Asthma ☺️ Flashcards
Presentation/Symptoms
Chest tightness Dry cough SOB Tripod position Worse at night/early morning Worse post exercise, NSAID, Bb use
Signs
Expiratory wheeze Hyperresonance on percussion Hyperinflated chest Tachyapnoea Silent chest
Risk factors
Part of atopic triad -Allergic rhinitis -Eczema -Asthma FHx Smoking Frequent chest infections Exposure to triggers at work
Pathophysiology
Reversible obstructive respiratory disorder
- bronchial SM contraction
- mast cell degranulation => inflammation
- mucous hypersecretion
Epidemiology
Young people
Females more than males
Differentials
-VITAMIN CDEF
Vascular
- heart failure => orthopnea, edema, IHD, fine creps
- PE => acute SOB, pleuritic pain, pleuritic rub, Wells score
Iatrogenic/idiopathic
-GERD => cough, postural/food related, vomiting
Autoimmune
-ILD => dry cough, fine creps, clubbing
Infective/inflammatory
- Bronchiectasis => coarse crepitations, freq chest infections, sputum
- TB => persistent productive cough, haemoptysis
Neoplastic
-lung cancer => persistent cough, haemoptysis, weight loss
Congenital
-Cystic fibrosis => persistent moist cough, GI symptoms, failure to thrive
Endocrine/environmental
- COPD => productive cough, smoking history
- ILD => dry cough, fine creps, clubbing
Functional
- Anxiety, panic attack
- Foreign body aspiration => stridor, reduced chest wall mv
Investigations
Diagnostic criteria
DEFINITIVE
Spirometry => obstructive pattern (<0.7), with reversibility after BD (12%+)
FeNO - higher than normal
Other options
Peak flow diary for 2-4wks => reduced lung capacity with variability
Treatment plan
- SABA (salbutamol)
- SABA + ICS (beclamethasone)
- SABA + ICS + LTRA (montelukast)
- SABA + ICS + LABA (salmeterol)
SE of SABA, ICS
SABA
-fine tremor
ICS
- oral candida
- stunted growth in children