Respiratory Conditions A Flashcards
Chronic Brochitis - Description
progressive irreversible airway obstruction due to mucus hypersecretion, type of COPD
Chronic Brochitis - Risk Factors (6)
1) smoking
2) age
3) genetics
4) air pollution (e.g. S2, NO2)
5) work pollution (e.g. mining)
6) Caucasian
Chronic Brochitis - Pathophysiology (7)
1) exposure to irritants and chemicals
2) inflammation
3) hypertrophy and hyperplasia of mucus secreting goblet cells
4) mucus hypersecretion
5) airway obstruction
6) alveoli hypoxia
7) decreased gas exchange
Chronic Brochitis - Pathophysiology (Blue Bloater) (5)
1) alveoli hypoxia
2) renal hypoxia
3) increased EPO secretion —> polycythaemia
4) increased renin secretion —> fluid retention
5) cyanosed and bloated
Chronic Brochitis - Symptoms (3)
1) productive cough (more than emphysema)
2) wheeze
3) cachexia (wasting syndrome: anorexia, weight loss, muscle atrophy, fatigue)
Chronic Brochitis - Signs (4)
1) cyanosis
2) coarse rales (abnormal crackling lung sounds)
3) high JVP
4) peripheral oedema
Chronic Brochitis - Complications (5)
1) pulmonary hypertension —> cor pulmonale
2) type II respiratory failure
3) pneumonia
4) lung malignancy
5) polycythaemia
Chronic Brochitis - Investigations (5/2)
initial 1) spirometry (FEV1<0.8, FEV1/FVC<0.7) 2) pulse oximetry (low) 3) ABG (PaO2<8kPa ± PaCO2>6.7kPa) 4) FBC (high PCV) 5) ECG (RVH) consider 1) chest x-ray (exclusion) 2) chest CT (bronchial wall fibrosis)
Chronic Brochitis - Management (3/6/0)
conservative
1) smoking cessation
2) pulmonary rehabilitation (inc. exercise, education, breathing techniques)
3) vaccinations (annual influenza, pneumococcal)
medical
1) LAMA
2) SAβA (as required)
3) INH corticosteroid (severe)
4) long term domiciliary oxygen therapy (severe, non-smokers)
5) antimucolytic
6) diuretic (oedema)
Emphysema - Description
progressive irreversible airway obstruction due to acinar elastin breakdown, type of COPD
Emphysema - Risk Factors (6)
1) smoking
2) age
3) genetics (e.g. alpha-1-antitrypsin-deficiency)
4) air pollution (e.g. S2, NO2)
5) work pollution (e.g. mining)
6) Caucasian
Emphysema - Pathophysiology (8)
1) exposure to irritants and chemicals
2) inflammation
3) neutrophil elastase breaks down airway elastin
4) decreased airway elasticity
5) airway expansion on inhalation —> decreased gas exchange surface
6) airway collapse on exhalation —> airway obstruction
7) alveoli trapping
8) decreased gas exchange
Emphysema - Pathophysiology (Alpha-1-Antitrypsin-Deficiency) (3)
1) decreased hepatic production of alpha-antitrypsin
2) decreased inhibition of neutrophil elastase
3) emphysema
Emphysema - Pathophysiology (Pink Puffer) (5)
1) airway collapse on exhalation —> airway obstruction
2) exhale slowly through pursed lips
3) increased airway pressure
4) prevent airway collapse
5) flushing and puffing
Emphysema - Symptoms (3)
1) productive cough (less than chronic bronchitis)
2) dyspnoea
3) cachexia (wasting syndrome: anorexia, weight loss, muscle atrophy, fatigue)
Emphysema - Signs (4)
1) pursed lips
2) barrel chest
3) use of accessory respiratory muscles
4) tachypnoea
Emphysema - Complications (4)
1) pneumothorax
2) type II respiratory failure
3) pneumonia
4) lung malignancy
Emphysema - Investigations (5/2)
initial 1) spirometry (FEV1<0.8, FEV1/FVC<0.7) 2) pulse oximetry (low) 3) ABG (PaO2<8kPa ± PaCO2>6.7kPa) 4) FBC (normal) 5) ECG (normal) consider 1) chest x-ray (hyperinflation, bullae) 2) alpha-1-antitrypsin level
Emphysema - Management (3/5/0)
conservative
1) smoking cessation
2) pulmonary rehabilitation (exercise, education, breathing techniques)
3) vaccinations (annual influenza, pneumococcal)
