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Related Concept Videos

Pulse01:16

Pulse

2.1K
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...
2.1K
Pulse01:05

Pulse

3.8K
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...
3.8K
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
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...
1.4K
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...
1.4K

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Related Experiment Video

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Video-oculography in Mice
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Video-oculography in Mice

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Full video pulse extraction.

Wenjin Wang1, Albertus C den Brinker2, Gerard de Haan1,2

  • 1Electronic Systems Group, Department of Electrical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands.

Biomedical Optics Express
|October 20, 2018
PubMed
Summary

This study presents a novel method for automated heart-rate detection using remote photoplethysmography (rPPG). The full video pulse extraction (FVP) system bypasses traditional region tracking for continuous vital sign monitoring.

Keywords:
(170.3880) Medical and biological imaging(280.0280) Remote sensing and sensors

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Area of Science:

  • Biomedical Engineering
  • Computer Vision
  • Physiological Monitoring

Background:

  • Remote photoplethysmography (rPPG) is a non-contact method for extracting physiological signals from video.
  • Existing rPPG methods often rely on region of interest (RoI) detection and tracking, which can be sensitive to motion and require initialization.
  • Automated and robust vital sign monitoring is crucial for various healthcare applications, including long-term patient observation.

Purpose of the Study:

  • To introduce a new automated heart-rate detection method using rPPG that does not require RoI detection or initialization.
  • To develop a system capable of direct pulse extraction from raw video streams.
  • To demonstrate the efficacy of the proposed method for long-term monitoring of vital signs in diverse populations.

Main Methods:

  • A novel approach combining parallel candidate pulse-signals, each biased towards differently colored objects.
  • Leveraging the temporal stability of averaged object colors (skin and background) in video scenes.
  • Development of the full video pulse extraction (FVP) system for direct processing of raw video streams.

Main Results:

  • The FVP system enables direct pulse extraction from raw video without RoI tracking or initialization.
  • Demonstrated effectiveness in long-term sleep monitoring using visible light and infrared video.
  • Successful application for both adult and neonatal heart-rate monitoring across diverse video datasets.

Conclusions:

  • The FVP method offers a robust and automated solution for heart-rate monitoring via rPPG.
  • The system's ability to process raw video streams simplifies deployment in various monitoring scenarios.
  • The approach holds potential for adaptation to monitor a wider range of vital signs, advancing video health monitoring.