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Related Concept Videos

Ventilatory Modes01:14

Ventilatory Modes

94
Mechanical ventilators are life-saving devices that support or replace spontaneous breathing. They deliver breaths to patients through varying methods known as ventilator modes. Understanding these modes is critical for healthcare providers managing patients with respiratory failure.
There are three ventilatory modes: full support, partial support, and spontaneous. These are described below.
Full Support Modes
Full support modes include controlled mechanical ventilation, continuous mandatory...
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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...
87
Mechanical Ventilation I: Indication and Settings01:29

Mechanical Ventilation I: Indication and Settings

230
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...
230
Mechanical Ventilation II: Invasive Ventilation01:23

Mechanical Ventilation II: Invasive Ventilation

121
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...
121
Oxygen Delivering System II: Venturi Mask and Transtracheal Oxygen01:16

Oxygen Delivering System II: Venturi Mask and Transtracheal Oxygen

429
Oxygen therapy is a pivotal aspect of medical care, particularly for patients with respiratory ailments. Two prominent oxygen-delivering systems include the Venturi mask and the transtracheal oxygen catheter.
Venturi Mask
The Venturi mask, named after the Venturi effect, is designed to deliver precise oxygen concentrations. It consists of a large tube with an oxygen inlet that narrows down, causing a pressure drop that pulls air in through adjustable side ports. The mask is a lightweight,...
429
Oxygen Delivering System I: Nasal Cannula and Face Mask01:26

Oxygen Delivering System I: Nasal Cannula and Face Mask

268
The human body requires oxygen to function, and when the natural process of respiration is hindered, external devices, including the following, are needed to help deliver this vital gas.
Nasal Cannula
A nasal cannula is a lightweight tube split at one end into two prongs and placed in the nostrils. It is typically used to deliver low to medium levels of oxygen.
Suggested flow rate: The suggested flow rate for a nasal cannula typically ranges between 1 and 6 L/min.
Oxygen percentage setting:...
268

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Normothermic Negative Pressure Ventilation Ex Situ Lung Perfusion: Evaluation of Lung Function and Metabolism
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Head-neck local ventilation mode for long-narrow mine working face.

Jue Wang1,2,3, Cheng Jiang4, Xihua Zhou2,3

  • 1School of Civil Engineering, Liaoning Technical University, Fuxin, 123000, China.

Scientific Reports
|August 23, 2024
PubMed
Summary

This study introduces jet ventilation in crossflow (JVIC) for localized cooling in mines. It enhances worker thermal health and cooling efficiency in hot underground environments.

Keywords:
Air distributionHead-neck local coolingJet ventilation in crossflow (JVIC)Mine heat hazardNon-uniform environment control

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Area of Science:

  • Occupational Health and Safety
  • Mine Ventilation Engineering
  • Fluid Dynamics

Background:

  • Underground mines present significant heat hazards for workers.
  • Existing mine ventilation systems often lack localized cooling efficiency.
  • Improving thermal comfort is crucial for worker health and productivity.

Purpose of the Study:

  • To propose an effective air distribution strategy for localized cooling of mine workers.
  • To enhance the utilization efficiency of cooling capacity in mine ventilation.
  • To address the thermal health challenges in hot underground mining environments.

Main Methods:

  • Developed a jet ventilation in crossflow (JVIC) strategy using underground cold air jets and mainstream ventilation.
  • Conducted flow visualization experiments in confined spaces to identify flow patterns.
  • Analyzed the influence of velocity ratio (R) and confinement scale (C) on JVIC flow patterns.

Main Results:

  • Identified five distinct flow patterns for JVIC in confined spaces.
  • Provided a parametric description of the resulting flow field based on R and C.
  • Defined effective and ineffective cooling zones for JVIC air distribution control.

Conclusions:

  • JVIC offers a viable solution for localized cooling around mine workers' head-neck.
  • The study provides a framework for assessing JVIC's cooling effect and efficiency.
  • This approach can help manage non-uniform thermal conditions in underground mines.