medical
1) LAMA (+ LAβA in persistent dyspnoea)
2) SAβA (as required)
3) INH corticosteroid (severe)
4) long term domiciliary oxygen therapy (severe, non-smoker)
5) alpha-1-antitrypsin replacement (deficiency)
Asthma - Description
chronic airway inflammation characterised by airway obstruction and hyperresponsiveness
Asthma - Causes (7)
1) genetic (ADAMS-33)
2) atopy (eczema, atopic dermatitis, allergic rhinitis)
3) family history (inc. atopy)
4) clean childhood environment
5) smoking (inc. passive, e.g. maternal smoking)
6) obesity
7) gastro-oesophageal reflux disease
Asthma - Risk Factors (9)
1) allergen
2) pollution
3) dust
4) occupation (e.g. wood dust, bleaches, dyes, latex)
5) cold air
6) exercise
7) emotion
8) NSAID
9) βB
Asthma - Pathophysiology (Acute Exacerbation) (14)
1) inhalation of allergen
2) allergen activates dendritic cells
3) dendritic cells attract and activate t helper 2 cells
4) t helper 2 cells activate plasma cells
5) plasma cells produce IgE
6) IgE bind to mast cells
7) allergen binds to IgE/mast cell complex
8) mast cell releases histamine
9) histamine causes 1st wave bronchoconstriction and inflammation (after minutes)
10) t helper 2 cells activate eosinophils
11) eosinophils release major basic protein
12) major basic protein induces mast cell histamine release
13) histamine causes 2nd wave of bronchoconstriction and inflammation (after hours)
14) re-inhalation of allergen recurs process
Asthma - Pathophysiology (Chronic Remodelling) (4)
1) goblet cell metaplasia —> increased mucus
2) mast cell hyperplasia —> increased histamine
3) smooth muscle hypertrophy —> airway narrowing
4) basement membrane thickening —> airway narrowing
Asthma - Pathophysiology (Asthmatic Triad) (3)
1) airway obstruction
2) airway hyperresponsiveness
3) airway inflammation
Asthma - Symptoms (4)
1) dyspnoea
2) wheeze
3) dry irritating cough
4) cachexia (wasting syndrome: anorexia, weight loss, muscle atrophy, fatigue)
Asthma - Signs (4)
1) symptoms worse at night
2) use of accessory respiratory muscles
3) hyperinflated chest
4) hyperresonant percussion
Asthma - Signs (Severe Attack) (3)
1) tachypnoea
2) tachycardia
3) inability to complete sentences in one breath
Asthma - Signs (Life-Threatening Attack) (3)
1) cyanosis
2) bradycardia
3) silent chest (inability to generate enough airflow to wheeze due to fatigue/exhaustion)
Asthma - Complications (4)
1) respiratory tract infection
2) pneumonia
3) pneumothorax
4) type II respiratory failure
Asthma - Investigations (3/4)
initial 1) peak expiratory flow (low) —> bronchodilator test peak expiratory flow (>15% improvement) 2) spirometry (FEV1<0.8, FEV1/FVC<0.7) —> bronchodilator test spirometry (>15% improvement) 3) pulse oximetry (attack) consider 1) chest x-ray (exclusion) 2) specific IgE assay 3) skin prick test 4) ABG (attack)
Asthma - Management (3/6/0)
conservative 1) avoid allergen 2) inhaler technique 3) vaccinations (influenza) medical 1) SAβA (as required) 2) + LAβA 3) + INH corticosteroid (beclometasone) (increase dose as required) 4) PO corticosteroid (prednisolone) (severe) 5) montelukast (consider if severe) 6) theophylline (consider if severe)
Asthma - Management (Attack) (5)
1) NEB SAβA
2) PO corticosteroid (prednisolone)
3) oxygen therapy (severe)
4) anti-ACh (ipatropium) (severe)
5) magnesium (severe)
Small Cell Lung Carcinoma - Description
malignant proliferation of lung neuroendocrine cells
Small Cell Lung Carcinoma - Risk Factors (6)
1) 65-70 years old
2) family history
3) smoking (inc. passive)
4) chronic obstructive pulmonary disease
5) occupational (asbestos, coal)
6) radon gas
