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Related Concept Videos

Pneumothorax-II01:27

Pneumothorax-II

Pneumothorax is a medical condition defined by the buildup of air in the pleural space between the lungs and the chest wall. This accumulation of air can lead to partial or complete lung collapse, resulting in a range of clinical manifestations. Understanding the clinical presentation and effective management strategies is crucial for healthcare professionals in providing timely and appropriate care to individuals with pneumothorax.
Clinical Manifestations:
Pneumothorax II: Pathophysiology01:08

Pneumothorax II: Pathophysiology

Pneumothorax means the presence of air in the pleural space — the thin potential gap between the visceral and parietal pleura. This condition disrupts the normal pressure balance that keeps the lungs inflated, leading to partial or complete collapse of the affected lung.Normal physiologyUnder normal conditions, the pleural space maintains a slightly negative intrapleural pressure, which keeps the lungs expanded against the chest wall. This negative pressure creates a delicate balance between...
Atelectasis II: Pathophysiology01:10

Atelectasis II: Pathophysiology

Atelectasis develops when alveoli lose their air and collapse inward. Because lung tissue is naturally elastic, these air sacs shrink rather than remaining open. Collapsed alveoli are no longer ventilated, reducing their role in gas exchange. Blood flow may continue in these regions, creating a ventilation–perfusion mismatch. Clinical findings include decreased breath sounds, dullness to percussion, reduced chest expansion, and decreased tactile fremitus as sound transmission through collapsed...
Pneumothorax-I01:26

Pneumothorax-I

A pneumothorax is a condition where air builds up in the space between the lung and the chest wall, causing the lung to collapse. This condition arises when air enters the space between the parietal and visceral pleura, disrupting the negative pressure essential for lung inflation. This can lead to a partial or complete collapse of the lung.
Pneumothorax can be even further classified as spontaneous, traumatic, and tension pneumothorax.
Acute Respiratory Failure-IV01:23

Acute Respiratory Failure-IV

Respiratory failure can manifest suddenly or gradually, characterized by a rapid decline in PaO2 and a rapid rise in PaCO2. This situation indicates a severe respiratory problem that may quickly become a life-threatening emergency. One of the early signs of hypoxemic Acute Respiratory Failure (ARF) is a change in mental status due to the brain's sensitivity to oxygen levels and changes in acid-base balance. Symptoms such as restlessness, confusion, and agitation suggest inadequate oxygen...
Acute Respiratory Failure-II01:21

Acute Respiratory Failure-II

Type I Respiratory Failure, or hypoxemic respiratory failure, occurs when the partial pressure of oxygen (PaO2) in arterial blood falls below 60 mmHg while breathing room air without a corresponding increase in arterial carbon dioxide levels (PaCO2). This condition highlights a significant impairment in the lungs' capacity to oxygenate the blood.
The underlying physiological abnormalities that contribute to hypoxemic respiratory failure include:

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Monitoring Lung Function with Electrical Impedance Tomography in the Intensive Care Unit
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Transient decrease in PaCO(2) and asymmetric chest wall dynamics in early progressing pneumothorax.

Dan Waisman1, Anna Faingersh, Carmit Levy

  • 1Department of Neonatology, Faculty of Medicine, Carmel Medical Center, 7 Michal St, 34632, Haifa, Israel. dwaisman@netvision.net.il

Intensive Care Medicine
|November 27, 2012
PubMed
Summary

Delayed diagnosis of pneumothorax (PTX) in newborns may stem from transient CO(2) decreases. Monitoring chest wall tidal displacements (TDi) offers an earlier sign of PTX by detecting asymmetric ventilation.

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Area of Science:

  • Neonatal Medicine
  • Respiratory Physiology
  • Diagnostic Imaging

Background:

  • Pneumothorax (PTX) diagnosis in neonates is often delayed.
  • Understanding early diagnostic indicators is crucial for timely intervention.

Purpose of the Study:

  • To identify diagnostic indices for early detection of progressing pneumothorax (PTX).
  • To explain reasons for delayed PTX diagnoses in clinical settings.

Main Methods:

  • Progressing PTX was induced in rabbits by air injection into the pleural space.
  • Hemodynamic parameters, ventilation, blood gases, and chest wall tidal displacements (TDi) were monitored.
  • End-tidal carbon dioxide (EtCO(2)) and arterial carbon dioxide (PaCO(2)) changes were analyzed.

Main Results:

  • A significant, prolonged transient decrease in EtCO(2) and PaCO(2) was observed, contrary to expectations.
  • Decreased CO(2) levels mirrored increased tidal volume, suggesting altered respiratory mechanics.
  • Chest wall tidal displacements (TDi) showed the earliest and most sensitive sign of PTX, indicating asymmetric ventilation.

Conclusions:

  • The counterintuitive transient decrease in CO(2) without immediate SpO(2) changes may explain diagnostic delays.
  • Monitoring TDi provides an earlier indication of PTX by revealing asymmetric ventilation on the affected side.