Lung Abscess Flashcards
What is a lung abscess?
A lung abscess is a collection of pus in the lung parenchyma that causes a cavity to form. Commonly in right lower lobe due to aspiration
What is seen on imaging for lung abscess?
An air-fluid level is often seen on imaging due to necrotic debris within the cavity.
What are the risk factors for abscess formation?
Chronic aspiration
Poor oral hygeine
Immunosuppression
Thoracic trauma
What is the most common cause of lng abscess?
Aspiration
What are general causes of lung absence?
Necrotising pneumonia
Infective endocarditis
Tuberculosis
Bronchial obstruction
What are common causes of necrotising pneumonia?
Staphylococcus aureus
Kleibsella pneumonia
Pseudomonas
Proteus
What are the features of lung abscess?
Fevers
Productive cough
Shortness of breath
Lethargy
Night sweats
Weight loss
Can cause haemoptysis
Abscesses near the pleura can cause pleuritic chest pain
What are the signs of lung abscess?
Finger clubbing
Localised dullness to percussion
Reduced air entry over the abscess
What are the investigations for lung abscess?
Sputum microscopy and culture
FBC
CXR
