Respiratory Flashcards
Bronchiectasis - CXR
- Dilated bronchi
- Thickened walls (tramline and ring shadows)
- Multiple cysts containing fluid - cystic shadows
Hospital acquired pneumonia - causative organisms
- Aerobic Gram -ve bacilli
- Pseudomonas Aeruginosa
- Escherichia coli
- Klebsiella Pneumoniae - Staphylococcus aureus (gram +ve cocci)
Staff = Staph
Pulmonary embolism - Treatment
- High flow Oxygen (60-100%)
- LMWH (Enoxaparin/Dalteparin)
- Thrombolysis if severe (altepase)
- Vit K antagonist for prevention (Warfarin) - slower
- Surgical embolectomy
Pulmonary TB - laryngeal involvement
Hoarse voice
Goodpasture’s Syndrome - Definition
Co-existence of acute glomerulonephritis and pulmonary alveolar haemorrhage.
Circulating antibodies directed against intrinsic antigen kidney/lung bm.
Type II hypersensitivity reaction.
TB - Histology
- Caseating granuloma - central area of necrosis, surrounded by epitheliod histocytes and Langhans giant cells (multiple nuclei).
Both cells from macrophage
TB - Treatment
RIPE
- Rifampicin - 6mths
- Orange discolouration of urine - Isoniazid - 6mths
- Neuropathy - Pyrazinamide - 2mths
- Arthralgia - Ethambutol - 2mths
- Optic neuritis - Fluroquinolones if resistance
Sarcoidosis- Definition
Interstitial lung D
Cellular infiltrates and extracellular matrix deposition in lung distal to terminal bronchiole.
Dry cough and increased ACE (due to granuloma)
Pulmonary hypertension - definition
mPAP (mean pulmonary arterial P) above 25mmHg as measured at R heart catheterisation and 2ndary RV failure
Pulmonary hypertension - X ray
- Enlarged proximal pulmonary A - taper distally
- Cardiomegaly (RA)
- Reveal cause (emphysema / calcified mitral valve)
- Lucent lung fields
- Elevated cardiac apex (RV hypertrophy)
Chemotherapy - SE
- Alopecia
- Fatigue
- N+V
- C/D
- Rash
Pleural effusion w exudate - causes
- Malignancy
- Infection
- Inflammatory
Non-small cell carcinoma - types
- Squamous carcinoma
- Adenocarcinoma (C)
- Large cell and differentiated carcinoma
- Carcinoid tumours
COPD - conditions
- Chronic bronchitis
- Emphysema
Alpha-1 antitrypsin deficiency predisposes to COPD
Pulmonary embolism - Plasma D dimer
- See Haem
2. -ve = rules out PE –> no imaging needed
TB - microbiology
- Mycobacterium tuberculosis (C)
2. Ziehl Neelson Stain +ve
Community acquired pneumonia - CURB 65
C - Confusion U - Urea >7mmol/L R - RR >30/min B - BP <90 (S) +/or 60 (D) 65 - Age > 65 1 point each 0-1 = mild, 2 = mod (admit to hospital), 3-5 = severe, 4-5 = critical care unit
Community acquired pneumonia - Treatment
- Amoxicillin (mild)
- Clarithromycin / co-amoxiclav (severe)
- Maintain O2 sats
- Analgesia - pleuritic pain
Bronchiectasis - clinical presentation
- Chronic cough
- Foul smelling purulent sputum
- Dyspnoea
- Clubbing
- Haemoptysis
Extrinsic allergic alveolitis - Treatment
- Remove allergen
- Give O2
- Oral prednisolone
Asthma - Airway narrowing
- Inflammation of mucosa
- SM contraction - bronchoconstriction
- Increased mucus production
Asthma - Short acting Beta agonists (SABA)
- Salbutamol
- Binds to B2 adrenoreceptors
- SM relaxation
- Bronchodilation
Cystic fibrosis - Diagnostic tests
- Sweat test (Na and Cl conc >60mmol/L)
- Genetics screening
- Faecal elastase test - exclude pancreas D (elastase produced by pancreas and found in faeces) CF - no elastase as mucus blocks release
Pulmonary embolism
- Sudden unexplained dysponea
- When infarction - pleuritic chest pain (on inspiration) and haemoptysis
- Dizziness
- Pyrexia
- Cyanoisis
Community Acquired Pneumonia - causative organism
- Strep pneumoniae (C)
- Legionella spp
- Haemophilius influenzae (vaccine)
- Mycoplasma pneumoniae
Hypersensitivity reactions
ACID
I = Allergic (anaphylaxis
II = Cytotoxic (antibody against collagen - GPS)
III = Immune complex deposition (IgG/IgM - SLE)
IV = Delayed (Graft rejection)
Lung cancer - Metastasis
- Adrenal glands
- Bone
- Brain
- Liver
TB - X ray
- Patchy/nodular shadows in upper zone
- Loss of volume
- Fibrosis
- W or w/out cavitation
- Consolidation
Pneumonia - X ray
- Air bronchogram in consolidated A (black branch)
2. Abnormalities can lag behind clinical signs - repeat 2-3 days
Values
FEV1 = forced expiratory V in 1s - >80% than predicted values = normal FVC = forced vital capacity - amount of air forcibly expired - >80% predicted valuee = normal - Low = airway restriction FEV1/FVC ration - Below 0.7 = obstruction - Normal w low FVC = respiratory
Type 1 respiratory failure
- pO2 low
- pCO2 norma
1 change - PE
Type 2 respiratory failure
- pO2 low
- PCO2 high
2 changes - Hypoventilation
Obstructive
- Asthma
- Variable airflow obstruction
- Reversible - COPD
- Fixed airflow obstruction
- Mix of R + O
Restrictive
- Lung V small -> most of breath out in 1st sec
- Interstitial lung D
- Sarcoid
- Fibrosing alveolitis
COPD - Presentation
1. Productive cough w white/clear sputum (smokers cough) 2. Wheeze 3. Breathlessness at rest 4. Prolonged expiration 5. Poor chest expansion 6. Hyperinflated (barrel chest)
COPD - Stages
- FEV1 <80%
- FEV1 50-79%
- FEV1 30-49%
- FEV! <30%
Asthma - types
- Allergic/eosinophilic 70%
- Allergens + atopy - Non-allergic/ non-eosinophilic 30%
- Exercise, cold air and stress
- Smoking and non smoking associated
- Obesity
Asthma - immediate management
- O2 therapy
- Nebulised 5mg salbutamol
- Prednisolone
- ABG
- PEFR
Asthma - inhaled corticosteroids examples
Prednisolone
Beclomatasone
Budesonide
Good pasture’s Syndrome - Diagnosis
- Anti-basement membrane antibodies
- CXR
- Transient patchy shadows
- Pulmonary inflitrates - due to pulmonary haemorrhage in lower zones - Crescentic glomerulonephritis in biopsy
Asthma - symptoms
- Intermittent dysponea
- Wheeze
- Nocturnal cough
- Sputum
- Worse at night
Asthma - Signs in attack
- Tachypnoea
- Reduced chest expansion
- Cyanosis
- Silent chest
- Bradycardia
Asthma - Treatment
- Short acting Beta 2 agonist (salbutamol)
- Inhaled corticosteroids
- Long acting Beta 2 agonist (salmeterol)
- Anti-IgE monoclonal antibody (omalizumab)
TB - Systemic features
- Weight loss
- Low grade fever
- Anorexia
- Night sweats
- Malaise
TB - Prevention
- Active case finding
- Mantoux test - Neonatal BCG