ALS Lecture 7 - Pharmacology of Airways Obstruction DONE Flashcards
classic asthma starts in
childhood
classic asthma gives
bronchoconstriction
classic asthma has a
double reaction
1st asthma response
starts after 15mins of allergen, ends in ~15mins without treatment
2nd asthma response
75% is late reaction, more difficult to treat
asthma is characterised by
eosinophils
label the diagram of asthma pathophysiology
done
asthma pathophysiology (5 steps)
- IgE directed against allergen
- IgE produced by B lymphocyte, sticks onto mast cells
- degranulation of mast cells and inflammatory mediators
4, bronchospasm, vasodilation, mucus secretion, oedema
asthma inflammation causes
mucus plugs to block airways
asthma histology of airway
filled with mucus, nuclei of inflammatory cells
eosinophils stain and how up
pink, stained with eosin
asthma medication types (5)
SABA, LABA, corticosteroids (inhaled), leukotriene receptor antagonist, combination inhalers
bronchoconstriction is mediated by
smooth muscle contraction, beta agonists reverse this
action of beta receptors on smooth muscle (3 steps)
- stimulated
- release cAMP
- relax smooth muscle
label the diagram of montelukast combined with a steroid affects the dual pathways of inflammation
done
short acting beta agonist (SABA) example
Salbutamol, 4-5hrs
long acting beta agonist (LABA) example
Salmetrol, Formoterol, 12-24hrs
leukotriene receptor antagonist MOA (2 steps)
- block leukotriene receptors
2. stop eosinophil recruitment