FEV1
how much air can be forcefully exhaled in one second
FVC
after taking a deep breath, the maximum volume of air that is exhaled (how much air is exhaled)
FEV1/FVC
the percentage of total air compacity that can be forcefully exhaled in one second
guidelines
classification of asthma severity
step 1
daytime symptoms: <2x months
nighttime awakenings: none
classification of asthma severity
step 2
daytime symptoms: >=2x month but <= 4-5 days/week
nighttime awakenings: none
classification of asthma severity
step 3
daytime symptoms: most days
nighttime awakenings: >1x/week
classification of asthma severity
step 4
daytime symptoms: daily
nighttime awakenings: >=1x/week
Low-dose ICS + formoterol (combo ihnaler)
inhaled short-acting beta2 agonists
systemic steroids
injection used during exacerbation
oral: used during an exacerbation or for severe asthma that is difficult to control with other combo drugs
inhaled EPI
OTC, can be used intermittently for acute tx of mild asthma only
not included in guidelines
inhaled short-acting muscarinic antagonists (SAMAs), also called inhaled anticholinergics
used in combo w/ SABA during exacerbations
inhaled corticosteroids (ICS)
1st line for all pt w/ persistent asthma, the most effective anti-inflammatory drugs
inhaled long-acting beta2 agonists (LABAs)
oral leukotriene receptor antagonists (LTRAs)
alternative to LABA in combo w/ ICS, can be added on ICS/LABA tx
most commonly used in children
theophylline (oral or IV)
least desirable opt for add-on, due to adverse effects and drug interactions and the need to monitor serum drug concentrations
inhaled long-acting muscarinic antagonists (LAMAS), also called inhaled anticholinergics
can be used as add-on tx in pt w/ history of exacerbations despite ICS/LABA tx
injectable monoclonal antibodies (SC or IV)
add-on in pt w/ persistent severe asthma of a specific type:
omalizumab: for severe allergic asthma
mepolizumab, reslizumab, bevacizumab, and dupilumab: for severe eosinophilic asthma
step 1
rescue inhaler
as needed low- low- dose ICS- formoterol
or
SABA + low- lose dose ICS (take together)
step 2
rescue inhaler
as needed low-dose ICS-formoterol
or
rescue inhaler
SABA
+
maintenance inhaler
low- dose ICS
step 3
rescue inhaler
low-dose ICS-formoterol
+
maintenance inhaler
low-dose ICS-formoterol
or
rescue inhaler
SABA
+
maintenance inhaler
low dose ICS- LABA
step 4
rescue inhaler
low-dose ICS-formoterol
+
maintenance inhaler
medium-dose ICS-formoterol
or
rescue inhaler
SABA
+
maintenance inhaler
medium- dose ICS- LABA
step 5
rescue inhaler
low-dose ICS-formoterol
+
maintenance inhaler
high-dose ICS-formoterol
or
rescue inhaler
SABA
+
maintenance inhaler
high- dose ICS- LABA