Respiratory Flashcards
What is the description of bronchiectasis?
Chronic infection of the bronchi and bronchioles leading to permanent dilatation of these airways.
What are some symptoms of bronchiectasis?
Productive cough (yellow-green sputum, can become haemoptysis) Recurrent febrile episodes, malaise
What are some signs of bronchiectasis?
Clubbing
Coarse inspiratory crepitations
Wheeze
What are the causes of bronchiectasis?
Congenital
Cystic fibrosis
Bronchiole obstruction (tumour, foreign body)
How do you diagnose bronchiectasis?
CXR - dilated + thickened bronchiole walls
CT - thickened bronchi which are wider than the adjacent blood vessel, cysts
Sputum culture - S. aureus, Pseudomonas, HiB
IgA deficiency
What are some complications of bronchiectasis?
Pneumonia, pneumothorax
Empyema
Metastatic cerebral abscesses
Life-threatening haemoptysis
What is the treatment of bronchiectasis?
- Postural drainage twice daily
- Physiotherapy
- Antibiotics (mild: cefaclor/ciprofloxacin,
flucloxacillin if S. aureus, persistent: ceftazidime) - Bronchodilators (e.g. nebulised salbutamol) + anti-inflammatory agents (e.g. corticosteroids such as prednisolone)
What is the description of cystic fibrosis?
Autosomal recessive disorder in which there is a defect in the CFTR gene.
Failed opening of Cl channel -> increased cAMP -> increased viscosity of airway secretions.
What are some symptoms of cystic fibrosis?
Recurrent infections, cough, wheeze Sinusitis, nasal polyps Breathlessness Haemoptysis Steatorrhoea Malabsorption Failure to thrive as a neonate
What are some signs of cystic fibrosis?
Cyanosis
Finger clubbing
Bilateral coarse crackles
How do you diagnose cystic fibrosis?
Sweat test Genetic testing (common CF mutations)
What is the treatment of cystic fibrosis?
Lifestyle advice (smoking, vaccines) Antibiotics (as per bronchiectasis) SABAs, ICS for symptoms Physiotherapy to develop techniques for better breathing Gene therapy is not yet possible
What is the description of allergic bronchopulmonary aspergillosis?
An allergic condition caused by type 1 and type 2 hypersensitivity reactions to Aspergillus fumigatus.
What are some symptoms of allergic bronchopulmonary aspergillosis?
Wheeze Cough Sputum Dyspnoea Recurrent pneumonia
How do you diagnose allergic bronchopulmonary aspergillosis?
CXR- transient segmantal collapse or bronchiectasis
Sputum culture - Aspergillus
What is the treatment of allergic bronchopulmonary aspergillosis?
Prednisolone for acute attacks
Bronchodilators for asthma
What is the description of aspergilloma?
A fungus ball within a pre-existing cavity (usually caused by TB or sarcoidosis)
What are some symptoms of aspergilloma?
Cough
Haemoptysis
Lethargy +/- weight loss
How do you diagnose aspergilloma?
CXR- round opacity within an apical cavity
Sputum culture
What is the treatment for aspergilloma?
Only if symptomatic
Surgical excision
What is the description of invasive aspergillosis?
Occurs when the immune system fails to prevent Aspergillus spores from entering the bloodstream via the lungs
What are some risk factors for invasive aspergillosis?
Immunocompromised patients (HIV, leukaemia, burns) Broad-spectrum antibiotic therapy
What are some symptoms of invasive aspergillosis?
Fever and chills
Haemoptysis
Shortness of breath
Chest and joint pain
How do you diagnose invasive aspergillosis?
Lung biopsy
What is the treatment for invasive aspergillosis?
Voriconazole
What is the description of extrinsic allergic alveolitis?
Widespread diffuse inflammatory reaction in small airways and alveoli due to inhalation of foreign antigens, usually from animals.
Cigarette smokers actually have decreased risk.
Type III hypersensitivity
What are some symptoms of extrinsic allergic alveolitis?
Fever and malaise Cough Breathlessness Wheeze Coarse end inspiratory crackles Weight loss
How do you diagnose extrinsic allergic alveolitis?
CXR - fluffy upper zone nodular shadows
CT - ground glass opacity
Restrictive lung pattern
Raised leucocytes + T cells
What is the treatment for extrinsic allergic alveolitis?
Oral prednisolone in early stages
Prevent exposure to allergen
What is the description of lung cancer?
Carcinomas of the lung, bronchial carcinoma being the most common
What are some risk factors of lung cancer?
