Asthma Flashcards
The classic symptoms of asthma
- Wheezing
- SOB
- Chest tightness
- Cough
Asthma is a clinical syndrome characterized by:
- Airway obstruction
- airway inflammation
- airway hyperresponsiveness
The mast cells degranulate rapidly (within 30 minutes), releasing multiple mediators
including:
leukotrienes
histamine
prostaglandins
platelet activating factor
PFTs may be normal in asymptomatic patients with asthma, but more commonly they reveal some degree of airway obstruction manifested by a decreased;
FEV1 and FEV1/FVC ratio
Elevated values of ______________
can also be used to support the diagnosis of asthma when eosinophilic inflammation is present.
exhaled nitric oxide
The most commonly used stimulus for bronchoprovocation
Metacholine
The generally accepted criterion for hyperresponsiveness is a decrease in
____ by ___ or more below the
baseline value after inhalation of methacholine
FEV1 by 20%
A patient experiencing an acute asthma attack usually has a _____________ as a result of hyperventilation
low PaCO2
It is recommended as part of the initial assessment of all patients being evaluated for asthma and periodically thereafter as needed.
Spirometry
NAEP guidelines also recommend that home
_______ measurement be used for patients with moderate to severe asthma.
PEFR (Peak Expiratory Flow Rate)
help to relieve asthma symptoms:
Bronchodilators such as β-2–adrenergic agonists and anticholinergics
NAEP asthma guidelines recommend
that __________ should be considered as adjunctive therapy for patients with severe persistent asthma
omalizumab
For status asthmaticus, ___________________ can be combined with bronchodilator therapy.
heliox (mixture of helium and O2)