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Related Concept Videos

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 amplitude and quality01:17

Pulse amplitude and quality

Pulse amplitude is a crucial indicator of cardiac health because it provides valuable insights into the strength of left ventricular contractions and the overall uniformity of blood circulation within the vasculature. The strength of the pulse is directly related to the force with which the heart contracts and the volume of blood being pumped.
A weak or absent pulse may indicate reduced cardiac output or poor left ventricular contraction, which can be signs of cardiovascular dysfunction or...
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...
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

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.
Pulse Assessment Sites01:11

Pulse Assessment Sites

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...
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...

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Related Experiment Video

Updated: Jul 3, 2026

Developing a Behavioral Box for Assessing Prepulse Inhibition and Neural Activity in Psychiatric Animal Models
06:55

Developing a Behavioral Box for Assessing Prepulse Inhibition and Neural Activity in Psychiatric Animal Models

Published on: July 22, 2025

Pulse onset detection using neighbor pulse-based signal enhancement.

Peng Xu1, Marvin Bergsneider, Xiao Hu

  • 1Neural Systems and Dynamics Laboratory, Department of Neurosurgery, The David Geffen School of Medicine, University of California, Los Angeles, United States.

Medical Engineering & Physics
|July 18, 2008
PubMed
Summary

This study introduces a new algorithm to improve the detection of pulse wave onsets in noisy clinical signals. The method enhances accuracy for cardiovascular pulse wave analysis, crucial for pulse wave velocity measurements.

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Area of Science:

  • Biomedical Engineering
  • Cardiovascular Physiology
  • Signal Processing

Background:

  • Accurate pulse wave onset detection is vital for pulse wave velocity analysis.
  • Clinical signals often contain noise and artifacts, complicating precise onset detection.
  • Existing methods struggle with contaminated pulsatile signals in real-world environments.

Purpose of the Study:

  • To propose and validate a novel neighbor pulse-based signal enhancement algorithm.
  • To reduce errors in pulse onset detection for noise-contaminated pulsatile signals.
  • To improve the robustness of pulse wave analysis in clinical settings.

Main Methods:

  • Developed a signal enhancement algorithm utilizing the first principal component from three adjacent pulses.
  • Employed test signals mixing arterial blood pressure, cerebral blood flow velocity, and intracranial pressure pulses.
  • Introduced varying levels of white noise to simulate clinical environments.

Main Results:

  • The proposed algorithm significantly improved pulse onset detection (p<0.05) across all tested onset definitions.
  • Enhancement was consistent across arterial blood pressure, cerebral blood flow velocity, and intracranial pressure signals.
  • Demonstrated superior performance compared to methods without the pulse enhancement algorithm.

Conclusions:

  • The neighbor pulse-based algorithm effectively enhances the accuracy of pulse onset detection.
  • This method offers robustness against noise and artifacts in clinical pulsatile signals.
  • Facilitates more reliable pulse wave analysis, particularly for pulse wave velocity measurements.