Respiratory Flashcards
Indications for VATs
Lobectomy (could have normal chest examination if old) or wedge resection
Decortication
Bullectomy or pleurectomy (for recurrent pneumothorax)
Lung biopsy
Scars seen in VATs
3 scars - larger 3-6cm on lateral chest wall and 2 smaller for instruments in triangle
Sometimes only 2 or 1 scar
Types of lung cancer
Small cell (SIADH, ectopic ACTH, lambert eaton) Non small cell - usually adenocarcinoma (peripheral, non smokers), squamous cell carcinoma (central, smoking, hypercalcaemia due to ectopic ACTH), large cell, neuroendocrine, broncheoalveolar
Investigation of lung cancer
Full history and obs
Bloods - fbc CRP (anaemia, infection), LFT (mets), kidney (treatment, hyponatraemia - SIADH SCLC), clotting (intervention), hypercalcaemia (bony mets or paraneoplastic)
Sputum analysis
CXR
Staging CTCAP, PET CT for SCLC if radically treatable
Tissue diagnosis - bronchoscopy or endobronchial US, percutaneous via radiologist, mediastinoscopy, or biopsy/FNA LN or pleural effusion aspirate
Work up for treatment - spirometry, lung function with transfer factor, walk test or cardiopulmonary exercise test, echo
Treatment of lung cancer
Depends on cancer stage and histology in conjunction with patient wishes and co-morbidities/performance status. MDT approach.
SCL- usually disseminated by diagnosis so often aren’t amenable to surgery. Chemo and radiotherapy.
NSC - depending on location/stage, often treated with surgery or radical radiotherapy. If more advanced, chemotherapy/radiotherapy may be needed
Supportive - stop smoking
Medical - chemo
Surgical - lobectomy, pneumonectomy
Bilateral scars ?apical
Bilateral pleurectomy for recurrent pneumothoraces
Bilateral bullectomy/lung reduction surgery in COPD
….
?tb treatment in older pt
Treatment for COPD
Stop smoking
Pulmonary rehab
SABA -salbutamol
LABA - salmeterol
SAMA - ipratropium
LAMA -tiotoprium
Lobectomy/pneumonectomy indications
Smoking related disease
Lung cancer resection - likely early non small cell lung cancer (squamous cell in smoker, adenocarcinoma in non smokers). Needs FEV1 >1.
Malignant nodules
Lung abscess (lobectomy or wedge resection)
Localised bronchiectasis (lobectomy or wedge resection)
TB historically
Lung trauma with significant damage
Pneumonectomy over lobectomy if pathology in upper and lower lobes
Primary vs secondary spontaneous pneumothora
Primary - otherwise healthy person
Secondary - underlying lung disease
Initial management of pneumothorax
ABCD, senior help
Primary - aspirate up to 2.5L, can be discharged if symptom relief and residual <2cm, if not then chest drain needed
Suction in pneumothorax
Rarely used due to risk of re-expansion pulmonary oedema
VATs vs open thoracotomy
VATs - less invasive, lower risk of ongoing pain, wound infection and associated with earlier hospital discharge.
But risk of recurrent pneumothorax (worse than thoracotomy) 5% vs 1%
Management of recurring pneuomothorax
If recurrent or persistent air leak..
Pleurectomy or pleurodesis
Bullectomy if bullae or blebs
Differentials of polyphonic wheeze
Asthma
COPD
Pulmonary oedema
Investigations in asthma
Full history
Obs - sats
Bedside - PEFR (diary and diurnal variation - poor control, reduction in early morning), spirometry
Bloods - fbc, ues, crp, ABG in acute setting (?infection, eosinophils), IgE
Triggers - skin prick tests for allergens, RAST bloods
Imaging - CXR
Spirometry in asthma vs COPD
Both obstructive - reduced FEV1, preserved FVC and reduced ratio
Asthma - reversible obstruction, improvement following bronchodilator, 200mls FEV1 or 15% improvement in comparison to baseline. Can be normal in well controlled asthma.
COPD - fixed airflow obstruction
Asthma treatment
Stepwise approach SABA ICS Combined ICS + LABA Montelukast Oral steroids, refer to respiratory specialists
Causes of airflow obstruction
Asthma
COPD
Bronchiectasis
Obliterative bronchiolitis (fixed airflow obstruction, viral, pollutants, GvsH reaction particularly in lung transplant)
Obstructing mass (luminal, extraluminal, foreign body) - likely monophonic wheeze
Presenting interstitial lung disease
Find bibasal/apical end expiratory crackles
Other signs: finger clubbing (IPF), dyspnoea, oxygen, AF/PPM (?amiodarone)
Comment on signs of connective tissue disease (R.A, S.S, SLE)
Most likely cause - ?IPF
Causes of bibasal creps
Interstitial lung disease - fine
Bronchiectasis - coarse
Bilateral pneumonia
Congestive heart failure - peripheral oedema, JVP
Investigations in interstitial lung disease
- Full history
- Obs - sats
- Bloods - fbc (anaemia, infection), renal and liver function (for starting meds), ?CTD (AI screen i.e. RF, dsDNA, ANA, ANCA), ABG (?LTOT), allergy testing (avian precipitins in bird fanciers lung)
- Imaging - CXR, high resolution CT (honey combing = fibrosis, ground glass = alveolitis, fibrosis), echo (pulmonary hypertension), spirometry (normal or restrictive. reduced FEV1 and FVC, preserved ratio, reduced TLC and transfer factor)
- Bronchoscopy with BAL
- Transbronchial or surgical lung biopsy
Treatment of ILD
MDT - PT/OT, respiratory and oxygen nurses to improve QoL, rheumatologist (?CTD), physicians, surgeons
Pulmonary rehab
DMARD for CTD
Steroids/immunosuppressive therapy if ground glass/non specific interstitial pneumonia
If IPF - antifibrotic agent (perfenidone and nintedanib)
FVC 50-80% predicted referral to specialist centre for antifibrotics
Referral for lung transplant if no CI
Tertiary centre - MDT to review investigations i.e. HRCT so try to ascertain underlying aetiology
Causes of ILD
Diffuse parenchymal lung disease
Apical = inhalation - TRASHE - TB, Radiation, Ankspond/ABPA, Sarcoidosis, Histoplasmosis, Extrinsic allergic alveolitis
Basal - CAUD - CTD, Asbestosis, UIP (IPF), Drug induced
Idiopathic - IPF (>45, clubbing), sarcoidosis, COP
Allergies - EAA i.e. bird fanciers lung
Occupational - asbestosis, silicosis
CTD - RA, SLE, dermatomyositis, S.S, polymyositis, MCTD
Drugs - amiodarone, nitrofurantoin, methorexate, chemotherapy
Prognosis in IPF
Median survival 2 yrs from diagnosis
Poor prognostic factors - older age, dyspnoea, low or declining pulmonary function, emphysema, low ET, exertional desaturation