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How To Pronounce damoiseau
Pleural effusions are collections of fluid within the pleural space. The term is usually reserved for collections of serous fluid and therefore excludes haemothoraxchylothoraxand pyothorax empyema. Effusions may cause mass effect on the adjacent lung causing collapse, breathlessness, and respiratory compromise.
Assuming that an effusion excludes non-serous pleural collections, they can be categorized as a transudate or an exudate based on the specific gravity and protein concentration of the fluid.
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Transudates are caused by fluid shifts because of increased in-vessel pressures left heart failure or decreased oncotic pressures hypoalbuminaemia, cirrhosis, nephrotic syndrome. Exudates are caused by disruption of the pleural membrane which results in reduction in the ability to absorb pleural fluid.
This may be secondary to damiiseau pneumoniainflammation e. Fluid in the pleural space initially accumulates in the posterior pleural recess when erect and is not seen on a frontal radiograph until there is at least ml.
When a film is semi-recumbent or supine, larger volumes of fluid may be masked.
Fluid on a plain film will appear relatively dense compared to the air in the lung and form a meniscus at the costophrenic angle. Large volume pleural effusions cause pressure on the adjacent lung resulting in collapse.
However, if the volume of the effusion is greater than the degree of collapse, there will be accompanying mediastinal shift. You can also scroll through stacks with your mouse wheel or the keyboard arrow keys. Unable to process the form.
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About Blog Go ad-free. This is a basic article for medical students and other non-radiologists Pleural effusions are collections of fluid within the pleural space. Edit article Share article View revision history. Support Radiopaedia and see fewer ads.
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