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Related Concept Videos

Pulse Oximetry01:24

Pulse Oximetry

1.4K
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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Pulse01:16

Pulse

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When the heart pumps blood out, arterial elastic fibers play a crucial role in sustaining a high-pressure gradient. They expand to accommodate the received blood and then recoil - a process known as the pulse that can be either manually palpated or electronically quantified. Despite a reduction in its effect with increased distance from the heart, elements of the pulse's systolic and diastolic components persist, observable even at the arteriole level.
The pulse serves as a clinical...
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Pulse01:05

Pulse

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The pulse is one of the most fundamental physiological indicators of the body's cardiovascular health. It is the rhythmic expansion and contraction of the arterial walls in response to the pressure generated by the heart's pumping action.
Pulse Rate and its Significance
Pulse rate, often measured in beats per minute (bpm), reflects the heart rate (HR), which is influenced by numerous factors such as stress, physical activity, and hormonal changes. A normal resting adult pulse rate falls...
4.0K
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

1.8K
A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
1.8K
Regulation of Pulse01:20

Regulation of Pulse

2.3K
Pulse regulation involves physiological mechanisms that ensure adequate blood flow throughout the body. The heartbeat, regulated by the autonomic nervous system, is influenced by hormonal balance, physical activity, and emotional state.
2.3K
Pulse rhythm01:30

Pulse rhythm

1.4K
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...
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Transcranial Pulse Stimulation for Alzheimer's Patients
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Kittredge Lecture: Pulse Oximetry Facts and Fallacies.

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  • 1Dr. Lipnick is affiliated with Department of Anesthesia and Perioperative Medicine, University of San Francisco (UCSF), San Francisco, California, USA.

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Summary

Pulse oximeters are vital clinical tools, but awareness of their limitations, like performance disparities across skin tones, is crucial. Understanding these factors ensures better patient safety and outcomes.

Keywords:
device standardshealth disparitiesmonitoringpulse oximetry

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Area of Science:

  • Clinical Engineering
  • Biomedical Devices
  • Medical Technology

Background:

  • Pulse oximeters are indispensable clinical tools used for decades in diverse healthcare settings.
  • Despite widespread use, clinicians may lack awareness of pulse oximetry limitations and optimization strategies.
  • Global disparities in access to quality pulse oximeters and oxygen persist.

Purpose of the Study:

  • To highlight the limitations of pulse oximetry technology.
  • To address recent concerns regarding disparate performance and health disparities related to skin color.
  • To inform clinicians and researchers about strengths and limitations for optimal implementation.

Main Methods:

  • Review of existing clinical data on pulse oximeter performance.
  • Analysis of health disparities linked to pulse oximetry accuracy.
  • Examination of regulatory frameworks and technological advancements.

Main Results:

  • Pulse oximetry performance can vary, particularly across different skin tones, raising concerns about health equity.
  • Access to reliable pulse oximeters remains a significant challenge in certain global regions.
  • Decades-old concerns about pulse oximetry accuracy are being re-examined due to new data and regulatory changes.

Conclusions:

  • Clinicians and researchers must understand pulse oximetry's strengths and weaknesses.
  • Addressing performance disparities and improving access are critical for patient safety.
  • Familiarization with oximetry limitations is essential for optimal clinical decision-making and improved patient outcomes.