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Bronchitis - Coggle Diagram
Bronchitis
Clinical features
Cough
Dry → productive
Worse at night
Sputum
Clear
Yellow/green
Occasionally blood‑streaked
Breathing symptoms
Wheeze
Chest tightness
Mild dyspnoea
Systemic
Low‑grade fever
Fatigue
Myalgia
Exam findings
Rhonchi
Wheeze
No focal consolidation
Management
Smoking cessation
Referral to services
Brief intervention
Frailty‑specific
Early review if deterioration
Monitor hydration
Safety‑netting
Antibiotics
High‑risk groups
Only if bacterial features
Symptomatic
Cough suppressants (short‑term)
Bronchodilators (if wheeze)
Supportive
Antipyretics
Analgesia
Rest
Hydration
Aetiology
Viral causes
Influenza
Parainfluenza
RSV
Rhinovirus
Coronavirus
Bacterial causes
Mycoplasma pneumoniae
Bordetella pertussis
Secondary bacterial infection
Environmental/irritant
Smoking
Pollution
Chemical fumes
Dust
Other
Allergic triggers
Post‑viral hyperreactivity
Pathophysiology
Inflammation
Bronchial mucosa oedema
Hyperaemia
Mucus production
Goblet cell hyperplasia
Thick sputum
Airway narrowing
Smooth muscle constriction
Mucus plugging
Impaired clearance
Reduced ciliary function
Cough reflex activation
Risk factors
Lifestyle
Smoking
Vaping
Medical
COPD
Asthma
Immunosuppression
Heart failure
Environmental
Occupational exposure
Cold weather
Viral season
Frailty‑specific
Reduced reserve
Poor hydration
Baseline lung disease
Red flags
Respiratory
Hypoxia
Severe breathlessness
Haemoptysis
Infection
High fever
Rigors
Toxic appearance
Complications
Suspected pneumonia
Chest pain
Frailty
Delirium
Functional decline
Reduced oral intake
Investigations
Bedside
Obs + NEWS2
Peak flow (if wheeze/asthma)
Laboratory
CRP
Viral PCR
Sputum culture
Imaging
CXR only if red flags
Rule out pneumonia
Frailty‑specific
Hydration status
Collateral history
Differentials
Infective
Pneumonia
Pertussis
Influenza
COVID‑19
Airway
Asthma exacerbation
COPD exacerbation
Cardiac
Heart failure
Other
PE
Post‑nasal drip
GERD‑related cough
Prevention
Lifestyle
Smoking cessation
Avoid irritants
Vaccination
Flu
COVID
Chronic disease optimisation
COPD management
Asthma control
General
Hand hygiene
Reduce viral exposure
Definition
Acute bronchitis
Short‑term inflammation
Usually viral
Self‑limiting
Chronic bronchitis
Productive cough ≥3 months/year for ≥2 years
COPD spectrum
Inflammation site
Bronchi
Bronchioles (sometimes involved)
Antibiotic indications
Clinical
High fever
Purulent sputum
Symptoms >3 weeks
Risk groups
Frailty
COPD
Immunosuppression
Evidence of bacterial infection
Elevated CRP
Focal chest signs
Systemic unwellness
Complications
Respiratory
Pneumonia
COPD exacerbation
Asthma flare
Functional
Reduced mobility
Fatigue
Frailty
Delirium
Dehydration
Loss of independence
Prognosis
Acute
Self‑limiting
2–3 weeks
Chronic
Progressive
COPD spectrum
Frailty
Longer recovery
Higher risk of complications