Lung diseases Flashcards
Where in the lung airways does asthma affect?
Conducting airways
Where in the lung airways does COPD affect?
Conducting airways and parenchyma
Where in the lung airways does ILD/IPF affect?
Lung parenchyma
Where in the lung airways does TB affect?
Anywhere in the lung
What %FEV1 improvement following Bronchodilator administration is indicative of asthma?
> 12%
Why does asthma worsen in pregnancy?
- 20% increase in o2 consumption
- 15% increase in metabolic rate
- 40-50% increased respiratory minute volume (amount of gas inhaled or exhaled in 1 min)
Factors for a diagnosis of asthma in pregnancy?
History of cough/wheeze/tightness
Reduced FEV1
Reduced FVC:FEV1 ratio
In what weeks of pregnancy is asthma worst?
24-26
Differentials to asthma in pregnancy?
Dyspnoea of pregnancy PE/amniotic fluid embolism Bronchitis/pneumonia Allergic rhinitis/sinusitis HF GORD Vocal cord dysfunction
What drugs should be used in asthma in pregnancy?
All can be used
SABA, LABA, corticosteroid, Theophylline (methyxanthine), chromones.
Corticosteroids associated with low birth weight and pre term birth should not be withheld in severe cases.
Long term treatment therapies for COPD?
Antimuscarinics, LABAs, ICS and LABA,
R/Fs for IPF?
Genetics - MUC5B Smoking Environmental exposure Microbial agents - Herpes (EBV, HHV7/8, CMV) GORD
Presentation of IPF?
Exertional dyspnoea
Dry cough
Clubbing
Diffuse inspiratory crackles
What do you have to exclude to diagnose IPF?
Exclude: Medications, Connective Tissue diseases, environmental exposures
Prognosis of IPF?
Median survival is 3 years
investigations to diagnose IPF?
Usual interstitial pneumonia (UIP) pattern on chest HRCT/ surgical lung biopsy