Hypersensitivity Pneumonitis Flashcards
1
Q
What is hypersensitivity pneumonitis?
A
- Inflammation of the alveoli caused by hypersensitivity to inhaled dusts
2
Q
What presents with hypersensitivity pneumonitis?
A
- Granulomas
3
Q
What type of hypersensitivity reactions result in the formation of granulomas?
A
Immune complex mediated combined type 3 and 4
4
Q
What happens to gas transfer in hypersensitivity pneumonitis?
A
- Reduced
5
Q
What can result from the reduced gas transfer?
A
- Respiratory failure
6
Q
What will type 4 reaction result in?
A
- Soft centriacinar epithelioid granuloma
7
Q
What zone is affected by hypersensitivity pneumonitis?
A
- Upper zone
8
Q
What are the symptoms?
A
- Fever
- Dry cough
- Chills following exposure to antigen
- Wheeze
- Malaise
9
Q
What are the signs?
A
- Dyspnoea
- Tachypnoea
- Crackles
