Resp: Lung Cancer metastases, Mestholeioma, Goodpasture's Syndrome, Wegener's granulomatosis, Pulmonary thromboembolism, Upper Respiratory Tract Infections, Pharyngitis/Tonsilitis, Epiglottis Flashcards
What macrophages tend to be involved in pneumoconiosis and out immune-mediated lung problems
- ALVEOLAR macrophage
2. INTERSTITIAL macrophages (which live in the lung parenchyma)
What is Caplan’s Syndrome
Caused in all types of pneumoconiosis:
- Rheumatoid Arthritis
- Pneumoconiosis
basically a person with RA has a bigger risk of developing pneumoconiosis, asbestosis, silicosis etc.
What particles size are most dangerous in pneumoconiosis and why
1-5 micrometers
This is because 5-10 won’t make it to the alveoli and less than 1 micrometers can be inhaled back out without causing difficulties
Sites of metastatic spread form lung cancer
- Liver (anorexia, nausea, weight loss, right upper quadrant pain)
- Bone (bony pain)
- Adrenal Glands
- Brain (space occupying lesions)
What cancers spread tot helpings
- Breast cancer
- Bowel cancer
- RENAL CELL CARCINOMA
- Bladder cancer
Clinical presentation of lung cancer
- Cough
- Breathlessness
- Haemoptysis
- Chest pain
- Wheeze
- Clubbing
- Recurrent pneumonia
Symptoms of metastictic disease
- Bone pain
- headaches
- Seizures
- Neurological deficit
- Hepatic pain
- Abdo pain
Factors of paraneoplastic changes in the lung
- PTH secretion
- Inappropriate ADH secretion
- Secretion of ACTH
- Hypertrophic pulmonary osteo-arthropathy
- Finger clubbing
- Non-infective endocarditis
- DIC
What is T1
< 3cm
What is T2
> 3 cm
What is T 3
Invades chest wall , diaphragm and mediastinum
What is T4
Invades mediastinum, heart, great vessels, teaches, oesophagus, vertebra, carina (bifurcation of the bronchi)
What is N0
No Nodes
N1 - hilar nodes
N2 - Same side as mediastinal nodes
N3 - Contralateral mediastinum effected
What is m1a
Tumour on same side
What is m1b
Tumour is elsewhere
Diagnosis of lung cancer
- CXR
- CT
- Bronchoscopy
- Cytology
- FBC
Appearance of lung cancer on CXR
- ROUND SHADOWS with spikes edges
- Hilar enlargement
- Lung collapse
- Pleural effusion
- Consolidation
Why is a CT used in lung cancer
STAGING
Role of bronchoscopy and endobronchial ultrasound for lung cancer
Histology and assess operability
Role of cytology in lung cancer
Sputum and pleural fluid analysis
How is non-small cell lung cancer treated
- SURGICAL EXCISISON
- Curative radiotherapy if pneumonitis and fibrosis is seen
- Chemotherapy and radiotherapy (CETUXIMAB)
How is small cell lung tumours treated
1. CHEMO AND RADIO Usually results in relapses 2. Palliation to relief symptoms 3. Superior vena cava stent + radiotherapy and dexamethasone to treat obstruction 4. Endobronchial therapy 5. Pleural drainage 6. Drugs
Why is radiotherapy use din lung cancer
- Bronchial obstruction
- Haemoptysis
- Bone Pain
- Cerebral metastases
What is endobronchial therapy
- Tracheal stunting
- Cryotherapy
- Brachytherapy (radioactive source is placed close to tumour)
What drugs are given in lung cancer
- Analgesics
- Steroids
- Antiemetics
- Codeine
- Bronchodilators
- Antidepressants
What is mesothelioma
- Tumorus of mesothelial cells of the pleura
Where are mesothelial cells found other than lung pleura
- Peritoneum
- Pericardium
- Testes
At what age does mesothelia present
- 40-70 years
What causes mesothelioma
ASBESTOS
What is th latent period of mesothelioma
UP to 45 years
Pathophysiology of mesothelioma
- Tumour begins as nodules in pleura which extend to surrounding lung and fissures
- Chest wall invaded and infiltrate intercostal nerves = SEVERE PAIN
- Invasion of lymphatics - hilar node metastases
Clinical presentation of mesothelioma
- Chest pain
- Dyspnoea
- Weight loss
- Finger clubbing
- Recurrent pleural effusions
- Breathlessness
Signs of mesothelioma metastases
- Lymphadenopathy
- Hepatomegaly
- Bone pain
- Abdo pain
Diagnostics of mesothelioma
- CXR + CT
- Bloody pleural fluid
- Pleural biopsy
Role of CXR and CT in mesothelioma
- Unilateral pleural effusion
2. Pleural thickening
Treatment of mesothelioma
- Surgery excision
2. RESISTANT to chemotherapy and radiotherapy
What is the average diagnosis to death in mesothelioma
8 months
Why are conducting airways (bronchi) in the lungs worse for drug delivery than respiratory regions (alveoli etc)
Have a smaller surface area and lower regional blood flow
What makes an effective drug
- RAPID ABSORPTION (small hydrophobic molecules)
- PARTICLE SIZE (not too small as they will be exhaled or too big as they will deposit in th upper airways)
- Inhalation technique
Advantage of a spacer
- Slows down particles of the drug and allow more time for evaporation of the propellant so more of the drug can be inhaled
What is the inhaler’s full name
PRESSURISED METERED-DOSE INHALERS
What are dry powder inhaler
- The device releases a small amount of drug in powder form which is inhaled (must have high inspiratory effort)
Pro of nebulisers
No coordination required by user
High dose delivery
Why do inhaled medications have to be done multiple times a day
They are absorbed and cleared from th blood very fast
What characteristics of inhaled drugs allow them to stay in th body for a long time
- SOLUBILITY
- Charge and tissue retention can increase half-life
- Encnapsulation
Advantages of inhaled drugs
- RAPID ABSORPTION
- LARGE SA
- NON-INVASIVE
- FEW METABOLISING ENZYMES
How do B2 adrenoceptor agonists work (2)
- Smooth muscle relaxation
2. Inhibit histamine release by mast cells
What drug is given when bronchoconstriction is being caused by parasympathetic nerve stimulation
ATROPINE
In what conditions are glucocorticoids (corticosteroids) not given and why
INEFFICIENT: COPD. CF and IPF
What ICS is commonly used
BECLOMETASONE DIPROPIONATE
Why are SABAs given alongside ICS
- ICS increases transcription of B2 receptors and B2 agonists increase translocation of GR from cytoplasm to nucleus
What condition is bronchiectasis associated with
CF
What antifriobtic medication is given in IPF
- PIRFENIDONE
2. NINTEDANIB
How does PIRFENIDONE work
REDUCES:
- Fibroblast proliferation
- Collagen production
- Production of fibrogenic mediators