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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...
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...
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:
Assessment of Ventilation II: Respiratory Depth and Rhythm01:29

Assessment of Ventilation II: Respiratory Depth and Rhythm

Respiratory Depth
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:

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Updated: Jun 18, 2026

Preoxygenation Techniques for Tracheal Intubation in Critically Ill Adults Utilizing Oxygen Mask and Noninvasive Ventilation
07:15

Preoxygenation Techniques for Tracheal Intubation in Critically Ill Adults Utilizing Oxygen Mask and Noninvasive Ventilation

Published on: December 5, 2025

Patient-Ventilator Interaction: Timing Discordance in Invasive Ventilation.

Richard D Branson1, Robert L Chatburn2

  • 1Mr. Branson is affiliated with the University of Cincinnati, College of Medicine and Daedalus Enterprises, Irving, Texas.

Respiratory Care
|June 17, 2026
PubMed
Summary
This summary is machine-generated.

Patient-ventilator discordance, a mismatch in breathing support, is common in mechanically ventilated patients. While its impact is debated, understanding its timing and pathophysiology is key to improving patient comfort and outcomes.

Keywords:
asynchronycyclediscordancedouble triggerfailed triggerflow mismatchlate triggermechanical ventilationmode of ventilationpatient-ventilator interactionpressure support ventilationreverse triggersynchronytrigger.

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Published on: January 30, 2026

Area of Science:

  • Critical Care Medicine
  • Respiratory Physiology

Background:

  • Mechanical ventilation aims to restore gas exchange, protect lungs, and ensure patient comfort.
  • Patient-ventilator discordance, a mismatch in respiratory timing and effort, is a significant clinical challenge.
  • Improving patient-ventilator synchrony is crucial for effective mechanical ventilation.

Purpose of the Study:

  • To explore the pathophysiology of patient-ventilator discordance.
  • To identify methods for recognizing patient-ventilator discordance, particularly related to timing.
  • To discuss the controversial impact of discordance on patient outcomes.

Main Methods:

  • Review of physiologic principles of breathing control.
  • Analysis of pressure and flow waveforms for discordance detection.
  • Examination of existing literature on patient-ventilator interaction.

Main Results:

  • Patient-ventilator discordance is frequently observed in ventilated patients.
  • Recognition of discordance has improved with education and technological advancements.
  • The association between discordance and adverse outcomes like mortality and prolonged ventilation is suggested but not definitively causal.

Conclusions:

  • Understanding the timing and pathophysiology of patient-ventilator discordance is essential.
  • The clinical impact of discordance is variable and depends on type, timing, and patient factors.
  • Further research is needed to clarify the cause-and-effect relationship between discordance and patient outcomes.