Respiratory Flashcards
Where should the needle be inserted in thoracocentesis in tension pneumothorax?
2nd intercostal space, mid-clavicular line
What is the discrepency in NICE and BTS/SIGN guidance for stepwise asthma management?
- NICE: SABA –> low dose ICS –> LTRA trial –> + LABA (fixed dose or MART) –> medium dose ICS –> specialist
- BTS/SIGN: SABA –> low dose ICS –> + LABA (fixed dose or MART) –> medium dose ICS OR LTRA –> specialist
Which type of malignancy is a patient with asbestosis most likely to develop?
lung cancer (NOT mesothelioma)
What are typical findings of asbestosis on lung function tests?
severe restrictive ventilatory defect; reduced gas transfer
What 5 things may be recommended in acute bronchitis (not pneumonia)?
- honey
- pelargonium (herbal medicine)
- cough medicine containing guaifenesin (expectorant)
- cough suppressant (except codeine)
- if abx - doxycycline
What abx do NICE recommend for pneumonia?
- CRB65 0 - amoxicillin
- CRB65 1-2 - amox + clari/erythromycin
How is a diagnosis of TB confirmed?
sputum culture - 3 spontaneous deep cough samples, 1 preferably early morning. send for AFB, mycobacterium culture, genetic testing
What is a ghon focus + ghon complex?
(seen in TB)
ghon focus = initial caseating granulomatous lesion in upper lung lobe
ghon complex = calcified ghon focus + associated mediastinal lymphadenopathy
What is the treatment of active TB?
- RIPE: rifampicin, isoniazid, pyrazinamide, ethambutol 2 months
- continued treatment: RI 4 months
What is the treatment of latent TB?
- rifampicin + isoniazid for 3 months OR
- isoniazid for 6 months
+ give pyridoxine
What may be seen on CXR in asbestosis?
bilateral lower zone interstitial changes, pleural plaques/thickening (may be normal)
Which occupations are at risk of berylliosis?
aerospace, nuclear, telecommunications, semiconductor or electrical industries
What are 3 types of lung disease that beryllium exposure can cause?
- beryllium sensitisation - allergic disease
- acute beryllium disease - acute pneumonitis
- chronic beryllium disease - chronic granulomatous disease similar to sarcoidosis
Which occupation is affected by silicosis?
coal miner (& foundries + sandblasting)
What are 2 types of lung disease coal miners can get?
silicosis, coal workers’ pneumoconiosis
What are 2 types of coal workers’ pneumoconiosis?
- simple coal workers’ pneumoconiosis (asymptomatic)
- progressive massive fibrosis (if associated with RA = Caplan’s syndrome)
What is the management of whooping cough (Bordetella pertussis)?
Azithromycin or clarithromycin if onset within last 21 days; admit infants <6 months. Notifiable disease. Prophylaxis to household contacts
What are the 3 phases of whooping cough?
- Catarrhal phase - similar to viral URTI, 1-2 weeks
- Paroxysmal phase - cough worsens, inspiratory whoop 2-8 weeks
- Convalescent phase - cough subsides over weeks to months
What are the school exclusion rules for whooping cough?
48h after started antibiotics or 21 days after onset of symptoms
What is the vaccination guidance for whooping cough in pregnancy?
All pregnant women 16-32 weeks should be offered vaccine
What is the inheritance pattern of alpha-1 anti-trypsin deficiency?
autosomal recessive / co-dominant
What will an obstructive picture on spirometry (e.g. COPD) show?
reduced FEV1, reduced FEV1/FVC <0.7, normal FVC
How can the liver be affected in A1AT deficiency?
cirrhosis and hepatocellular carcinoma in adults, cholestasis in children
What are the different types of alleles and genotypes for A1AT deficiency?
alleles classified by electrophoretic mobility - M = normal, S= slow, Z = very slow
PiMM = normal
PiMZ = heterozygous
PiSS = 50% normal A1AT levels
PiZZ = 10% normal A1AT levels
What is the pathophysiology of A1AT deficiency?
A1AT is a protease inhibitor normally produced by the liver; protects cells (including alveoli) from enzymes such as neutrophil elastase. When deficient leads to panacinar emphysema most marked in lower lobes
What will chest CT often show in silicosis?
bilateral upper lobe lung nodules and eggshall calcification of lymph nodes
What are 2 cardiac effects of carbon monoxide poisoning?
- tachyarrhythmias
- myocardial ischaemia
What are 5 neurologic changes seen in carbon monoxide poisoning?
- hemi- and monoplegia
- cerebellar signs
- parkinsonism
- akinetic mutism
- coma
What deramtological changes may be seen in carbon monoxide poisoning?
cherry-red colour of the skin and mucosa (not cyanosis)
What are 6 risk factors for COPD?
- tobacco smoking
- occupational exposure - dusts, fumes, chemicals
- air pollution
- genetics - A1ATD
- Lung development - maternal smoking, severe RTI in childhood
- Asthma
How is COPD severity categorised?
