Related Experiment Video
Updated: Dec 11, 2025
11:26
Real-time X-ray Imaging of Lung Fluid Volumes in Neonatal Mouse Lung
Published on: July 18, 2016
9.1K
Synchronized Inflations Generate Greater Gravity-Dependent Lung Ventilation in Neonates
Georgie Dowse1, Elizabeth Perkins2, Jessica Thomson1
1Neonatal Research, Murdoch Children's Research Institute, Parkville, Australia; Department of Paediatrics, The University of Melbourne, Parkville, Australia.
The Journal of Pediatrics
|August 23, 2020
Summary
Synchronized mechanical ventilation in infants promotes more uniform lung ventilation and better distribution of tidal volume, especially in the gravity-dependent lung regions. This improves overall respiratory support for neonates.
Area of Science:
- Neonatal respiratory physiology
- Mechanical ventilation strategies
- Pulmonary imaging techniques
Background:
- Infants often require mechanical ventilation due to respiratory distress.
- Synchronizing ventilators with infant breathing efforts is crucial for optimal outcomes.
- Understanding regional ventilation distribution is key to refining ventilation strategies.
Purpose of the Study:
- To investigate regional lung ventilation patterns during mechanical ventilation in infants.
- To compare ventilation distribution during synchronous versus asynchronous breathing efforts.
- To assess the impact of synchrony on tidal volume distribution and gravity dependence.
Main Methods:
- Utilized electrical impedance tomography (EIT) to measure regional tidal volume distribution.
- Employed a Florian Respiratory Monitor to capture airway flow and delivered pressure.
- Classified ventilator inflations as synchronous or asynchronous based on video recordings.
Main Results:
- Analyzed 2749 inflations across 19 infants.
- Synchronous inflations showed more homogenous tidal volume distribution (center of ventilation) along the right-to-left lung axis.
- Ventilation was more gravity-dependent and uniform in the dependent lung during synchronous inflations.
Conclusions:
- Synchronous mechanical ventilation leads to more gravity-dependent lung ventilation.
- Synchronized inflations result in more uniform right-to-left ventilation compared to asynchronous inflations.
- Optimizing ventilator synchrony can enhance ventilation homogeneity in infants.
Related Concept Videos
01:24Pulmonary Ventilation: Inhalation
6.8K
Pulmonary ventilation is a vital process that ensures the exchange of oxygen and carbon dioxide in the lungs. It refers to the movement of air into and out of the lungs, enabling the body to obtain oxygen and remove waste carbon dioxide. In this article, we will explore the intricacies of pulmonary ventilation, including its underlying principles, mechanisms, and the interplay of pressures within the respiratory system.
Boyle's law becomes particularly pertinent when examining respiratory...
Boyle's law becomes particularly pertinent when examining respiratory...
6.8K
01:17Pulmonary Cycle: Exhalation
2.7K
In terms of human respiration, the act of expelling air, known as exhalation (or expiration), operates on the principle of pressure gradients. During expiration, the pressure within the lungs exceeds that of the surrounding atmosphere. Under normal conditions, quiet breathing involves passive exhalation and is free of muscular contractions. This is because the exhalation process is driven by the natural elastic recoil of the lungs and chest wall, both of which have an inherent tendency to...
2.7K
01:24Pressure Relationships in Thoracic Cavity
5.1K
Breathing, otherwise known as pulmonary ventilation, is the process of air movement into and out of the lungs. The main mechanisms propelling pulmonary ventilation are atmospheric pressure (Patm), intra-pulmonary (Ppul ) or intra-alveolar pressure (Palv) within the alveoli, and intrapleural pressure (Pip) within the pleural cavity.
Breathing Mechanisms
Both intra-alveolar and intrapleural pressures rely on specific lung properties. The ability to breathe—allowing air to enter the lungs...
Breathing Mechanisms
Both intra-alveolar and intrapleural pressures rely on specific lung properties. The ability to breathe—allowing air to enter the lungs...
5.1K
01:19Factors Affecting Pulmonary Ventilation
2.5K
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...
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...
2.5K
01:05Breathing
63.6K
The process of breathing, inhaling and exhaling, involves the coordinated movement of the chest wall, the lungs, and the muscles that move them. Two muscle groups with important roles in breathing are the diaphragm, located directly below the lungs, and the intercostal muscles, which lie between the ribs. When the diaphragm contracts, it moves downward, increasing the volume of the thoracic cavity and creating more room for the lungs to expand. When the intercostal muscles contract, the ribs...
63.6K
01:15Respiratory Volumes
2.6K
Respiratory volumes are crucial metrics, meticulously measured to quantify the air exchanged in and out of the lungs during various phases of the breathing cycle. These precise measurements are vital for assessing lung function, diagnosing respiratory conditions, and monitoring overall respiratory health. Each parameter provides specific insights into the mechanics of breathing and the functional capacity of the lungs.
Tidal Volume (TV) Tidal volume (TV) is the air inhaled or exhaled in a...
Tidal Volume (TV) Tidal volume (TV) is the air inhaled or exhaled in a...
2.6K