygen saturation (SpO2) monitoring is crucial for early detection of hypoxemia and patient management.
  • Traditional pulse oximeters require skin contact, posing risks like inflammation and discomfort, especially for neonates or sensitive skin.
  • The demand for contactless SpO2 measurement has increased, particularly post-COVID-19, due to limitations of contact-based devices.

Purpose of the Study:

  • To develop and validate a novel contactless technique for measuring SpO2.
  • To overcome the limitations of existing contactless methods that rely on reference values from pulse oximeters.
  • To provide an accurate and non-invasive SpO2 measurement solution without requiring skin contact.

Main Methods:

  • Utilized video imaging with different light wavelengths to capture subcutaneous tissue information.
  • Developed algorithms to reduce the influence of non-pulsating components in the video signals.
  • Investigated the use of varying light wavelengths for differential light penetration depths.
  • Experimentally validated the accuracy of the proposed contactless SpO2 measurement technique.

Main Results:

  • The proposed contactless method demonstrated higher accuracy compared to conventional methods.
  • The technique successfully measured SpO2 without requiring reference values from contact-type pulse oximeters.
  • Experimental results confirmed the efficacy of reducing non-pulsating components and utilizing differential light wavelengths.

Conclusions:

  • The novel contactless SpO2 measurement technique offers a promising alternative to traditional pulse oximetry.
  • This method eliminates the need for skin contact and reference values, enhancing patient comfort and usability.
  • The findings support the potential of video-based SpO2 monitoring for widespread clinical and home use.