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Related Concept Videos

Factors Affecting Pulmonary Ventilation01:19

Factors Affecting Pulmonary Ventilation

Besides the pressure difference between the external environment and the lungs, the airflow rate and ease of pulmonary ventilation are also influenced by three other factors: surface tension of the fluid in the alveoli, compliance of the lungs, and airway resistance.
Alveolar Surface Tension
The alveolar fluid lines the luminal surface of the alveoli and exerts a force called surface tension. This force is caused by the polar water molecules in the liquid being more strongly attracted to each...
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...
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...
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)
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...
Assessment of Ventilation I: Respiratory Rate01:20

Assessment of Ventilation I: Respiratory Rate

Assessment of Ventilation
A Ventilation assessment is critical for monitoring a patient's health status. Respiration, one of the most accessible vital signs, provides insights into the function of numerous body systems and can indicate serious health issues, such as brainstem injuries from head trauma.
Critical Guidelines for Assessing Ventilation:

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Related Experiment Video

Updated: Jun 2, 2026

Ex Vivo Porcine Experimental Model for Studying and Teaching Lung Mechanics
12:09

Ex Vivo Porcine Experimental Model for Studying and Teaching Lung Mechanics

Published on: April 19, 2024

Variable ventilation improves ventilation and lung compliance in preterm lambs.

J Jane Pillow1, Gabrielle C Musk, Carryn M McLean

  • 1School of Women's and Infants' Health, M550, University of Western Australia, 374 Bagot Rd, Subiaco, Perth, WA 6008, Australia. jane.pillow@uwa.edu.au

Intensive Care Medicine
|May 14, 2011
PubMed
Summary
This summary is machine-generated.

Variable ventilation improves lung function in preterm lambs by enhancing ventilation efficiency and dynamic compliance. Unlike in adults, this method did not significantly affect arterial oxygenation in the immature lung.

Related Experiment Videos

Last Updated: Jun 2, 2026

Ex Vivo Porcine Experimental Model for Studying and Teaching Lung Mechanics
12:09

Ex Vivo Porcine Experimental Model for Studying and Teaching Lung Mechanics

Published on: April 19, 2024

Area of Science:

  • Neonatal Physiology
  • Respiratory Mechanics
  • Mechanical Ventilation

Background:

  • Mechanical ventilation is crucial for preterm infants.
  • Variable tidal volume and rate ventilation improves outcomes in adult lungs.
  • The effects on immature lungs are not well understood.

Purpose of the Study:

  • To assess the physiological consequences of variable ventilation in immature lungs.
  • To compare variable ventilation with conventional ventilation in preterm lambs.
  • To evaluate effects on lung mechanics and gas exchange.

Main Methods:

  • Preterm lambs received surfactant and were ventilated conventionally or with variable parameters.
  • Lung mechanics and gas exchange were measured.
  • Bronchoalveolar lavage and lung tissue cytokine mRNA were quantified.

Main Results:

  • Variable ventilation lowered PaCO2 and mean airway pressure.
  • Ventilation efficiency index and dynamic compliance were higher with variable ventilation.
  • Oxygenation indices and static compliance were not significantly different.

Conclusions:

  • Variable ventilation improves ventilation efficiency and dynamic compliance in preterm lungs.
  • Unlike in adult models, variable ventilation did not improve arterial oxygenation in preterm lambs.
  • Further research is needed to optimize ventilation strategies for neonates.