MRCP UK EXAMINATIONS

Detailed explanation-1: -Compression atelectasis is secondary to increased pressure exerted on the lung causing the alveoli to collapse. In other words, there is a decreased transmural pressure gradient (transmural pressure gradient = alveolar pressure-intrapleural pressure) across the alveolus resulting in alveolar collapse.

Detailed explanation-2: -Atelectasis (at-uh-LEK-tuh-sis) is a complete or partial collapse of the entire lung or area (lobe) of the lung. It occurs when the tiny air sacs (alveoli) within the lung become deflated or possibly filled with alveolar fluid. Atelectasis is one of the most common breathing (respiratory) complications after surgery.

Detailed explanation-3: -Atelectasis happens when lung sacs (alveoli) can’t inflate properly, which means blood, tissues and organs may not get oxygen. It can be caused by pressure outside of your lung, a blockage, low airflow or scarring. The most common cause of atelectasis is surgery with anesthesia.

Detailed explanation-4: -Compressive atelectasis occurs when something pushes on and compresses the lungs. Contraction atelectasis is due to scar tissue, or fibrosis, interfering with alveoli expansion and contraction. Finally, adhesive atelectasis occurs when there is a loss of surfactant on the alveoli.