What causes Subpleural bleb?
A bleb is caused by alveolar rupture, which allows air to travel through the interlobular septum that divides the secondary pulmonary lobules to the subpleural region. The subpleural region is displaced, and a subpleural emphysematous vesicle (i.e., a bleb) is thus formed.
What does a bleb in the lung mean?
A pulmonary bleb is a small collection of air between the lung and the outer surface of the lung (visceral pleura) usually found in the upper lobe of the lung. When a bleb ruptures the air escapes into the chest cavity causing a pneumothorax (air between the lung and chest cavity) which can result in a collapsed lung.
Is a bleb a cyst?
According to the Fleischner Society Glossary of Terms for Thoracic Imaging, a bleb is a cystic space l cm or less in diameter; anything larger than this is defined as a bulla. Bullae can reach substantial size and occupy an entire lobe.
What is a subpleural bleb?
Pulmonary blebs are small subpleural thin-walled air-containing spaces, not larger than 1 or 2 cm in diameter (with the precise limit varying by source). Their walls are less than 1 mm thick. If they rupture, they allow air to escape into the pleural space resulting in a spontaneous pneumothorax.
What does bleb stand for?
BLEB
| Acronym | Definition |
|---|---|
| BLEB | Buffered Listeria Enrichment Broth |
What causes pulmonary blebs?
Blebs are thought to occur as a result of subpleural alveolar rupture, due to overload of the elastic fibers. Pulmonary bullae are, like blebs, cystic air spaces that have an imperceptible wall (less than 1 mm).
What is an emphysematous bleb?
Emphysema is a disease in which alveoli become damaged. They stretch out of shape and often rupture. When an air sac ruptures, air escapes into surrounding tissue. This forms a bubble within the lung. Doctors call it an emphysematous bleb. Scar tissue forms around the bleb.
What are some causes of lung blebs?
A pneumothorax can be caused by: Chest injury. Any blunt or penetrating injury to your chest can cause lung collapse. Lung disease. Damaged lung tissue is more likely to collapse. Ruptured air blisters. Small air blisters (blebs) can develop on the top of the lungs. Mechanical ventilation.
What are apical blebs?
A: In the absence of trauma, causes include tall physique, asthma, ruptured apical bleb or Marfan syndrome (or other connective tissue disorders). A: The surface of the apical portion of the right lung is irregular and the suspicion is that this represents an apical bleb.