Respiratory Flashcards
COPD general management?
- Smoking cessation = NRT, varenicline or bupropion-often in combo with behavioural support.
- Annual influenza vaccination
- One-off pneumococcal vaccination
- Pulmonary rehab for functionally disabled (MRC >=3)
COPD medication management?
- SABA/SAMA 1st line
- Next determine if asthmatic features/steroid responsiveness
Asthmatic/steroid responsive features?
- Any previous, confirmed Dx of asthma or atopy (eczema allergic rhinitis)
- Raised eosinophils
- Substantial FEV1 variation (>400ml): A significant improvement in Forced Expiratory Volume in 1 second (FEV1) following bronchodilator therapy (e.g., >400 mL increase) suggests reversible airway obstruction typical of asthma.
- Substantial diurnal variation in PEF (at least 20%)
(Don’t recommend formal reversibility testing): implies that current guidelines may discourage the routine use of formal bronchodilator reversibility testing in certain populations, as other clinical and diagnostic criteria (e.g., eosinophils, FEV1, PEF variability) may suffice to establish the diagnosis.
No asthmatic features/steroid responsiveness?
- LABA + ICS
- Triple therapy = LAMA + LABA + ICS
Oral theophylline mushkies?
- Only after trials of SA and LAs or to people who cannot use inhaled therapy
- Dose reduced if macrolide or fluoroquinolone Abx co-prescribed
COPD oral prophylactic antibiotic therapy mushkies?
- Azithromycin in select patients
- Not smoke, optimised Rx, continue to have exacerbations
- Need CT thorax to exclude bronchiectasis ad sputum culture to rule out atypicals + TB
- LFT and ECG as azithromycin can prolong QT interval
COPD and mucolytics?
Considered in pts with chronic productive cough and continued if symptoms improve
Cor pulmonale mushkies?
- Features = peripheral oedema, raised JVP, systolic parasternal heave, loud P2
- Use loop diuretic for oedema, consider LTOT
- ACEi, CCB and alpha blocker not recommended
Factors which improve survival in stable COPD?
- Smoking cessation
- LTOT if fit criteria
- Lung volume reduction surgery in some
Acute bronchitis definition?
Self-limiting chest infection as a result of inflammation of the trachea and major bronchi and is therefore associated with oedematous large airways and the production of sputum. The disease course usually resolves before 3 weeks, however, 25% of patients will still have a cough beyond this time. Although there is uncertainty in the literature regarding the exact proportion of pathogens giving rise to acute bronchitis, it is accepted that viral infection is the leading cause. Around 80% of episodes occur in autumn or winter.
Acute bronchitis presentation?
- Cough = productive/non-productive
- Sore throat
- Rhinorrhoea
- Wheeze
- Some = low grade fever
Differentiating acute bronchitis from pneumonia?
- Hx = sputum, wheeze and breathlessness may be absent in bronchitis but is usually present in pneumonia
- Ex = No focal chest signs in acute bronchitis other than wheeze
Acute bronchitis Dx?
Clinical (but CRP also helpful)
Acute bronchitis Rx?
- Usually conservative
- Abx if = systemically very unwell, pre-existing co-morbidities, CRP 20-100 (delayed prescription) or CRP >100
Acute bronchitis Abx?
Doxycycline 1st line (Amoxicillin 2nd line)
Smoking cessation general points?
- NRT or Varenicline or Bupropion
- Target stop date –> 2 more weeks of NRT, 3-4 more weeks of V/B prescription given –> further prescription only given to those who have demonstrated their quit attempt is continuing
- If unsuccessful do not offer repeat prescription within 6 months unless special circumstances
- Do not offer combination of them
NRT s/e?
- N&V
- Headaches
- Flu-like symptoms
NRT for high level of dependence/have found single forms of NRT inadequate in the past?
Combination of nicotine patch and another form of NRT
Varenicline MOA?
Nicotinic receptor partial agonist
Varenicline mushkies?
- Should be started 1 week before the patients target date to stop
- Recommended course of Rx is 12 weeks
- More effective than bupropion
- Nausea is most common s/e, others = headache, insomnia, abnormal dreams
- Caution in pts with Hx of depression or self harm
- C/I in pregnancy and breastfeeding
Bupropion MOA?
Norepinephrine and dopamine reuptake inhibitor, and nicotinic antagonist
Bupropion mushkies?
- Start 1-2 weeks before target date to stop
- 1/1000 risk of seizures
- C/I in epilepsy, pregnancy and breast feeding
- Having an eating disorder is a relative contraindication
Pregnant women referral for smoking cessation crieteria?
- All women who smoke
- Stopped smoking in last 2 weeks
- CO reading of 7ppm or above (all pregnant women should be tested using carbon monoxide detectors)
Pregnant women smoking cessation interventions?
- CBT, motivational interviewing, structured self help and support
- NRT can be used if above measures fail, should remove patches before bed
- Varenicline and Bupropion are contraindicated
RhA respiratory problems?
- Pulmonary fibrosis, pleural effusion
- Pulmonary nodules, bronchiolitis obliterans
- Complications of drug therapy
- Pleurisy
- Atypical infections
- Caplan’s syndrome = massive fibrotic nodules with occupational coal dust exposure
Most common COPD exacerbation causes?