- Stage 1 - Mild: FEV1 >80%
- Stage 2 - Moderate: 50-80%
- Stage 3 - Severe: 30-50%
- Stage 4 - Very severe - <30%
What ENT manifestation can occur with Mycoplasma pneumonia?
bullous myringitis
Which atypical pneumonia may be associated with diarrhoea?
Legionella
What is the commonest cause of acute bronchitis?
virus (rhinovirus, enterovirus, influenza, parainfluenza, coronavirus)
What is the recommended antibiotic treatment for low severity CAP?
Amoxicillin first-line - 5 days
What is the management for moderate to high severity CAP?
Amoxicillin + macrolide 7-10 day course (consider co-amoxiclav / ceftriaxone / tazocin if severe)
What are the discharge criteria post admission with CAP?
Delay discharge if have 2 or more in last 24h of:
* fever > 37.5
* resp rate > 24
* HR > 100
* SBP < 90
* sats < 100% RA
* confusion
* unable to eat without assistance
What are 3 factors which may improve survival in COPD?
- Smoking cessation (number 1)
- LTOT
- Lung volume reduction surgery
What is the benefits of ICS therapy in COPD?
Reduces frequency of exacerbations
What are the 2 criteria for considering a PDE-4 inhibitor E.g. roflumilast for COPD?
- Severe COPD - FEV1 after bronchodilator < 50%
- 2 or more exacerbations in past 12 months despite triple therapy with LAMA, LABA and ICS
What are 7 criteria for a patient with COPD to be started on azithromycin prophylaxis?
- don’t smoke
- continued exacerbations
- on optimum standard therapy
- CT thorax to exclude brinchiectasis
- sputum culture to exclude atypical infection and TB
- ECG for QTc
- LFTs
What are 6 CXR findings in mesothelioma?
- obliteration of diaphragm
- nodular thickening of pleura
- decreased size of involved chest
- radiolucent sheetlike encasement of pleura
- loculated effusion >50% of patients
How is a diagnosis of mesothelioma made?
pleural biopsy
What is the management of mesothelioma?
symptomatic only - palliative surgery (extrapleural pneumonectomy, plerectomy + decortication)
What features may be seen on HRCT in IPF?
- bilateral interstitial shadowing - small, irregular, peripheral opacities ‘ground glass’
- progresses to honeycombing
What are 2 blood tests which may be positive in IPF?
- ANA +ve 30%
- RF +ve 10%
What are 4 aspects of the management of pulmonary fibrosis?
- pulmonary rehabilitation
- antifibrotics - pirfenidone, nintendanib
- supplementary O2
- lung transplantation
What are the 3 criteria for a patient with COPD to have a rescue pack (short course oral steroids + oral abx) at home as part of exacerbation action plan?
- 1 exacerbation in last year + remain at risk of exacerbations
- understand + confident re when + how to take, + associated benefits / harms
- know to tell healthcare professional when they have used the medicines, + ask for replacements
What are 4 organisms commonly implicated in bronchiectasis?
- Haemophilus influenzae (most common)
- Klebsiella
- Pseudomonas aeruginosa
- Streptococcus pneumoniae
What is the commonest cause of bronchiectasis today in children + young adults?
cystic fibrosis
What proportion of patients with bronchiectasis have digital clubbing?
50%
What may be seen on CXR in bronchiectasis?
‘tram tracking’ appearance of dilated lower lobe bronchi
What are 7 things that management of bronchiectasis involves?
- prolonged use of antibiotics
- postural drainage + chest physio
- inhaled steroid
- surgery to treat localised bronchiectasis
- antibiotics - exacerbations + long term
- bronchodilators - selected cases
- immunisations
What is the equation used to calculate anion gap?
[sodium + potassium] - [bicarbonate + chloride]
When is an anion gap useful in interpreting ABGs?
metabolic acidosis - normal vs raised have different causes
What are 5 causes of a metabolic acidosis with normal anion gap?
- GI bicarb loss: diarrhoea, ureterosigmoidostomy, fistula
- renal tubular acidosis
- drugs e.g. acetazolamide
- ammonium chloride injection
- Addison’s disease
What are 5 causes of a metabolic acidosis with normal anion gap?
- lactate: shock, hypoxia
- ketones: diabetic ketoacidosis, alcohol
- urate: renal failure
- acid poisoning: salicylates, methanol
- 5-oxoproline: chronic paracetamol use
What is the range for a normal anion gap?
8-14 mmol/L
What is the management of primary pneumothorax?
- if rim of air <2cm and no SOB - consider discharge
- if >2cm OR SOB - needle decompression (aspiration) - if fails chest drain
What is the management of secondary pneumothorax?
- if <1cm - give O2 and admit for 24h
- if rim of air 1-2cm, no SOB - aspiration
- if >2cm or SOB - chest drain