Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Measurement of Fluid Pressure01:16

Measurement of Fluid Pressure

506
Fluid pressure is commonly measured using devices called manometers, which rely on liquid columns to indicate pressure differences. The height of a liquid column in a manometer reflects the pressure exerted by the fluid, providing a simple yet effective means of measurement. Different types of manometers serve specific purposes based on their configurations and the type of fluids involved.
A basic form of manometer is the piezometer, a vertical tube open at the top and filled with the same...
506
Characteristics of Fluids01:20

Characteristics of Fluids

7.4K
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...
7.4K
Characteristics of Fluids01:31

Characteristics of Fluids

880
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...
880
Rapidly Varying Flow01:24

Rapidly Varying Flow

339
Rapidly varying flow (RVF) in open channels is characterized by abrupt changes in flow depth over a short distance, with the rate of depth change relative to distance often approaching unity. These flows are inherently complex due to their transient and multi-dimensional nature, making exact analysis difficult. However, approximate solutions using simplified models provide valuable insights into their behavior.Key Features of Rapidly Varying FlowRVF is commonly observed in scenarios involving...
339
Pressure Variation in a Fluid at Rest01:11

Pressure Variation in a Fluid at Rest

665
In a fluid at rest, the pressure at any point beneath the fluid surface depends solely on the depth, not on the container's shape or size. This principle, known as hydrostatic pressure, arises because, in stationary fluids, there is no acceleration, meaning the forces within the fluid balance out. Only vertical forces, caused by the weight of the fluid above, contribute to pressure changes with depth.
When measuring pressure at two different levels within the fluid, the difference in...
665
Fluid Pressure01:14

Fluid Pressure

1.0K
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.
According to Pascal's law, a fluid at rest will generate equal pressure in all directions. This pressure is measured as a force per unit area, and its magnitude depends on the fluid's specific...
1.0K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

The role of hemoadsorption in septic shock: toward a personalized approach.

Critical care (London, England)·2026
Same author

Pulse Pressure Variation During Passive Leg Raising to Assess Preload Responsiveness: Influence of Inspiratory Effort During Pressure Support Ventilation.

Critical care medicine·2026
Same author

Physiological Basis of Formulas Estimating Central Systolic Pressure.

Critical care medicine·2026
Same author

Comparison between invasive radial and femoral arterial pressures and carotid tonometry in ICU patients: A physiological study.

Annals of intensive care·2026
Same author

Acute hemodynamic tests to determine the status of macro-to-microcirculatory coupling during septic shock resuscitation.

Critical care (London, England)·2026
Same author

Correction: Refractory septic shock new definition: a first stone to pave a long way.

Intensive care medicine·2026
Same journal

Cardiogenic shock - toward phenotype-directed, precision management.

Current opinion in critical care·2026
Same journal

The future of critical care nutrition: from calorie counting to precision personalized metabolism therapy.

Current opinion in critical care·2026
Same journal

Editorial introduction.

Current opinion in critical care·2026
Same journal

Generative artificial intelligence for outcome prediction in critical care: the future is now?

Current opinion in critical care·2026
Same journal

Feeding under support in critical care illness: metabolic and nutritional management during extracorporeal membrane oxygenation and continuous renal replacement therapy.

Current opinion in critical care·2026
Same journal

Multinational collaborations in critical care research: feasible and useful?

Current opinion in critical care·2026
See all related articles

Related Experiment Video

Updated: Dec 23, 2025

Continuous Venous-Arterial Doppler Ultrasound During a Preload Challenge
09:32

Continuous Venous-Arterial Doppler Ultrasound During a Preload Challenge

Published on: January 20, 2023

3.9K

Parameters of fluid responsiveness.

Rui Shi1,2, Xavier Monnet1,2, Jean-Louis Teboul1,2

  • 1Service de Médecine Intensive-Réanimation, Hôpital Bicêtre, AP-HP, Université Paris-Saclay, Le Kremlin-Bicêtre.

Current Opinion in Critical Care
|April 26, 2020
PubMed
Summary
This summary is machine-generated.

Dynamic indices reliably assess fluid responsiveness, guiding fluid administration. New noninvasive techniques and tests like the end-expiratory occlusion test show promise in clinical settings.

More Related Videos

Echocardiographic Assessment Using Subxiphoid-Only Examination for Hypotensive Patients
08:45

Echocardiographic Assessment Using Subxiphoid-Only Examination for Hypotensive Patients

Published on: April 18, 2025

1.0K
Ultrasound Assessment of Endothelial-Dependent Flow-Mediated Vasodilation of the Brachial Artery in Clinical Research
08:42

Ultrasound Assessment of Endothelial-Dependent Flow-Mediated Vasodilation of the Brachial Artery in Clinical Research

Published on: October 22, 2014

27.8K

Related Experiment Videos

Last Updated: Dec 23, 2025

Continuous Venous-Arterial Doppler Ultrasound During a Preload Challenge
09:32

Continuous Venous-Arterial Doppler Ultrasound During a Preload Challenge

Published on: January 20, 2023

3.9K
Echocardiographic Assessment Using Subxiphoid-Only Examination for Hypotensive Patients
08:45

Echocardiographic Assessment Using Subxiphoid-Only Examination for Hypotensive Patients

Published on: April 18, 2025

1.0K
Ultrasound Assessment of Endothelial-Dependent Flow-Mediated Vasodilation of the Brachial Artery in Clinical Research
08:42

Ultrasound Assessment of Endothelial-Dependent Flow-Mediated Vasodilation of the Brachial Artery in Clinical Research

Published on: October 22, 2014

27.8K

Area of Science:

  • Critical care medicine
  • Hemodynamics
  • Fluid management

Background:

  • Assessing fluid responsiveness is crucial for optimizing hemodynamic status in critically ill patients.
  • Traditional methods for fluid responsiveness assessment have limitations, necessitating novel approaches.

Purpose of the Study:

  • To review recent advances in dynamic indices for predicting fluid responsiveness.
  • To evaluate the reliability and feasibility of novel noninvasive techniques and heart-lung interaction tests.

Main Methods:

  • Literature review of recent studies on dynamic indices of fluid responsiveness.
  • Analysis of passive leg raising, pulse pressure variation, tidal volume challenge, end-expiratory occlusion test, and mini-fluid challenge.

Main Results:

  • Passive leg raising is reliable with real-time hemodynamic assessment but can be affected by intra-abdominal hypertension.
  • Tidal volume challenge and end-expiratory occlusion test show promising predictive performance for fluid responsiveness.
  • Pulse pressure and stroke volume variations have limitations, but new heart-lung interaction tests are emerging.

Conclusions:

  • Dynamic indices and novel monitoring techniques enhance the selection of fluid responders and prevent fluid overload.
  • Further research is needed to validate these methods in larger patient cohorts.