COPD - still breathless despite using SABA/SAMA and asthma/steroid responsive features
Next step?
Add LABA + ICS
eg salmeterol + fluticasone
If that doesnt work:
Triple therapy - LAMA, LABA and ICS
Mx of cystic fibrosis and diabetes?
High calorie diet with basal bolus insulin
CF patients need high calorie inc high fat diet
What lung disorder increases risk of TB infection?
Silicosis as silica is toxic to macrophages
When can Orkambi be used in CF?
Lumacaftor/Ivacaftor (Orkambi) can be used to treat cystic fibrosis patients who are homozygous for the delta F508 mutation
improves pulmonary function, increase weight and decrease pulmonary exacerbations
Describe lung function tests in obstructive and restrictive airways disease with examples
Obstructive lung disease (e.g. COPD, asthma):
- FEV1: Reduced due to airflow limitation.
- FVC: Normal or slightly reduced.
- FEV1/FVC ratio: Reduced (<0.7), hallmark of obstruction.
- TLC (total lung capacity): Normal or increased due to air trapping/hyperinflation.
- Gas transfer (DLCO): May be reduced in emphysema; normal in asthma.
Restrictive lung disease (e.g. asbestosis, pulmonary fibrosis):
- FEV1: Reduced proportionally to FVC.
- FVC: Reduced due to decreased lung volumes.
- FEV1/FVC ratio: Normal or increased (>0.7) because both FEV1 and FVC fall.
- TLC: Reduced, reflecting restricted lung expansion.
- Gas transfer (DLCO): Usually reduced due to interstitial involvement impairing gas exchange.
Summary: obstructive diseases show a low FEV1/FVC ratio with preserved or increased TLC, while restrictive diseases show a normal/high FEV1/FVC ratio with reduced TLC and impaired gas transfer
What is a common resp complication of TIPS for treatment of portal HTN?
Pulomary HTN, this is because it increases cardiac preload by diverting blod past liver hence reducing peripheral resistance
What is the Berlin criteria for ARDS?
acute onset (within 1 week of a known risk factor)
pulmonary oedema: bilateral infiltrates on chest x-ray (‘not fully explained by effusions, lobar/lung collapse or nodules)
non-cardiogenic (pulmonary artery wedge pressure needed if doubt)
pO2/FiO2 < 40kPa (300 mmHg)
Which drugs can cause pleural effusion?
nitrofurantoin, methotrexate, and amiodarone
What can be used in asthma with high eosinophils?
Mepolizumab - anti-IL5 monoclonal antibody, binds to IL5 and prevents it from binding to its receptor -> down-regulation of eosinophil activity
What paraneoplastic features are associated with Lung Ca - Small cell?
ADH
ACTH - not typical, hypertension, hyperglycaemia, hypokalaemia, alkalosis and muscle weakness are more common than buffalo hump etc
Lambert-Eaton syndrome
What paraneoplastic features are associated with Lung Ca - squamous cell?
parathyroid hormone-related protein (PTH-rp) secretion causing hypercalcaemia
clubbing
hypertrophic pulmonary osteoarthropathy (HPOA)
hyperthyroidism due to ectopic TSH
What paraneoplastic features are associated with Lung Ca - adenocarcinoma?
gynaecomastia
hypertrophic pulmonary osteoarthropathy (HPOA)
Who is more susceptible to Klebsiella pneumonia?
Alcoholic and Diabetics
Redcurrant jelly sputum is suggestive of what pneumonia?
Klebsiella
Causes of upper lob fibrosis?
CHARTS
C - Coal worker’s pneumoconiosis
H - Histiocytosis/ hypersensitivity pneumonitis
A - Ankylosing spondylitis
R - Radiation
T - Tuberculosis
S - Silicosis/sarcoidosis
Crypto going up on the charts
Causes of lower zone fibrosis?
ACID
A- Asbestosis
C- Connective tissue disorders (except ankylosing spondylitis) e.g. SLE, RA
I- Idiopathic pulmonary fibrosis
D- Drug-induced: amiodarone, bleomycin, methotrexate
Acids wreck bases
Mississippi and Ohio River valleys travel hx
dry cough, retrosternal discomfort, fever and chest x-ray evidence of multifocal pneumonia
Dx? mx?
Histoplasmosis
Mx: Amphotericin or itraconazole if immunocompromised, supportive if immunocompetent
What is a possible complication of high pressure NIV?
Pneumothorax
What complication can develop after a pneumonia?
Pulmonary fibrosis
Worsening asthma in combination with sinusitis
Polyneuropathy + eosinophilia + pulmonary infiltrates suggests what dx? Serology?
Eosinophilic granulomatosis with polyangiitis (EGPA) aka Churg-Strauss syndrome - positive pANCA serology
Drug mx of idiopathic lung fibrosis?
Pirfenidone and nintedanib can be used as drug management options in idiopathic pulmonary fibrosis as they may decrease the functional decline, prolong survival and potentially reduce acute exacerbations
Patient with acute asthma who do not respond to full medical treatment
Next step?
Patient with acute asthma who do not respond to full medical treatment and are becoming acidotic should be intubated and ventilated, rather than given BiPAP/CPAP
What is Lofgrens syndrome?
Acute form sarcoidosis characterised by bilateral hilar lymphadenopathy (BHL), erythema nodosum, fever and polyarthralgia.
Mx = Pred, prognosis is excellent
Acute mx of granulomatosis w polyangiitis?
Urgent immunosuppression - IV Methylpred + cyclophsphamide in acutely unwell