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Mechanical Ventilation II: Invasive Ventilation01:23

Mechanical Ventilation II: Invasive Ventilation

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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.
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...
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Mechanical Ventilation III: Noninvasive Ventilation01:23

Mechanical Ventilation III: Noninvasive Ventilation

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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...
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Mechanical Ventilation I: Indication and Settings01:29

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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...
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Factors Affecting Pulmonary Ventilation01:19

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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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Pulmonary Ventilation: Inhalation01:24

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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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Assessment of Ventilation I: Respiratory Rate01:20

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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.
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The Perinatal Asphyxiated Lamb Model: A Model for Newborn Resuscitation
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Mechanical ventilation causes diaphragm dysfunction in newborn lambs.

Feng Liang1, Guillaume Emeriaud2, Dilson E Rassier3

  • 1Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, McGill University Health Centre and Research Institute, 1001 Decarie Boulevard, Montreal, QC, H4A 3J1, Canada.

Critical Care (London, England)
|April 18, 2019
PubMed
Summary
This summary is machine-generated.

Mechanical ventilation rapidly causes diaphragm weakness in newborn lambs, a condition known as ventilator-induced diaphragmatic dysfunction (VIDD). Co-existing lung injury did not worsen this early diaphragm dysfunction.

Keywords:
Lung injuryMechanical ventilationNeonatalSurfactant deficiencyVentilator-induced diaphragmatic dysfunction (VIDD)

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Area of Science:

  • Neonatal physiology
  • Respiratory medicine
  • Critical care research

Background:

  • Ventilator-induced diaphragmatic dysfunction (VIDD) is well-documented in adult animals.
  • The impact of mechanical ventilation (MV) on the neonatal diaphragm remains unclear.
  • It is unknown if co-existing lung disease exacerbates VIDD in neonates.

Purpose of the Study:

  • To investigate the effects of MV on the neonatal diaphragm.
  • To determine if surfactant deficiency-induced respiratory failure worsens VIDD in newborn lambs.

Main Methods:

  • Newborn lambs were divided into control, MV, and MV with surfactant deficiency (MV+SD) groups.
  • Inflammatory signaling, ubiquitin-proteasome system, autophagy, and oxidative stress were assessed.
  • Diaphragm atrophy and contractile function were evaluated.

Main Results:

  • Both MV and MV+SD groups showed a 25-30% decrease in myofibrillar force generation compared to controls.
  • Increased STAT3 phosphorylation was observed in both MV and MV+SD diaphragms.
  • While some markers of the ubiquitin-proteasome system and autophagy were higher in MV+SD, no fiber type atrophy or differences in oxidative stress were found.

Conclusions:

  • Controlled mechanical ventilation rapidly induces diaphragm dysfunction in newborn lambs.
  • The severity of early diaphragm weakness was not influenced by superimposed lung injury from surfactant deficiency.