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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.
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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...
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Pressure Relationships in Thoracic Cavity01:24

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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.
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Breathing01:05

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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...
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Mechanical Ventilation II: Invasive Ventilation01:23

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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.
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Ventilatory Modes01:14

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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.
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Ex Vivo Porcine Experimental Model for Studying and Teaching Lung Mechanics
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Sustained Lung Inflation: Physiology and Practice.

Elizabeth E Foglia1, Arjan B Te Pas2

  • 1Division of Neonatology, The Children's Hospital of Philadelphia, The Hospital of the University of Pennsylvania, The University of Pennsylvania Perelman School of Medicine, 8th Floor Ravdin Building, 3400 Spruce Street, Philadelphia, PA 19104, USA.

Clinics in Perinatology
|November 14, 2016
PubMed
Summary
This summary is machine-generated.

Ensuring lung aeration is vital for newborns. Sustained inflation shows promise as an alternative respiratory support method for preterm infants, potentially improving lung liquid clearance over current standard practices.

Keywords:
Bronchopulmonary dysplasiaLung aerationPretermSustained inflation

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Area of Science:

  • Neonatal Physiology
  • Respiratory Medicine

Background:

  • Lung aeration is critical for newborn survival, especially for extremely preterm infants.
  • Current standard respiratory support, intermittent positive pressure ventilation with positive end-expiratory pressure (IPPV with PEEP), may not be optimal.
  • Alternative methods for promoting lung aeration are actively being investigated.

Purpose of the Study:

  • To review the physiological basis for using sustained inflation (SI) in preterm infants.
  • To evaluate the existing clinical evidence supporting SI as a method for lung aeration and liquid clearance.

Main Methods:

  • Literature review of physiological principles.
  • Analysis of clinical studies investigating sustained inflation in preterm neonates.

Main Results:

  • Sustained inflation offers a potential mechanism for effective lung liquid clearance.
  • Clinical evidence suggests SI may be a viable alternative to IPPV with PEEP for initiating lung aeration.

Conclusions:

  • Sustained inflation presents a compelling physiological rationale for improving neonatal respiratory transition.
  • Further clinical research is warranted to establish SI as a standard of care for respiratory support in preterm infants.