Atelectasis (Obstructive)

Atelectasis (Obstructive) is a condition where part of the lung collapses due to a blockage in the airways. This blockage prevents air from reaching the affected lung tissue, causing it to shrink and lose function. The lungs are part of the respiratory system, which is responsible for breathing and oxygen exchange. When a section of the lung collapses, it can lead to difficulty breathing, reduced oxygen levels, and sometimes chest discomfort. The blockage can be caused by mucus plugs, tumors, or foreign objects. This condition affects how well the lungs can provide oxygen to the body, impacting overall health.

Atelectasis (Obstructive) is defined as the collapse of lung tissue distal to an airway obstruction, resulting in loss of lung volume. The core pathology involves airway obstruction that prevents ventilation of the affected alveoli, leading to alveolar collapse and impaired gas exchange. Common causes include mucus plugs, endobronchial tumors, or foreign bodies. This condition is clinically significant because it can cause hypoxemia, predispose to infection, and impair respiratory mechanics. Radiographically, it presents as volume loss with mediastinal shift toward the affected side. It is important to distinguish obstructive atelectasis from other types such as compressive or adhesive atelectasis. Prompt recognition is critical to prevent complications such as pneumonia or respiratory failure.