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.

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