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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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Fundamental Processes in Respiration:
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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.
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The neurogenic control of respiration coordinates various neural networks and pathways to regulate breathing rate and depth, meeting the body's oxygen and carbon dioxide exchange requirements. This system adapts to physiological and environmental conditions, ensuring optimal breathing patterns.
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Related Experiment Video

Updated: May 6, 2026

Development of a Neonatal Piglet Acute Lung Injury Model Recreating the Early Environment of Preterm Infant Lungs
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Development of a Neonatal Piglet Acute Lung Injury Model Recreating the Early Environment of Preterm Infant Lungs

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The neonatal lung--physiology and ventilation.

Roland P Neumann1, Britta S von Ungern-Sternberg

  • 1Department of Neonatal Intensive Care, Basel University Children's Hospital (UKBB), Basel, Switzerland.

Paediatric Anaesthesia
|October 25, 2013
PubMed
Summary
This summary is machine-generated.

Neonates face significant respiratory risks during anesthesia due to their unique physiology. Employing an open lung strategy and avoiding high tidal volumes (VT) are crucial for safe mechanical ventilation in neonates.

Keywords:
anesthesianeonaterespiratory physiologyventilation

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Area of Science:

  • Neonatal physiology
  • Anesthesiology
  • Pediatric surgery

Background:

  • Neonates possess distinct respiratory physiology making them vulnerable during anesthesia and surgery.
  • Anesthetic and surgical interventions can easily disrupt the balance between closing volume and functional residual capacity, leading to respiratory compromise.

Purpose of the Study:

  • To review neonatal respiratory physiology.
  • To discuss mechanical ventilation techniques for neonates undergoing anesthesia and surgery.
  • To highlight optimal ventilatory strategies and management approaches.

Main Methods:

  • Review of existing literature on neonatal respiratory physiology.
  • Analysis of mechanical ventilation techniques in neonates.
  • Discussion of anesthetic and surgical impacts on neonatal respiratory function.

Main Results:

  • Neonates are at high risk for respiratory complications under anesthesia.
  • An 'open lung strategy,' avoidance of high tidal volumes (VT), and judicious oxygen use are recommended.
  • Surgery within the neonatal intensive care unit may be suitable for critically ill neonates.

Conclusions:

  • Optimal respiratory management requires a multidisciplinary team approach involving anesthetists, surgeons, cardiologists, and neonatologists.
  • Careful consideration of neonatal respiratory physiology is essential for minimizing complications.
  • Tailored ventilatory strategies are key to improving outcomes in this vulnerable population.