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Related Concept Videos

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 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...
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 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)
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...
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...

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Updated: May 24, 2026

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

[Prolonged mechanical ventilation probability model].

J M Añón1, V Gómez-Tello, E González-Higueras

  • 1Servicio de Medicina Intensiva, Hospital Virgen de la Luz, Cuenca, España. jmaelizalde@gmail.com

Medicina Intensiva
|March 6, 2012
PubMed
Summary
This summary is machine-generated.

A new probability model predicts prolonged mechanical ventilation (PMV) using early patient data. This tool aids clinical decision-making, though further validation is recommended.

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Area of Science:

  • Critical Care Medicine
  • Respiratory Medicine
  • Biostatistics

Context:

  • Mechanical ventilation is a life-support measure for critically ill patients.
  • Prolonged mechanical ventilation (PMV) is associated with increased morbidity and mortality.
  • Predicting PMV risk early is crucial for resource allocation and patient management.

Purpose:

  • To develop and validate a probability model for predicting prolonged mechanical ventilation (PMV).
  • The model utilizes variables available within the first 24 hours of mechanical ventilation initiation.
  • It aims to assist clinicians in decision-making regarding ventilation strategies.

Summary:

  • A prospective, multicenter cohort study involving 1661 adult patients requiring mechanical ventilation was conducted.
  • A multivariate risk model was developed using demographic, clinical, and physiological data (APACHE II, SOFA).
  • The model demonstrated moderate accuracy (0.763 training, 0.751 validation) in predicting early mortality, early extubation, and PMV.

Impact:

  • The developed model can serve as an initial tool to aid clinical decision-making for patients on mechanical ventilation.
  • Its moderate accuracy suggests it should be used as a first approach, with results requiring corroboration.
  • Further studies with larger sample sizes and standardized criteria are needed to refine the model's utility.