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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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The force applied by fluids against a surface, known as hydrostatic pressure, initiates the transfer of fluid among different compartments. Within our blood vessels, the blood's hydrostatic pressure is a result of the heart's pumping action. At the arteriolar end of capillaries, hydrostatic pressure (capillary blood pressure) exceeds the opposing colloid osmotic pressure created primarily by plasma proteins like albumin. This discrepancy in pressure propels plasma and nutrients from the...
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Updated: May 7, 2025

Meso-Scale Particle Image Velocimetry Studies of Neurovascular Flows In Vitro
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Guyton's hemodynamic mosaic: crafting fluid management with precision.

Rogerio Da Hora Passos1, Luciano Ribeiro Pereira Silva2, Leonardo Van De Wiel Barros Urbano Andari2

  • 1Intensive Care Department, Hospital Israelita Albert Einstein, Av. Albert Einstein, 627/701 - Morumbi, São Paulo, CEP: 05651-901, SP, Brasil. oiregorpassos@yahoo.com.br.

Annals of Intensive Care
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Summary

Arthur Guyton

Area of Science:

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Background:

  • Arthur Guyton's principles offer a framework for understanding cardiovascular dynamics.

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  • Clinical fluid management in critically ill patients remains complex.
  • Right atrial pressure (RAP) is traditionally used to assess cardiac output.