Respiratory Flashcards
FEV1 in obstructive lung disease
Significantly reduced
FVC in obstructive lung disease
reduced or normal
FEV1% in obstructive lung disease
reduced
Examples of obstructive lung disease
Asthma
COPD
Bronchiectasis
Bronchiolitis obliterans
Pulmonary function tests in obstructive lung disease
FEV1 - reduced
FVC - reduced or normal
FEV1% - reduced
FEV1 in restrictive lung disease
reduced
FVC in restrictive lung disease
significantly reduced
FEV1% in restrictive lung disease
normal or increased
Examples of restrictive lung disease
pulmonary fibrosis asbestosis sarcoidosis ARDS infant respiratory distress kyphoscoliosis neuromuscular disorders severe obesity
Pulmonary function tests in restrictive lung disease
FEV1 - reduced
FVC - reduced
FEV1% - normal or increased
COPD causes
Smoking Alpha-1 antitrypsin deficiency Cadmium Coal Cotton Cement
Cardiac causes of clubbing
Cyanotic heart disease
Bacterial endocarditis
Atrial myxoma
Respiratory causes of clubbing
Lung ca Cystic fibrosis Bronchiectasis Empyema TB Asbestosis, mesothelioma Fibrosing alveolitis
What did Eosinophilic granulomatosis with polyangiitis used to be called?
Churg Strauss syndrome
What is Eosinophilic granulomatosis with polyangiitis?
ANCA associated small vessel vasculitis
Features of eosinophilic granulomatosis with polyangiitis
Asthma Eosinophilia >10% Paranasal sinusitis Mononeuritis multiplex pANCA positive
Features of klebsiella pneumonia
Occurs in alcoholics and diabetics
May occur after aspiration
Red-currant jelly sputum
Often affects upper lobes
Complications and prognosis of klebsiella pneumonia
Causes lung abscesses and empyema
30-50% mortality
Respiratory manifestations of rheumatoid arthritis
Pulmonary fibrosis
Pleural effusion
Pulmonary nodules
Bronchiolitis obliterans
Is coal dust a risk factor for lung cancer?
No
What is bronchiectasis?
Permanent dilation of the airways secondary to chronic infection or inflammation
Management of bronchiectasis
Physical training Postural drainage Antibiotics for exacerbations Bronchodilators Immunisations Surgery in some cases
Preventing acute mountain sickness
No increase in altitude more than 500 metres per day
Acetazolamide
Treatment of acute mountain sickness
Descent
Presentation of high altitude cerebral oedema
Headache
Ataxia
Papilloedema
Treatment of high altitude pulmonary oedema
Descent Oxygen Nifedipine Dexamethasone Acetazolamide
Treatment of high altitude cerebral oedema
Descent
Dexamethasone
Three most common causes of infective exacerbations of COPD
1) Haemophilus influenzae
2) Streptococcus pneumoniae
3) Moraxella catarrhalis
Management of acute exacerbation of COPD
Increase bronchodilator frequency
30mg pred for 5 days
Antibiotics if purulent sputum or clinical signs of pneumonia
Antibiotics for acute exacerbations of COPD
Amoxicillin or clarithromycin or doxycycline
In which cases of otitis media should antibiotics be immediately precribed?
Children <2 with bilateral acute otitis media
Children with otorrhoea and acute otitis media
In which cases of sore throat should antibiotics be immediately prescribed?
3 or more centor criteria
Centor criteria
Presence of tonsillar exudate
Tender anterior cervical lymphadenopathy or lymphadenitis
History of fever
Absence of cough
How long does acute otitis media generally last?
4 days
How long does acute sore throat/tonsillitis/pharyngitis generally last?
1 week
How long does the common cold generally last?
1.5 weeks
How long does acute rhinosinusitis generally last?
2.5 weeks
How long does acute cough/acute bronchitis generally last?
3 weeks
Why do we give antibiotics if the centor criteria gives a score of 3?
40-60% chance sore throat is caused by group A beta haemolytic streptococcus
Criteria for moderate acute asthma
PEFR 50-75% best or predicted
Speech normal
RR <25
Pulse <110
Criteria for severe acute asthma
PEFR 33-50% best or predicted
Can’t complete sentences
RR >25
Pulse >110
Criteria for life threatening acute asthma
PEFR <33% best or predicted Oxygen <92 Silent chest, cyanosis or poor resp effort Bradycardia, dysrhythmia or hypotension Exhaustion, confusion or coma
Criteria for near fatal acute asthma
Normal or raised pCO2
Requiring mechanical ventilation
Management of acute asthma
Oxygen Bronchodilators via neb 40-50mg prednisolone daily Ipratropium bromide IV magnesium sulphate IV aminophylline ITU options = ventilation, ECMO
Asthma - when is reversibility testing positive?
Adults = improvement in FEV1 of 12% and increase in volume of 200ml
Children = improvement in FEV1 of 12%
Asthma - when is FeNO considered positive?
Adults = ≥40 parts per billion
Children = ≥35 parts per billion
Recommendations from the national review of asthma deaths
Refer secondary care if >2 courses systemic steroids in 1 year
Urgent review if 12+ salbutamol in 1 year
Assess and document inhaler technique
Encouraged combination inhalers
Poor compliance with ICS suggested poor control
Most common cause of occupational asthma
Isocyanates found in spray painting and foam moulding
How to reduce the dose of ICS in asthma
By 25-50% at a time
What is considered low dose ICS?
<400 micrograms budesonide
What is considered medium dose ICS?
400 to 800 micrograms budesonide
What is considered high dose ICS?
> 800 micrograms budesonide
Criteria for starting azithromycin in COPD
Not smoking
Optimised standard therapy
Continue to have exacerbations
What investigations are done prior to starting azithromycin in COPD?
CT thorax to exclude bronchiectasis
Sputum culture to exclude atypical infections and TB
ECG to exclude QT prolongation
Which FEV1 values should prompt assessment for LTOT in COPD?
FEV1 <30%
Consider if 30-49%
Which clinical findings should prompt assessment for LTOT in COPD?
Cyanosis Polycythaemia Peripheral oedema Raised JVP O2 sats <92%
How should adults with suspected asthma be investigated?
FeNO and spirometry/bronchodilator reversibility testing
Features suggesting that a patient with COPD has asthma or steroid responsive features
Asthma or atophy diagnosis
High blood oesinophil
Substantial variation in FEV1 over time
Substantial diurnal variation in peak expiratory flow (20+%)
What are the CURB65 criteria?
Confusion Urea >7 Resp rate ≥30 BP <90 systolic and/or <60 diastolic Age ≥65
Acute bronchitis - features
Cough - may or may not be productive
Sore throat
Rhinorrhoea
Wheeze