Small Cell Lung Carcinoma - Symptoms (6)
1) cough
2) chest pain
3) haemoptysis
4) dyspnoea
5) weight loss
6) fatigue
Small Cell Lung Carcinoma - Complications (7)
1) metastasis (adrenal gland, liver, brain, bone)
2) pneumonia
3) pleural effusion
4) paraneoplastic syndrome (10%)
5) recurrent laryngeal nerve palsy
6) phrenic nerve palsy
7) superior vena cava syndrome
Small Cell Lung Carcinoma - Complications (Paraneoplastic Syndrome) (4)
1) PTH —> hypercalcaemia
2) ADH —> SIADH
3) ACTH —> Cushing’s syndrome
4) VEGF —> hypertrophic pulmonary osteoarthropathy
Small Cell Lung Carcinoma - Investigations (3/2)
initial
1) chest x-ray (central mass, pleural effusion, hilar lymphadenopathy)
2) chest CT
3) sputum cytology (malignant cells) (high false negatives)
consider
1) bronchoscopy + biopsy
2) adrenal, liver, brain, bone CT (metastasis)
Small Cell Lung Carcinoma - Staging (TNM) (4/4/2)
tumour
T1) <3cm
T2) >3cm
T3) invades chest wall, pericardium, phrenic nerve
T4) invades mediastinum, heart, great vessels, trachea, oesophagus, vertebrae, carina, recurrent laryngeal nerve
node
N0) no nodes
N1) ipsilateral hilar nodes
N2) ipsilateral mediastinal nodes, subcarinal nodes
N3) contralateral hilar or mediastinal nodes, supraclavicular nodes
metastasis
M0) no metastasis
M1) distant metastasis
Small Cell Lung Carcinoma - Management (0/3/1)
medical 1) chemotherapy 2) radiotherapy 3) prophylactic cranial irradiation surgery 1) surgical excision (e.g. lobectomy) (rare due to late presentation)
Non-Small Cell Lung Carcinoma - Description
malignant proliferation of lung cells
Non-Small Cell Lung Carcinoma - Risk Factors (6)
1) 65-70 years old
2) family history
3) smoking (inc. passive)
4) chronic obstructive pulmonary disease
5) occupational (e.g. asbestos, coal)
6) radon gas
Non-Small Cell Lung Carcinoma - Symptoms (6)
1) cough
2) chest pain
3) haemoptysis
4) dyspnoea
5) weight loss
6) fatigue
Non-Small Cell Lung Carcinoma - Complications (7)
1) metastasis (adrenal gland, liver, brain, bone)
2) pneumonia
3) pleural effusion
4) paraneoplastic syndrome (10%)
5) recurrent laryngeal nerve palsy
6) phrenic nerve palsy
7) superior vena cava syndrome
Non-Small Cell Lung Carcinoma - Complications (Paraneoplastic Syndrome) (4)
1) PHT —> hypercalcaemia
2) ADH —> SIADH
3) ACTH —> Cushing’s syndrome
4) VEGF —> hypertrophic pulmonary osteoarthropathy
Non-Small Cell Lung Carcinoma - Investigations (3/2)
1) chest x-ray (central mass, pleural effusion, hilar lymphadenopathy)
2) chest CT
3) sputum cytology (malignant cells) (high false negatives)
consider
1) bronchoscopy + biopsy
2) liver, adrenal, brain, bone CT (metastasis)
Non-Small Cell Lung Carcinoma - Staging (TNM) (4/4/2)
tumour
T1) <3cm
T2) >3cm
T3) invades chest wall, pericardium, phrenic nerve
T4) invades mediastinum, heart, great vessels, trachea, oesophagus, vertebrae, carina, recurrent laryngeal nerve
node
N0) no nodes
N1) ipsilateral hilar nodes
N2) ipsilateral mediastinal nodes, subcarinal nodes
N3) contralateral hilar or mediastinal nodes, supraclavicular nodes
metastasis
M0) no metastasis
M1) distant metastasis
Non-Small Cell Lung Carcinoma - Management (0/2/1)
medical 1) chemotherapy 2) radiotherapy surgery 1) surgical excision (e.g. lobectomy)
Pulmonary Embolism - Description
embolus blocks pulmonary arterial circulation
Pulmonary Embolism - Cause (6)
1) deep vein thrombosis rare 2) right ventricular thrombosis (post MI) 3) septic emboli (right IE) 4) fat emboli (fracture) 5) air emboli 6) amniotic fluid emboli
Pulmonary Embolism - Risk Factors (Change in Blood Flow) (4)
1) surgery
2) leg fracture —> plaster of Paris
3) long haul flights
4) obesity