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Related Concept Videos

Ventilatory Modes01:14

Ventilatory Modes

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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 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
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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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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...
322
Cardiopulmonary Resuscitation II: ACLS Airway Management01:22

Cardiopulmonary Resuscitation II: ACLS Airway Management

199
Airway management is a key skill in emergency and critical care settings, as maintaining a clear airway is essential for adequate oxygenation and ventilation.Head Tilt-Chin Lift TechniqueThe head tilt-chin lift maneuver is an essential technique primarily used in patients without suspected cervical spine injuries. To perform this maneuver, one hand is placed on the patient’s forehead, and gentle pressure is applied backward to tilt the head. The fingertips of the other hand are positioned...
199
Factors Affecting Pulmonary Ventilation01:19

Factors Affecting Pulmonary Ventilation

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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...
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Updated: Oct 18, 2025

Quantitative Mapping of Specific Ventilation in the Human Lung using Proton Magnetic Resonance Imaging and Oxygen as a Contrast Agent
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Programmed Multi-Level Ventilation: A Strategy for Ventilating Non-Homogenous Lungs.

Filip Depta1,2, Pavol Torok1,2, Veldon Reeves3

  • 1Department of Critical Care, East Slovak Institute of Cardiovascular Diseases, Košice, Slovakia.

Medical Devices (Auckland, N.Z.)
|September 29, 2021
PubMed
Summary
This summary is machine-generated.

Programmed multi-level ventilation (PMLV) offers a novel approach to mechanical ventilation for non-homogenous lungs. This method cyclically adjusts positive end-expiratory pressure (PEEP) to improve lung recruitment while preventing overdistension and minimizing lung injury.

Keywords:
acute respiratory distress syndromepositive end expiratory pressureprogrammed multi-level ventilationtime constant

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Area of Science:

  • Critical Care Medicine
  • Respiratory Physiology
  • Pulmonary Engineering

Background:

  • Mechanical ventilation (MV) is crucial in ICUs but can cause ventilator-induced lung injury (VILI).
  • Lung non-homogeneity, common in ALI and ARDS, exacerbates VILI risk.
  • Current protective strategies like low tidal volumes and high PEEP have limitations, including hemodynamic compromise and overdistension.

Purpose of the Study:

  • To introduce and review Programmed Multi-Level Ventilation (PMLV) as an advanced approach for ventilating non-homogenous lungs.
  • To highlight PMLV's physiological basis and its potential to mitigate VILI.
  • To discuss how PMLV modifies existing ventilation modes.

Main Methods:

  • PMLV is an extension, not a standalone mode, modifying existing ventilation modes (e.g., PCV, PSV).
  • It utilizes measured time constants (Tau) of the entire respiratory system.
  • Employs cyclic changes in PEEP levels based on physiological principles.

Main Results:

  • PMLV facilitates lung recruitment in areas with long time constants.
  • It protects healthier lung regions from overdistension.
  • Minimizes excessive mechanical power applied to lung tissue, reducing VILI risk.

Conclusions:

  • PMLV offers a physiology-based strategy for managing non-homogenous lungs during mechanical ventilation.
  • It aims to balance lung recruitment with protection against overdistension and excessive mechanical power.
  • PMLV represents a promising advancement in minimizing ventilator-induced lung injury.