Cigarette smoking
Asbestos
Radiation
What is the histology of lung cancer?
Squamous cell carcinoma (35%)
Adenocarcinoma (27%)
Small cell carcinoma (20%)
Large cell carcinoma (10%)
What is the description of SCC of the lung?
Arise from epithelial cells
Local, slow metastasis.
Hypercalcaemia, PTH
What is the description of adenocarcinoma of the lung?
Common in non-smokers
Arises from mucus-secreting glandular cells
Metastasises widely
What is the description of small cell carcinoma of the lung?
Arise from APUD cells; secrete ACTH
Often centrally located
Rapid metastasis
What is the description of large cell carcinoma of the lung?
Poorly differentiated
Metastasises early on
What are some symptoms of lung cancer?
Cough Haemoptysis Dyspnoea Chest pain Weight loss
What are some signs of lung cancer?
Cachexia
Anaemia
Clubbing
Hypertrophic pulmonary osteoarthropathy => wrist pain
Consolidation, collapse, pleural effusion
Metastasis - bone tenderness, hepatomegaly, confusion, fits
What are some complications of lung cancer?
Local - recurrent laryngeal nerve palsy phrenic nerve palsy Horner's syndrome (pan coast tumour) pericarditis Metastatic - Bone pain Anaemia Hypercalcemia
How do you diagnose lung cancer?
Cytology - sputum and pleural fluid
CXR - mass lesions, pleural effusion, hilar adenopathy, slow resolving consolidation, collapse, reticular shadowing
CT - stage the tumour
Bronchoscopy - to give histology and assess operability
What is the treatment of lung cancer?
Non-small cell tumours - Surgical excision or radical radiotherapy
Small cell tumours - chemotherapy
Surgery - can be curative. In stage III, treat with chemo to shrink tumour before surgery. Contraindicated if tumour is near hilum and/or evidence of metastasis.
Drugs - analgesia, steroids, anti-emetics, bronchodilators, anti-depressants
What is the description of asthma?
A lung disorder in which inflammation causes the bronchi to swell and narrow the airways.
What are some symptoms of asthma?
Chest tightness
Wheeze
Dry cough
Breathlessness
What are some signs of asthma?
Hyperinflated chest
Hyperesonant percussion note
Severe attack - inability to complete sentences, pulse more than 110bpm, respiratory rate >25bpm, PEF 33-50% predicted
Life-threatening attack - silent chest, confusion, exhaustion, cyanosis, SPO2 less than 92%, bradycardia, PEF less than 33% predicted
Near fatal attack - Highly increased PaCO2
How do you diagnose asthma?
Acute attack - PEF, sputum culture, FBC, U&E, CRP, ABG analysis (shows signs of hyperventilation)
Chronic - PEF monitoring, spirometry, FEV1/FVC ratio
What is the treatment of an acute attack of asthma?
O - Oxygen
S - Salbutamol (nebulised)
H - Hydrocortisone (IV)
I - Ipratropium (nebulised)
T - Theophylline (oral)
M - Magnesium sulfate (IV)
AN - Anaesthetist
What is the treatment of chronic asthma?
Step 1 - SABA for symptoms relief
Step 2 - Add inhaled corticosteroids (e.g. beclometasone)
Step 3 - Add LABA every 12 hours by inhaler
Step 4 - Increased dose of corticosteroid and add theophylline (oral), SABA (oral) or leukotriene receptor antagonist (oral)
Step 5 - Add daily oral prednisolone
What is the description of COPD?
Encompasses 2 main clinical syndromes: chronic bronchitis and emphysema.
Characterised by airflow obstruction that is mostly irreversible.
What are the two types of COPD patients?
Pink puffers - high alveolar ventilation, near normal PaO2 and low PaCO2. Breathless but not cyanosed. May progress to type 1 respiratory failure.
Blue bloaters - low alveolar ventilation, low PaO2 and a high PaCO2. They are cyanosed but not breathless. May go on to develop cor pulmonale. Supplemental oxygen should be given with care.
What are some symptoms of COPD?
Productive cough
Wheeze
Breathlessness
Infective exacerbations
What are some signs of COPD?
Tachypnoea
Use of accessory muscles of respiration
Hyperinflation
Cyanosis
What are some potential complications of COPD?
Hypertension Osteoporosis Weight loss Cor pulmonale Respiratory failure
How do you diagnose COPD?
FBC - increased PVC
CXR - hyperinflation, large pulmonary arteries, cor pulmonale
ABG - PaO2 decreased
Lung function - Obstructive (FEV1 low, FEV1/FVC ratio reduced)