Ch.6 - Recognizing a Pleural Effusion Flashcards
Approx. …L of fluid will cause opacification of the entire hemithorax in an adult.
2L.
Subpulmonic effusions:
Most pleural effusions begin life collecting in the pleural space between the hemidiaphragm and the base of the lung –> These are called subpulmonic effusions.
As the amount of fluid increases, it forms a … shape on the upright frontal chest radiograph due to the natural elastic recoil properties of the lung.
Meniscus.
Loculated effusions:
With pleural adhesions (usually from old infection or hemothorax) the fluid may assume unusual appearances or occur in atypical locations. Such effusions are said to be loculated.
Pseudotumor:
It is a type of effusion that occurs in the fissures of the lung (mostly the MINOR fissure) and is most frequently 2o to CHF.
It clears when the underlying failure is treated.
Laminar effusions:
Are best recognized at the lung base just above the costophrenic angles on the frontal projection and most often occur as a result of either CHF or lymphangitic spread of malignancy.
A hydropneumothorax:
Consists of both air and increased fluid in the pleural space and is recognizable on an upright view of the chest by a straight, air-fluid interface rather than the typical meniscus shape of pleural fluid alone.
Pleural fluid is produced primarily at the … pleura?
PARIETAL
Pleural fluid is resorbed at the … pleura + by LYMPHATIC drainage through the … pleura.
visceral, parietal.
How can atelectasis cause a pleural effusion?
Via decreased pressure in the pleural space.
MCC of an EXUDATE pleural effusion is?
Malignancy
Hemothorax?
Has a fluid Ht >50% of blood Ht.
SLE pleural effusions - Which side?
Usually BILATERAL, but when UNILATERAL, the effusions are usually LEFT-SIDED.
3 conditions that can produce effusions on EITHER side, but are usually UNILATERAL?
- TB, and other infectious agents, including viruses.
- Pulmonary thromboembolic disease.
- Trauma.
Diseases that usually produce LEFT-SIDED effusions?
- Pancreatitis.
- Distal thoracic duct obstruction.
- Dressler.
Diseases that usually produce RIGHT-SIDED effusions?
- Abdominal disease related to the liver or ovaries (Meigs syndrome).
- RA - Effusion unchanged for years.
- Proximal thoracic duct obstruction.
Dressler syndrome presentation?
Typically occurs 2-3 weeks after a transmural MI producing:
- Left pleural effusion.
- Pericardial effusion.
- Patchy airspace disease at the left lung base.
How much pleural fluid is needed for the POSTERIOR costophrenic SULCUS to be blunted?
75mL.