Conditions Flashcards
Asthma
= recurrent episodes of dyspnoea, cough and wheeze caused by reversible airway obstruction
Clinical: tachypnoea, audible wheeze, hyperinflated chest, diminished air entry
Ix: PEF, spirometry (normal bloods)
Signs of Severe Asthma Attack
Unable to complete sentances, RR > 25/min
Managment of Chronic Asthma
- SABA
- SABA and ICS
- SABA and ICS and LABA
- If LABA ineffective swap for leukotriene receptor/oral theophylline: if LABA helping, increase dose
- Oral Prednisalone
Management of Acute Asthma Attack
Oxygen (100% non-rebreather mask) Nebulised Salbutamol IV Hydrocortisone OR PO Prednisalone Ipratropium Bromide Theophylline Mag Sulphate (anaesthetist)
COPD
= combined effect of chronic bronchitis and emphysema > characterised by airway obstruction with little or no reversibility
Clinical: chronic dyspnoea, sputum production, wheeze
Ix: pulmonary function tests, show obstructive pattern
Complications: acute exacerbations, infection, respiratory failure, pneumothorax
Management of Chronic COPD
- SAMA
- LAMA
- LAMA and ICS
Management of Acute COPD
- 2-28% oxygen
- High dose salbutamol and ipratropium (nebulized)
- Oral Prednisalone
- Amoxicillin
- Doxapram
May need intubation
Pathology of Bronchiectasis
= chronic infection of the bronchi and bronchioles which leads to localised reversible dilation of the bronchial tree
- The dilated, inflammed bronchi are easily collapsible
Bronchiectasis
Agents: H. influenzae, Strep. pneumoniae, Staph. aureus
Causes: CF, measles, pertussis, bronchiolitis, pneumonia, TB, bronchial obstruction
Clinical: persistent cough, purulent sputum, wheeze, crackles, haemoptysis
Ix: sputum culture, CXR, high resolution CT, spirometry (obstructive pattern)
Management: postural drainage, antibiotics
- Bronchodilators may be useful in COPD and asthma patients
Cystic Fibrosis
= autosomal recessive condition: mutations in the CFTR gene on chromosome
Clinical: failure to thrive
Resp (cough, wheeze, recurrent infections, bronchiectasis, haemoptysis, pneumothorax)
GI (pancreatic insufficiency, gallstones, cirrhosis)
Ix: genetic testing
Managment: regular physiotherapy, prophylactic antibiotics, enzyme replacement
Pulmonary Embolism
= usually as a result of venous thrombus, clots break off and pass through the veins, R side of heart and into pulmonary circulation
Rarer causes: air, fat or amniotic fluid embolism
RF: recent surgery, thrombophilia, fracture, malignancy, previous PE
Clinical Signs and Ix of PE
Clinical: acute breathlessness, pleuritic chest pain, haemoptysis, cyanosis, tachypnoea, pleural rub, hypotension
- Features depend on size/vessel blocked
Ix: Bloods, D-Dimer, ABG, V/Q scan, CT pulmonary angiogram?
Management of PE
Hypoxic = give oxygen Pain = morphine (may need anti-emetic) Critical - immediate thrombolysis (tPa) Not Critical - heparin - LMW heparin - Unfractioned heparin Low Systolic = rapid colloid infusion, dobutamine, (if not given) thrombolysis Good Systolic = start warfarin regimen, confirm diagnosis
Type I Respiratory Failure
Hypoxia with a normal PaCO2 - usually the result of a V/Q mismatch
Causes: pneumonia, PE, asthma, emphysema
Clinical: dyspnoea, restlessness, confusion, central cyanosis
Ix: Bloods, ABG, CXR, blood cultures
Managment: treat underlying cause, high flow oxygen - may need assisted ventilation
Type II Respiratory Failure
Hypoxia with hypercapnia, caused by alveolar hyperventilation
Causes: COPD, asthma, pneumonia, reduced respiratory drive
Clincal: dyspnoea, confusion, headache, tachycardia, coma
Ix: Bloods, ABG, CXR, blood cultures
Management: treat underlying cause, give oxygen with care (e.g. COPD)
Acute Respiratory Distress Syndrome
= lung damage and release of inflammatory mediators causes increased capillary permeability and pulmonary oedema - often accompanied by multi-organ failure
Cause:
Pulmonary (pneumonia, inhalation, injury, aspiration)
Other (shock, sepsis, haemorrhage, ALF, trauma, eclampsia)
Clinical: cyanosis, tachypnoea, tachycardia, bilateral fine crackles
Ix: Bloods (inc FBC and amylase), cultures, ABG, CXR
Management: ICU, supportive therapy ( treat underlying cause)
