NCLEX RN Practice Question # 728
NCLEX Examination.
Practice Question # 728.
NCLEX Examination.
Uses of Bronchodilator
Relief of bronchospasm occurring during anesthesia and in bronchial asthma, bronchitis, emphysema.
ACTION
Inhaled corticosteroids: Exact mechanism unknown. May act as anti-inflammatories, decrease mucus secretion.
Beta2-adrenergic agonists: Stimulate beta receptors in lung, relax bronchial smooth muscle, increase vital capacity, decrease airway resistance.
Anticholinergics: Inhibit cholinergic receptors on bronchial smooth muscle (block acetylcholine action).
Leukotriene modifiers: Decrease effect of leukotrienes, which increase migration of eosinophils, producing mucus/ edema of airway wall, causing bronchoconstriction.
Methylxanthines: Directly relax smooth muscle of bronchial airway, pulmonary blood vessels (relieve bronchospasm, increase vital capacity). Increase cyclic 3,5-adenosine monophosphate.