Respiratory đ« Flashcards
What is Samterâs Triad?
Asthma
Aspirin sensitivity
Nasal polyps
Causes of upper lobe fibrosis
CHARTS C- Coal minerâs pneumoconiosis H- Histocytosis / Hypersensitivity pneumonia A- Ankylosing spondylitis R- Radiation T- TB S- Silicosis / Sarcoidosis
What abx combination do you use for TB?
RIPE
Rifampicin
Isoniazid
Pyrazinamide (this is just vit B6, give as Isonazid is B6 inhibitor)
Ethambutol
If active, give all for 2 months, then R + I for 4 months
If latent, give R + I for 2 months
What inhalers can give you oral thrush?
ICS
What is pleurodesis?
A procedure that adheres a lung to your chest wall using a sclerosing agent (like chalk) to prevent fluid or air from continually building up around lungs.
Used for recurrent pneumothoraces or pleural effusions
What is a bleb?
A bleb is a collection of air within the layers of visceral pleura.
*NOTE: in breasts it is a milk blister
What is a transudate?
An effusion containing <30g/L of protein.
Excess fluid production of low protein and low cell count
Occurs in non-inflammatory conditions
What causes transudative pleural effusions?
Increased venous pressure â> heart failure, fluid overload, constrictive pericarditis (push out into pleura)
Low oncotic pressure â> hypoproteinaemia, cirrhosis, nephrotic syndrome, malabsorption (canât pull out of pleura)
Hypothyroidism
What is Meigâs syndrome?
The triad of:
- Ovarian benign tumours causing
- Pleural effusion +
- Ascites
Occurs when the thoracic duct is disrupted and chyle accumulates in the pleural space.
Can be due to trauma or tumours (Chylothorax)
What are exudative effusions?
Effusions containing >30g of protein
EXudate â> EXcess protein
What causes exudative pleural effusion?
Reduced removal of fluid from lymphatic system due to infection/lymphoma
Increased leakiness of pleural capillaries 2* to infection, inflammation or malignancy
Also: pneumonia, TB, SLE, RA, carcinoma or mets
What is the Px of pleural effusion?
- SOB
- Pleuritic chest pain
- Reduced O2
- Cyanotic
- Reduced air sounds
- Stony dull percussion
- Reduced tactile / vocal fremitus
What is the max vol of pulmonary oedema you can remove via pleural tap at once?
2L
Due to risk of re-expansion pulmonary oedema if greater vols
What is re-expansion pulmonary oedema?
An uncommon complication of drainage of a pneumothorax or pleural effusion.
Px: cough, chest discomfort, hypoxaemia. If severe, shock + death.
Usually within 24hrs of thoracentesis
What is a chylothorax?
Occurs when the thoracic duct is disrupted and chyle accumulates in the pleural space due to trauma in the thoracic duct, tumours or TB
Pulmonary oedema Px?
Dyspnoea
Haemoptysis
Bibasal crackles and S3 heart sound
TB Px?
Feer Night sweats Anorexia Weight loss Haemoptysis
What cause of haemoptysis is strongly associated with an acute history of purulent cough?
Lower respiratory tract infection
What type of coughs seen in Bronchiectasis?
Long history of cough and daily purulent sputum production.
May also have haemoptysis.
Px of Aspergilloma (clump of fungus in pre-existing lung cavity - caused by Aspergillus fungi)?
PMH of TB, lung cancer or CF
Cough
Severe haemoptysis
Chest XR shows rounded opacity
Px of Granulomatosis with polyangiitis?
- Upper resp tract: epistaxis, sinusitis, nasal crusting
- Lower resp tract: dyspnoea + haemoptysis
- Glomerulonephritis
- Saddle-shape nose deformity
- Also: vasculitic rash, eye involvement, CN lesions
Goodpastures Px:
- Haemoptysis
- Systemically unwell: fever, nausea
- Glomerulonephritis
If a pt with COPD is breathless on SABA/SAMA + LABA = ICS, what do you do?
Add a LAMA Eg Tiotropium.
What type of drug is Formoterol
LABA
What type of drug is Beclamethasone?
ICS
What do we prescribe as prophylaxis against chest infections in pts with COPD?
Oral Azithromycin
For its on optimum treatment but get frequent infective exacerbations.
When do we give theophylline in COPD pts?
Uncontrolled COPD - only if cannot tolerate inhaled therapy
What is the routine drug management in COPD pts with asthmatic features?
LABA + ICS regularly
SABA or SAMA prn
What is the routine drug management in COPD pts w/o asthmatic features?
SABA prn
LABA + LAMA regularly
What is the FEV1/FVC of a normal lung?
