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Related Concept Videos

Pulse Oximetry01:24

Pulse Oximetry

403
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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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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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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Pulse rhythm01:30

Pulse rhythm

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Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
918
Pulse Assessment Sites01:11

Pulse Assessment Sites

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Pulse assessment sites are crucial in evaluating a patient's cardiovascular health. By assessing the pulsations of arteries at specific anatomical locations, healthcare professionals can gather valuable information about blood flow, heart rate, and peripheral circulation. Understanding these pulse assessment sites is essential for conducting comprehensive cardiovascular evaluations and monitoring patients' overall health. These sites are strategically chosen due to the accessibility and...
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Equipments Used To Measure Blood Pressure01:30

Equipments Used To Measure Blood Pressure

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Direct Method
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
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Related Experiment Video

Updated: Sep 5, 2025

Non-Invasive Monitoring of Microvascular Oxygenation and Reactive Hyperemia using Hybrid, Near-Infrared Diffuse Optical Spectroscopy for Critical Care
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Automated Remote Pulse Oximetry System (ARPOS).

Pireh Pirzada1, David Morrison1, Gayle Doherty2

  • 1School of Computer Science, University of St Andrews, St Andrews KY16 9AJ, UK.

Sensors (Basel, Switzerland)
|July 9, 2022
PubMed
Summary
This summary is machine-generated.

This study developed a novel, non-contact system using camera technology to measure heart rate (HR) and oxygen saturation (SPO2). The system shows promise for remote patient monitoring in healthcare settings.

Keywords:
blood oxygenation level measurementheart rate measurementrPPG systemremote health monitoring

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Area of Science:

  • Biomedical Engineering
  • Medical Technology
  • Remote Sensing

Background:

  • Current heart rate (HR) and oxygen saturation (SPO2) measurements require physical contact and can be invasive.
  • Non-contact, non-invasive technologies for continuous HR and SPO2 monitoring are not widely available for healthcare.
  • Previous studies have not assessed camera-based systems for HR/SPO2 in real-world, at-home settings across diverse demographics.

Purpose of the Study:

  • To develop and evaluate a novel system for measuring HR and SPO2 using commercial off-the-shelf camera technology.
  • To assess the system's performance in real-life scenarios with participants in their homes.
  • To explore the utility of RGB and IR camera data for remote photoplethysmography.

Main Methods:

  • Developed a system utilizing RGB and IR camera data to measure HR and SPO2.
  • Pre-processed facial regions (forehead, lips, cheeks) using color, IR, and depth data.
  • Employed Fast Fourier Transform (FFT), radiometric measurements, and FastICA signal processing techniques.

Main Results:

  • Achieved a Root Mean Square Error (RMSE) of 7.8 for HR with an r-correlation of 0.85.
  • Obtained an RMSE of 2.3 for SPO2.
  • Optimized signal processing via detrending, interpolating, hamming, and normalizing with FastICA.

Conclusions:

  • The developed camera-based system accurately measures HR and SPO2 non-invasively.
  • This technology has potential applications in critical care, including hospitals and care homes.
  • The system could enable timely clinical interventions through remote patient monitoring.