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Related Concept Videos

Characteristics of Fluids01:20

Characteristics of Fluids

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When a force is applied parallel to the top surface of a solid, it resists the applied force due to the internal frictional forces between the layers of the solid known as shearing resistance. However, when the force is removed, the shearing forces restore the original shape of the solid. Other deformation forces also cause temporary changes in shape if the forces are not beyond a threshold magnitude. Solids tend to retain their shape, making the study of their rest and motion easier. Beyond...
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Characteristics of Fluids01:31

Characteristics of Fluids

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Fluids differ from solids primarily in their molecular structure and stress response. Solids have tightly packed molecules with strong intermolecular forces, maintaining their shape and resisting deformation. In contrast, fluids have molecules spaced farther apart with weaker forces, allowing them to flow and deform easily.
Fluids, which include both liquids and gases, are substances that deform continuously under shearing stress. For example, water and oil are liquids with molecules that can...
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Laminar Flow01:27

Laminar Flow

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Laminar flow represents a smooth, orderly fluid motion where particles move along parallel paths, resulting in minimal mixing between layers. Streamlined particle paths characterize this flow regime and occur under conditions where viscous forces dominate over inertial forces. The distinction between laminar, transitional, and turbulent flow is primarily determined by the Reynolds number, a dimensionless quantity calculated as:
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Fluid Pressure01:14

Fluid Pressure

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In mechanical engineering, fluid pressure plays a critical role in designing systems that utilize liquid flow, such as hydraulic systems, pumps, and valves. When designing these systems, engineers must ensure they can withstand the forces created by fluid pressure to avoid damage or failure.
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Types of Fluids01:27

Types of Fluids

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Fluids can be classified into Newtonian and non-Newtonian fluids based on their response to shear stress. Newtonian fluids have a linear relationship between shear stress and the shear strain rate, following Newton's law of viscosity. Their viscosity remains constant regardless of the shear rate, making their behavior predictable and easier to analyze. Common examples include water, air, oil, and gasoline.
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Steady Flow of a Fluid Stream01:27

Steady Flow of a Fluid Stream

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Consider a control volume, such as a pipe with solid boundaries, through which fluid flows and changes direction due to the impulse exerted by the resulting force from the pipe walls. In steady flow, the mass of fluid entering the control volume at a given time, t, with velocity v1, is equal to the mass leaving after infinitesimal time dt, with velocity v2.
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High Speed Droplet-based Delivery System for Passive Pumping in Microfluidic Devices
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Principles of Fluid Management.

Oleksa Rewa1, Sean M Bagshaw1

  • 1Division of Critical Care Medicine, Faculty of Medicine and Dentistry, University of Alberta, 8440-112 Street Northwest, Edmonton, Alberta T6G 2B7, Canada.

Critical Care Clinics
|September 28, 2015
PubMed
Summary
This summary is machine-generated.

Optimal fluid therapy is crucial for acutely ill patients. Inappropriate administration can cause harm, necessitating careful prescription, monitoring, and timely fluid removal when appropriate.

Keywords:
ColloidCrystalloidFluid balanceIntravenousResuscitationToxicity

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Area of Science:

  • Critical Care Medicine
  • Hospital Medicine
  • Patient Safety

Background:

  • Fluid therapy is a ubiquitous intervention for acutely ill hospitalized patients.
  • Despite its common use, optimal fluid therapy strategies remain incompletely defined.
  • Inappropriate fluid administration poses risks and can lead to adverse patient outcomes.

Purpose of the Study:

  • To highlight the critical need for individualized and context-specific fluid therapy.
  • To emphasize the importance of precise prescription, including type, dose, and rate.
  • To underscore the potential for quantitative toxicity and the necessity of vigilant monitoring and fluid management.

Main Methods:

  • This study is a review and expert opinion piece.
  • It synthesizes current understanding of fluid therapy principles and risks.
  • It advocates for enhanced clinical attention to fluid management practices.

Main Results:

  • Inappropriate fluid therapy can significantly contribute to patient harm and worse outcomes.
  • Quantitative toxicity of fluid therapy is a recognized concern.
  • Effective fluid management requires careful prescription, monitoring of fluid balance, and prevention of fluid overload.

Conclusions:

  • Fluid therapy prescription must be tailored to individual patients and clinical contexts.
  • Close attention to fluid balance, potential complications, and timely deresuscitation is essential.
  • Optimizing fluid therapy is key to improving patient safety and outcomes in acute care settings.