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Related Concept Videos

Bernoulli's Principle: Applications01:17

Bernoulli's Principle: Applications

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There are many devices and situations in which fluid flows at a constant height and so can be analyzed using Bernoulli's principle. These devices include, but are not limited to, entrainment devices and fluid flow measuring devices.
Entrainment devices use a high fluid speed to create low pressures and, thus, entrain one fluid into another. Some examples of these devices are given below:
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Mechanical Ventilation II: Invasive Ventilation01:23

Mechanical Ventilation II: Invasive Ventilation

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Ventilators are essential medical equipment used to aid patients with respiratory difficulties. Their primary function is to assist or replace spontaneous breathing by providing mechanical ventilation. There are two general classes of mechanical ventilators: negative-pressure and positive-pressure ventilators.
Negative-Pressure Ventilators
Negative-pressure ventilators create a vacuum around the chest or body to draw air into the lungs, simulating breathing. This method does not require an...
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Mechanical Ventilation I: Indication and Settings01:29

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Mechanical ventilation is a life-saving technique for managing acute respiratory failure and other respiratory complications. The process involves using a machine known as a ventilator to supply oxygen to the lungs and assist in removing carbon dioxide. It serves as a bridge to long-term mechanical ventilation or a temporary measure until ventilatory support is discontinued. The ventilator can maintain this function for a prolonged period, providing critical support for patients until they can...
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Oxygen Delivering System II: Venturi Mask and Transtracheal Oxygen01:16

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Mechanical Ventilation III: Noninvasive Ventilation01:23

Mechanical Ventilation III: Noninvasive Ventilation

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Noninvasive positive-pressure ventilation (NIPPV), continuous positive airway pressure (CPAP), and bilevel positive airway pressure (BiPAP) are essential methods in respiratory care. These ventilation techniques offer unique benefits for patients with various respiratory conditions, providing adequate support without requiring intubation. Let's explore how each method is crucial in improving patient outcomes and enhancing respiratory therapy.
Noninvasive Positive-Pressure Ventilation...
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Suctioning the Nasopharyngeal Airway01:29

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Nasopharyngeal suctioning is a procedure to remove secretions from the upper part of the respiratory tract that the patient cannot clear independently. It helps maintain airway patency and prevents complications such as aspiration pneumonia.
Equipment Required
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Related Experiment Video

Updated: Dec 20, 2025

Noninvasive Determination of Vortex Formation Time Using Transesophageal Echocardiography During Cardiac Surgery
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Potential application of using vortex ring for personalized ventilation.

Yi Wang1,2, Chao Zhai1,2, Zhixiang Cao1,2

  • 1State Key Laboratory of Green Building in Western China, Xi'an University of Architecture and Technology, Xi'an, China.

Indoor Air
|June 2, 2020
PubMed
Summary

A new vortex ring personalized ventilation system (VRPV) delivers fresh air efficiently. This system shows significantly higher fresh air ratios compared to traditional jets, offering potential for effective personalized ventilation.

Keywords:
air distributionfresh air ratioindoor air qualitypersonalized ventilationventilation efficiencyvortex ring

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Area of Science:

  • Mechanical Engineering
  • Environmental Engineering
  • Fluid Dynamics

Background:

  • Traditional ventilation systems struggle with efficient air distribution to individual occupants.
  • Personalized ventilation offers a targeted approach to improve indoor air quality and thermal comfort.
  • Vortex ring technology presents a novel method for controlled air delivery.

Purpose of the Study:

  • To introduce and experimentally investigate a novel vortex ring personalized ventilation (VRPV) system.
  • To analyze the formation, transportation, and ventilation characteristics of VRPV.
  • To evaluate the efficiency and fresh air ratio of VRPV compared to conventional methods.

Main Methods:

  • Development of a piston-cylinder based vortex ring generator.
  • Utilizing high-speed cameras for observing vortex ring dynamics.
  • Employing tracer gas experiments to quantify ventilation performance and fresh air ratios.
  • Analyzing vortex ring volume, translational velocity, and deviation over distance.

Main Results:

  • Piston velocity was found to dictate the initial translational velocity of the vortex rings, with a predictive equation proposed.
  • The deviation range of VRPV was influenced by generator and environmental interference.
  • VRPV demonstrated a fresh air ratio up to 159.3% higher than symmetrical round jets within a 0-4m range.

Conclusions:

  • The VRPV system effectively forms, transports, and ventilates air using vortex rings.
  • The system exhibits superior fresh air delivery efficiency compared to round jets for personalized ventilation.
  • VRPV shows significant potential for high-efficiency personalized ventilation applications, reducing fresh airflow rates.