Management of ARDS
Early: continuous positive pressure ventilator with 40-60% oxygen > most need mechanical ventilation
- Diuretics (-VE fluid balance)
Indication for Ventilation
PaO2 < 8.3 kPa AND/OR PaCO2 > 6kpa
This is DESPITE 60% oxygen
Sarcoidosis
= multisystem granulomatous disease - it is a Type IV hypersensitivity reaction which causes pulmonary fibrosis
- Involves lymph nodes, joints, liver, skin
Clinical: asymptomatic
ACUTE - erythema nodosum which resolves itself
Pulmonary - bilateral hilar lympahdenopathy, infiltrates, dry cough, dyspnoea, chest pain
Ix: CXR, spirometry (restrictive)
Can have raised calcium and LFTs
Management: bed rest, NSAIDs - use of corticosteroids in interstitial lung disease
Interstitial Lung Disease
= collective term for conditions which affect the lung interstitium/parachyma in a diffuse manner
- Characterised by chronic inflammation, progressive fibrosis
Clinical: SOB on exertion, non-productive paroxysmal cough, abnormal breath sounds, abnormal CXR, high resolution CT
Classification of ILD
- Those with known cause
- Those with associated systemic disorders
- Idiopathic
Extrinsic Allergic Alveolitis or Hypersensitivity Pneumonitis
= type III hypersensitivity reaction to inhalation of allergens
ACUTE - alveoli are infiltrated with acute inflammatory cells
CHRONIC - granulomas form > obliterative bronchiolitis
Clinical: cough, breathlessness, fever, crackles, wheeze
- Chronically may have weight loss, increasing dyspnoea
Ix: CXR (upper zone mottling/consolidation), bloods, restrictive changes
- Chronically would show honeycomb lung
Management: removal of antigen, oxygen > oral prednisalone
Causes of EAA/HP
Bird-Fanciers Lung
Pigeon-Fanciers Lung
Farmer’s/Mushroom Worker’s Lung
Malt/Sugar Worker’s Lung
Idiopathic Pulmonary Fibrosis
= a type of idiopathic interstitial pneumonia: it is an inflammatory cell infiltrate and pulmonary fibrosis disorder
Clinical: dry cough, exertional dyspnoea, malaise, weight loss, arthralgia, cyanosis, finger clubbing
Ix: Bloods (ABG), CXR (LOWER zone shadows of honeycomb lung) CT scan, restrictive pattern, lung biopsy
Management: mostly supportive, oxygen, opiates, palliative care
Coal Workers Pneumoconiosis
= inhalation of coal dust particles which are ingested by macrophages
- The death of the macrophages causes fibrosis
CXR: may show round opacities, UPPER zones
Usually asymptomatic
Silicosis
= inhalation of silica particles which are very fibrogenic
Clincal: shows progressive dyspnoea, increased incidence of TB
CXR: miliary or nodular pattern in UPPER zones
- Spirometry shows restrictive defects
Asbestosis
= inhalation of asbestos fibres (blue most fibrogenic)
Clinical: progressive dyspnoea, clubbing, fine crackles
- Can cause pleural plaques, bronchial adenocarcinoma, mesothelioma
Caplan’s Syndrome
Association between rheumatoid arthritis, pneumoconiosis and pulmonary rheumatoid nodules
Pulmonary Oedema
= collection of watery fluid in the lungs making it difficult to breath
Causes: heart failure, high altitude exposure, ARDS, kidney failure, lung damage
Clinical: coughing up blood (pink frothy sputum), PND, shortness of breath
Ix: CXR, echocardiogram, ECG
Managment: treatment of underlying causes, oxygen, loop diuretics, nitrates
Pleural Effusion
= fluid in the pleural space which can be transudate or exudate
Clinical: usually asymptomatic/dyspnoea, pleuritic chest pain, stony dull to percuss, diminished breath sounds, bronchial breathing (if lung compressed)
Ix:
CXR - small effusions blunt angle
Diagnostic aspiration - draw off 10-30ml pleural fluid
Pleural biopsy, ultrasound
Management: treat underlying cause, drainage or pleurodesis (if mesothelioma)
Blood in pleural space
Haemothorax
Pus in pleural space
Empyema
Both blood and air in pleural space
Haemopneumothorax
Transudate
<30g/l Increased venous pressure e.g. cardiac failure, constrictive pericarditis, fluid overload OR Hypoproteinaemia
Exudate
> 30g/l
Increased leakiness of pleural capillaries secondary to infection, inflammation or malignancy
Foul smelling pleural effusion
Anaerobic Empyema
Food particles in pleural effusion
Oesophageal Rupture