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Related Concept Videos

Pulse Oximetry01:24

Pulse Oximetry

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...
Guidelines For Measuring Vital Signs01:19

Guidelines For Measuring Vital Signs

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.
Pulse rhythm01:30

Pulse rhythm

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 muscle...
Special considerations while measuring oxygen saturation01:19

Special considerations while measuring oxygen saturation

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 important. 
Holter Monitor: 24-Hour Monitoring01:23

Holter Monitor: 24-Hour Monitoring

Holter monitoring is a continuous electrocardiography (ECG) recording that tracks the heart's electrical activity over an extended period, generally 24 to 48 hours. This noninvasive diagnostic tool detects irregular heart rhythms that may not be captured during a standard ECG performed in a clinical setting.DeviceThe Holter monitor is a portable, small device connected to several electrodes on the patient's chest. These electrodes detect the heart's electrical signals and transmit them to the...
Equipments Used To Measure Blood Pressure01:30

Equipments Used To Measure Blood Pressure

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: Jun 6, 2026

Non-Invasive Monitoring of Microvascular Oxygenation and Reactive Hyperemia using Hybrid, Near-Infrared Diffuse Optical Spectroscopy for Critical Care
14:28

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Published on: May 10, 2024

New ear sensor for mobile, continuous and long term pulse oximetry.

Johannes P Buschmann1, Jin Huang

  • 1Munich University of Technology 80333, Germany. jbuschmann@blm-research.de

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|November 25, 2010
PubMed
Summary

A new ear canal sensor enables mobile pulse oximetry, overcoming motion artifacts that limit current finger-based monitoring. This innovation enhances patient mobility during vital sign measurements.

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Area of Science:

  • Biomedical Engineering
  • Medical Devices
  • Physiological Monitoring

Background:

  • Pulse oximetry is crucial for monitoring oxygen saturation but is typically limited to immobile patients.
  • Current pulse oximetry sensors, especially finger-based ones, are prone to motion artifacts, compromising signal quality and limiting mobility.
  • Developing a sensor for a more mobile application is essential for continuous patient monitoring.

Purpose of the Study:

  • To develop a novel pulse oximetry sensor suitable for mobile applications.
  • To address the limitations of existing sensors concerning user mobility and motion artifacts.
  • To investigate the feasibility of using an ear canal sensor for pulse oximetry.

Main Methods:

  • Development of a novel ear canal sensor for pulse oximetry.
  • Evaluation of sensor performance, focusing on signal quality and motion artifact reduction.
  • Comparison with traditional finger-based sensors.

Main Results:

  • The ear canal sensor demonstrated potential for mobile pulse oximetry.
  • The ear canal location was chosen to minimize unpleasant sensations from head movements.
  • The developed sensor aims to overcome the susceptibility of finger sensors to motion artifacts.

Conclusions:

  • An ear canal sensor offers a promising solution for enabling mobility in pulse oximetry monitoring.
  • This innovation could expand the use of pulse oximetry in ambulatory and active patient populations.
  • Further research is needed to fully validate the clinical utility of ear canal pulse oximetry.