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Related Concept Videos

Assessment of the Cardiovascular System III: Palpation01:27

Assessment of the Cardiovascular System III: Palpation

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Palpation involves feeling the body to evaluate texture, size, consistency, and tenderness for assessing cardiovascular health. The following steps are organized in a head-to-toe order:
Jugular Venous Pressure (JVP) Measurement
Position the patient at a thirty- to forty-five-degree angle or in a semi-fowler's position. Look for the highest point of pulsation in the internal jugular vein and measure the vertical distance to the angle of Loius or sternal angle. A normal JVP is 3-4 cm above...
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Physical Assessment of the Respiratory Tract II: Palpation01:24

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Physical assessment of the respiratory tract is critical in identifying potential health issues. One key component of this assessment is palpation, a technique healthcare providers use to assess the body for abnormalities. This content explores the method of palpation in evaluating the respiratory tract, focusing on thoracic palpation and tactile fremitus.
Thoracic Palpation
Thoracic palpation detects tenderness, masses, lesions, respiratory excursions, and vocal fremitus. The nurse assesses...
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Assessment of the Abdomen III: Palpation01:23

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Palpation is a crucial tactile examination method for assessing abdominal organs and detecting conditions like tenderness, distention, masses, or fluid. It involves both light and deep palpation techniques, each serving specific diagnostic purposes. Light palpation helps identify tenderness and other surface-level indicators, while deep palpation locates and assess abdominal masses and organ boundaries. A skilled professional can gather valuable insights through palpation, including evaluating...
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Magnetic Resonance Imaging01:24

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Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
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Cardiovascular System Abnormal Findings I: Inspection and Palpation01:29

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In a cardiovascular examination, inspection and palpation are crucial for identifying abnormalities.
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Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...
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Related Experiment Videos

Brain palpation from physiological vibrations using MRI.

Ali Zorgani1, Rémi Souchon1, Au-Hoang Dinh1

  • 1Inserm, U1032, LabTau, Lyon, F-69003, France; Université Lyon 1, Lyon, F-69003, France;

Proceedings of the National Academy of Sciences of the United States of America
|October 7, 2015
PubMed
Summary

This study introduces a passive, noise-based magnetic resonance elastography (MRE) technique to measure tissue elasticity using natural body motion. This novel approach offers broadband, synchronized-free characterization for potential brain anomaly detection.

Keywords:
braincorrelationelastography

Related Experiment Videos

Area of Science:

  • Biophysics
  • Medical Imaging
  • Biomaterials

Background:

  • Magnetic Resonance Elastography (MRE) typically requires active mechanical drivers and synchronization.
  • Characterizing tissue elasticity is crucial for diagnosing various medical conditions.
  • Natural physiological processes generate subtle shear waves within tissues.

Purpose of the Study:

  • To develop a passive, noise-based MRE technique for tissue elasticity assessment.
  • To leverage naturally occurring shear waves in living tissues for MRE.
  • To explore a novel "brain palpation" method for non-invasive brain characterization.

Main Methods:

  • Inspired by seismic noise correlation and time reversal principles.
  • Extracting elasticity from ambient shear waves generated by cardiac motion, blood pulsatility, and muscle activity.
  • Experimental validation in a calibrated phantom and in vivo in healthy human brains.

Main Results:

  • Demonstrated feasibility of passive MRE in a phantom.
  • Successfully acquired in vivo MRE data from the human brain without external synchronization.
  • Showcased the broadband and passive nature of the noise-based approach.

Conclusions:

  • The developed passive MRE technique is a viable alternative to active MRE methods.
  • This approach holds promise for non-invasive, "brain palpation" for disease detection.
  • Further research can explore its application in characterizing brain anomalies and diseases.