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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.
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. 
Special considerations while measuring pulse01:13

Special considerations while measuring pulse

Assessing a patient's pulse is a fundamental skill in healthcare, but certain situations require special attention:
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...
Assessment of radial pulse01:11

Assessment of radial pulse

Assessment of Radial Pulse
The radial pulse, located at the wrist, is often the preferred site for assessing peripheral pulse because of its accessibility and dependability. The process of determining the radial pulse involves several steps:

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Related Experiment Video

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Non-Invasive Monitoring of Microvascular Oxygenation and Reactive Hyperemia using Hybrid, Near-Infrared Diffuse Optical Spectroscopy for Critical Care
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Development of a standardized method for motion testing in pulse oximeters.

Allan B Shang1, Raymond T Kozikowski, Andrew W Winslow

  • 1From the *Department of Anesthesiology, Duke University Medical Center; †The Fitzpatrick Institute for Photonics, Duke University; ‡Department of Electrical and Computer Engineering, Duke University, Durham, North Carolina; and §The Center for Devices and Radiological Health, United States Food and Drug Administration, Silver Spring, MO.

Anesthesia and Analgesia
|December 6, 2007
PubMed
Summary

Developing a novel feedback loop system to test pulse oximeter motion artifact rejection shows promise. This active motion testing method aims for standardized, reproducible evaluations of device performance in real-world conditions.

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Area of Science:

  • Biomedical Engineering
  • Medical Device Technology
  • Physiological Monitoring

Background:

  • Pulse oximeter performance during motion varies due to device differences and inconsistent motion characterization.
  • Current motion testing uses passive mechanical motion, which doesn't reflect active physiological changes during movement.
  • Lack of standardized motion testing hinders reliable assessment of pulse oximeter artifact rejection.

Purpose of the Study:

  • To propose and evaluate a novel feedback control loop system for testing pulse oximeter performance under motion.
  • To develop a reproducible and actively controlled motion test for standardized manufacturer evaluations.
  • To create a sensitive method for distinguishing pulse oximeters capable of rejecting motion artifact.

Main Methods:

  • A feedback control loop was designed to link the pulse oximeter device and the test subject.
  • This system generates reproducible, actively controlled motion based on the oximeter's signal perspective.
  • Clinical protocols and necessary tools were developed for feasibility demonstration.

Main Results:

  • Preliminary work focused on establishing the necessary tools and clinical protocols.
  • Initial observations were made, but a lack of sufficient experienced subjects prevented definitive conclusions.
  • The feasibility of the novel testing approach is under investigation.

Conclusions:

  • A novel method for testing pulse oximeter motion artifact rejection has been established.
  • This approach sets the stage for a feasibility demonstration of active motion testing.
  • Further studies with adequate subjects and statistical analysis are needed to validate this robust test method.