Asthma and drugs Flashcards
What causes asthma? 6
Inherited Modern lifestyles Smoking during pregnancy Environmental pollution Viral infection Irritants found in the workplace
How many asthmatics are there in the UK?
5.4 million
What proportion of adults and children have asthma?
1 adult in 12
1 child in 11
What four presentations can an asthmatic present?
Moderate
Severe
Life threatening
Near fatal
What must we be aware of when being told a patient has asthma?
Asthma is rare in the older population so Particularly in older patients asthma is often mis diagnosed. Many symptoms may point to asthma but in fact be another respiratory conditions.
What signs present a moderate asthma attack?
Talking in sentences SPO2>92% PEFR>50% best or predicted (peak expiratory flow rate) Heart rate 5 Resp rate 5
What signs present an acute asthma attack?
Can’t complete sentences in 1breath or too breathless to talk or feed.
SPO2 140/min ages 2-5 >125/min aged >5
Resp rate >40/min ages 2-5 >30/min aged >5
What signs present a life threatening asthma attack?
Silent chest
Cyanosis
SPO2
What is Aetiology?
The study of the cause of a disease
What is pathophysiology?
Study of the progress of the disease
How does asthma progress.. 6steps.
Airways almost continuously sensitive and inflamed
Trigger causes bronchospasm
Inflammation increases and mucus secreted.
Bronchial muscles.
Hyperinflation (of the lungs) can breath in but can’t breath out.
Reduction in tidal volume.
What cells secrete mucus?
Goblet cells
What causes the asthma expiratory wheeze.
Hyperinflation.
Define hyperinflation.
…
What triggers asthma? 8
Pollen Cigarette smoke Dust mites Pets Mould Exercise Stress Sudden change in temperature.