- Haemophilus influenzae (most common)
- S. pneumoniae
- M. catarrhalis
Acute exacerbation of COPD Rx?
- Increase bronchodilator frequency and consider nebuliser
- Prednisolone 30mg 5 days
- Oral Abx if purulent sputum or clinical signs of pneumonia = Amoxicillin/Clarithromycin/Doxycycline
Acute asthma classification?
- Moderate
- Severe
- Life threatening
Moderate acute asthma?
- PEFR 50-75%
- RR < 25
- HR < 110
- Speech normal
Severe acute asthma?
- PEFR 33-50%
- RR > 25
- HR > 110
- Can’t complete sentences
Life-threatening acute asthma?
- PEFR < 33%
- SpO2 < 92%
- Normal pCO2
- Silent chest, cyanosis, or feeble respiratory effort
- Bradycardia, dysrhythmia or hypotension
- Exhaustion, confusion or coma
Near-fatal asthma?
Raised pCO2 and/or requiring mechanical ventilation with raised inflation pressures
Acute asthma when is ABG indicated?
SpO2 < 92%
Acute asthma who needs admission?
- All pts with life-threatening
- Severe if they fail to respond to initial treatment
- Others = previous near-fatal, pregnancy, attack occurring despite using oral corticosteroid and presentation at night
Acute asthma Rx?
- O2
- SABA e.g. salbutamol
- Prednisolone 40mg 5 days
- Ipratropium
- IV MgSO4
- IV Aminophylline
- ITU/HDU = I&V, ECMO
Asthma criteria for discharge?
- Been stable on their discharge medication (no nebulisers or oxygen) for 12-24 hours
- Inhaler technique checked and recorded
- PEF > 75% of best or predicted
Lung abscess pathophysiology?
- Most commonly secondary to aspiration pneumonia
- Others = haematogenous (IE), direct (empyema), bronchial obstruction (tumour)
- Typically polymicrobial
- Monomicrobial = S. aureus, K. penumonia, P. aeruginosa
Lung abscess features?
Subacute, fever, night sweats, weight loss, foul smelling sputum, possible clubbing
Lung abscess Ix?
- Sputum and blood cultures
- CXR = fluid-filled space within an area of consolidation, air-fluid level seen
Lung abscess Rx?
- IV Abx
- If not resolving percutaneous drainage may be required and in very rare cases surgical resection
Asthma management?
- SABA
- SABA + Low dose ICS
- SABA + Low dose ICS + LTRA
- SABA + Low dose ICS + LABA +/- LTRA
- SABA + Low dose ICS MART +/- LTRA
- SABA +/- Med dose ICS MART +/- LTRA
- SABA +/- LTRA + high dose ICS/theophylline/specialist
When to move straight to step 2 asthma management?
- Not controlled on previous step
- Newly diagnosed asthma with symptoms >=3/week or night-time waking
What is MART?
- Combines ICS + LABA used for both daily maintenance and relief of symptoms
- Only available for ICS and LABA combinations in which LABA has a fast-acting component
Inhaled corticosteroid doses?
- <=400 mcg budesonide = low dose
- 400-800 mcg budesonide = moderate dose
- > 800 mcg budesonide = high dose
Primary pneumothorax?
No underlying lung disease
Primary pneumothorax Rx?
- If <2cm and pt not SOB then consider discharge
- Otherwise, attempt aspiration
- If fails (>2cm or still SOB) then insert chest drain
Secondary pneumothorax Rx?
- > 50 y/o and >2cm and/or SOB then chest drain
- Otherwise attempt aspiration if 1-2cm, if fails (>1cm) then chest drain inserted. All admitted for at least 24 hours
- <1cm = give O2 and admit for 24 hours
Pneumothorax discharge advice?
- Stop smoking
- Flying = 1 week post CXR
- Lifelong scuba diving ban
Obstructive lung disease PFT?
- FEV1 = significantly reduced
- FVC = reduced or normal
- FEV1/FVC = reduced
Obstructive lung disease examples?
- Asthma
- COPD
- Bronchiectasis
- Bronchiolitis obliterans
Restrictive lung disease PFT?
- FEV1 = reduced
- FVC = significantly reduced
- FEV1/FVC = normal or increased
Restrictive lung disease?
- Pulmonary fibrosis, asbestosis, sarcoidosis
- ARDS, Infant RDS
- Neuromuscular disorders, kyphoscoliosis e.g. ankylosing spondylitis
- Obesity
CRB-65?
Used in primary care
- Confusion = AMTS < 8/10
- RR > 30
- BP <90 Systolic or <60 Diastolic
- Age >=65
0 = home
1-2 = consider hospital
3 = urgent hospital
Point of care CRP test for pneumonia?
- <20 = do not routinely offer Abx
- 20-100 = consider delayed Abx
- CRP > 100 = offer Abx
CURB-65?
Secondary care setting
Confusion < 8/10 AMTS
Urea > 7
RR > 30
BP <90 systolic or <60 diastolic
Age >= 65
0-1 = consider home
>=2 = consider hospital
>=3 = consider hospital