L04: Effusions Flashcards
What is the pleural space
The space betwwen the viscera and the parietal plerua
What does the visceral pleura cover
The lungs
What does the parietal pleura cover
The chest wall
What is in the pleural space
Pleural fluid
Low protein content
What are the 2 types of pleural disease
Pleural effusion
Pneumothorax
What is pleural effusion
Build up of fluid in the pleural space
What is pneumothorax
Build up of air in the pleural space
What are the types of pleural effusion according to the fluid
Transudate
Exudate
What is transudate
Fluid that appears clear and protein content is low
What is exudate pleural effusion
Due to an inflammatory process, fluid is cloudy and fluid content is high protein
What are the causes of transudate fluid
Failures: heart failure, liver failure, renal failure
Hypoabuminaemia
What are the causes for exudate fluid
Infections
Malignancy
PE
Inflammation; pancreatitis
What are the presentations/symptoms for pleural effusion
Short of breath
Pleuritic chest pain
Cough
If the effusion is more than 300ml what are the physical examination findings that you may find
Dullness to percusion
Decreased tactile fremitus
Decreased breath sounds
Decreased focal resonance
What is the gold standard diagnostic investigation for pleural effusion
Cxr
After confirming that there is a pleural effusion what is the next step
To determine the fluid and take the fluid out
How do we take the fluid out in a pleural effusion
By aspiration (thoracentesis)
When the fluid is taken out by aspiration what happnes to the fluid
Is taken to :
Biochemistry: protein, LDH, protein
Microbiology: for infection, gram stain, microbiology, culture, tb
Cytology: for maligant cells
After sending the pleural effusion sample what is the next question we need to determine
Is the effusion exudate or transudate
How do we tell the difference between exudate and transudate fluid
Exudate: pleural fluid is more than 35
Transudate: pleural fluid is less than 25
What happens if the fluid has a protein content between 25-35, how do we determine what fluid it is
We use the LIGHTS criteria to differentiate