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Related Concept Videos

Mechanical Ventilation II: Invasive Ventilation01:23

Mechanical Ventilation II: Invasive Ventilation

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...
Acute Respiratory Failure-III01:30

Acute Respiratory Failure-III

Hypercapnic respiratory failure, also known as Type 2 or ventilatory respiratory failure, is a severe condition characterized by the body's inability to effectively remove carbon dioxide (CO2) from the bloodstream. It leads to an arterial CO2 pressure (PaCO2) exceeding 45 mmHg and a blood pH above 7.35. This situation indicates that the body's ventilatory demand, or the ventilation needed to maintain normal PaCO2 levels, surpasses its supply or the maximum gas flow achievable without causing...
Mechanical Ventilation I: Indication and Settings01:29

Mechanical Ventilation I: Indication and Settings

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...
Mechanical Ventilation III: Noninvasive Ventilation01:23

Mechanical Ventilation III: Noninvasive Ventilation

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 (NIPPV)
Ventilatory Modes01:14

Ventilatory Modes

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...
Acute Respiratory Failure-II01:21

Acute Respiratory Failure-II

Type I Respiratory Failure, or hypoxemic respiratory failure, occurs when the partial pressure of oxygen (PaO2) in arterial blood falls below 60 mmHg while breathing room air without a corresponding increase in arterial carbon dioxide levels (PaCO2). This condition highlights a significant impairment in the lungs' capacity to oxygenate the blood.
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:

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Related Experiment Video

Updated: Jun 18, 2026

Measuring Diaphragm Thickness and Function Using Point-of-Care Ultrasound
05:51

Measuring Diaphragm Thickness and Function Using Point-of-Care Ultrasound

Published on: November 3, 2023

Ventilator-induced diaphragmatic dysfunction.

Basil J Petrof1, Samir Jaber, Stefan Matecki

  • 1Meakins-Christie Laboratories and Respiratory Division, McGill University Health Center and Research Institute, Montreal, Quebec, Canada. basil.petrof@mcgill.ca

Current Opinion in Critical Care
|November 26, 2009
PubMed
Summary
This summary is machine-generated.

Mechanical ventilation can cause diaphragmatic dysfunction, leading to weaning failure. Understanding the cellular mechanisms of ventilator-induced diaphragmatic dysfunction is key to developing new therapies.

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A Structured Approach to Extubation in Mechanically Ventilated Rats
05:05

A Structured Approach to Extubation in Mechanically Ventilated Rats

Published on: July 18, 2025

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Last Updated: Jun 18, 2026

Measuring Diaphragm Thickness and Function Using Point-of-Care Ultrasound
05:51

Measuring Diaphragm Thickness and Function Using Point-of-Care Ultrasound

Published on: November 3, 2023

A Structured Approach to Extubation in Mechanically Ventilated Rats
05:05

A Structured Approach to Extubation in Mechanically Ventilated Rats

Published on: July 18, 2025

Area of Science:

  • Critical Care Medicine
  • Respiratory Physiology
  • Cellular Biology

Background:

  • Diaphragmatic function is crucial for mechanical ventilation weaning.
  • Ventilator-induced diaphragmatic dysfunction (VIDD) is increasingly recognized.
  • Diaphragmatic weakness is common in critically ill patients.

Purpose of the Study:

  • Review evidence linking mechanical ventilation to diaphragmatic dysfunction.
  • Outline cellular mechanisms of VIDD.
  • Discuss implications for future therapeutic strategies.

Main Methods:

  • Review of animal models and human data.
  • Analysis of cellular pathways involved in muscle degradation and synthesis.
  • Examination of current preventive measures.

Main Results:

  • Mechanical ventilation causes diaphragm muscle fiber injury and atrophy.
  • Pathophysiology involves oxidative stress and proteolytic pathways (calpain, caspase, ubiquitin-proteasome).
  • Protein synthesis is downregulated, while degradation pathways are activated.

Conclusions:

  • Diaphragmatic dysfunction is a common cause of weaning failure in ventilated patients.
  • Mechanical ventilation adversely affects diaphragm structure and function.
  • Further research is needed to develop targeted therapies for VIDD.