70-80%
In what conditions do you see a raisedFEV1/FVC?
- Pulmonary fibrosis
- Pulmonary oedema
Why do you see a raised total gas transfer (TLCO) in asthma or a left-to-right cardiac shunt?
The problem is not affecting the alveoli directly or gas exchange and so the lungs try to compensate for the problem by improving gas exchange
What are the causes of a raised TLCO (total gas transfer)in pulmonary function tests?
- Asthma
- Pulmonary haemorrhage (Wegenerâs, Goodpastureâs)
- Left-to-right cardiac shunts
- Polycythaemia
- Hyperkinetic states
- Male + exercise
What are the causes of a low TLCO (total gas transfer)in pulmonary function tests?
- Pulmonary fibrosis
- Pneumonia
- Pulmonary embolism
- Pulmonary oedema
- Emphysema
- Anaemia
- low CO
What is Granulomatosis with polyangiitis (Wegenerâs granulomatosis)?
An autoimmune condition assoc. with necrotising granulomatous vasculitis, affecting upper + lower resp tracts + kidneys.
Granulomatosis with polyangiitis (Wegenerâs granulomatosis) Ix results?
- cANCA +ve
- CXR: caveatting lesions
- Renal biopsy: epithelial crescents in Bowmanâs
Granulomatosis with polyangiitis (Wegenerâs granulomatosis) Rx?
- Steroids
- Cyclophosphamide
- Plasma exchange
What is Bronchiectasis?
Bronchiectasis is a permanent dilation of the airways secondary to chronic infection or inflammation.
What are the causes of Bronchiectasis?
- Post-infectie: TB, measles, pertussis, pneumonia
- Cystic fibrosis
- Bronchial obstruction Eg lung ca
- IgA immunodeficiency
- Hypogammaglobulinaemia
- Allergic bronchopulmonary aspergillosis (ABPA)
- Yellow nail syndrome
- Youngâs syndrome
- Kartagenerâs syndrome
What is the management of Bronchiectasis?
- Inspiratory muscle training
- Postural drainage
- Abx for exacerbations
- Surgery in localised dx
Common infection causative organisms in pts wit Bronchiectasis?
- H. Inflenzae (most common)
- Pseudomonas aeruginosa
- Klebsiella spp- Streptococcus pneumoniae
What is Kartagenerâs syndrome?
AKA Primary Ciliary Dyskinesia.
Immotile cilia.
Associated with dextrocardia (often described in Qs as âquiet heart soundsâ and âsmall volume complexes in lateral leadsâ)
What are the features of Kartagenerâs syndrome?
- Dextrocaria or complete situs inversus
- Bronchiectasis
- Recurrent sinusitis
- Subfertility (2* traduced spermmotility + defective ciliary action in Fallopian tubes)
What is Allergic Bronchopulmonary Aspergillosis?
Results from an allergy to Aspergillus spores.
Often have history of Bronchiectasis and eosinophilia.
Rx of Allergic Bronchopulmonary Aspergillosis?
Oral glucocorticoids
Itraconazole is 2nd line
What is Whooping cough (pertussis)?
Pertussis is an infectious dx caused by the Gram -ve bacterium Boretella pertussis.
Typically presents in kids.
When are children vaccinated against Whooping cough (pertussis)?
2,3,4 months and 3-5yrs
What is the diagnostic criteria for Whooping cough (pertussis)?
If a pt has an acute cough for over 14 days w/o apparent cause + 1 or more of the following:
- Paroxysmal cough
- Inspiratory whoop
- Post-tussive (post-cough) vomiting
- Undiagnosed apnoea attacks in young infants
Management of Whooping cough (pertussis)?
- Admit if <6months old
- Oralmacrolide (Eg Clarithromycin) if onset within 21 days
- Household given prophylactic abx
Complications of Whooping cough (pertussis)?
- Subconjunctial haemorrhage
- Pneumonia
- Bronchiectasis
- Seizures
What are the pulmonary function test results in obstructive lung dx?
FEV1 - significantly reduced
FVC - reduced or normal
FEV1% (FEV1/FVC) - reduced
What are the pulmonary function test results in restrictive lung dx?
FEV1 - reduced
FVC - significantly reduced
FEV1% (FEV1/FVC) - normal or increased
What are the most common bacterial organisms that cause infective exacerbations of COPD?
- H.Influenzae (most common)
- Streptococcus pneumoniae
- Moraxella catarrhalis
What abx do you give in infectious exacerbations of COPD?
Amoxicillin or Clarithromycin or Doxycycline
*NOTE: only give if purulent sputum orclinical signs of pneumonia