Chapters 73 & 74 Flashcards
Perfusion
Ventilation
Blood flow through the lungs
Air moving through the lungs
Sympathetic branch of ANS
Relaxes smooth muscle of bronchioles
Increases diameter of airway
Bronchodialates, relaxing smooth muscle
Parasympathetic branch of ANS
Contracts smooth muscle of bronchioles
Narrows diameter of airway, decrease lumen
Bronchoconstricts
Asthma
Bronchospasm
Inflammation
COPD (chronic obstructive pulmonary disease)
Emphysema
Chronic Bronchitis
Beta Adrenergics (primary treatment for asthma)
Beta 1
Beta 2
Beta 1 receptors found in heart
Beta 2 receptors found in lungs and other organs
Non selective Bronchodialators
Selective agents
Non act on both beta 1&2
Selective act on only 1 or 2. (prescribed more often, minimal effect on heart)
Beta 2 Adrenergic agonist (used most)
Relaxes bronchial smooth muscle resulting in Bronchodialation
Meds either long or short acting
Short-terminates attack
Long-prevention, used routinely
Used by inhalation of Meds by inhalers or nebulizer
Prototype Beta 2 Adrenergic agonist-
Adverse effects-
Albuterol: Short acting (rescue inhaler)
Adverse effects- tachycardia, headache, throat irritation, nervousness, restless, insomnia
Albuterol contraindications
Tachydysrhythmia
Coronary artery disease
HTN
Drug interaction:
Use with beta blockers, MAOI, thyroid replacement therapy
Albuterol nursing interventions
Rinse mouth
Asses VS before and after use
Asses lungs
Limit caffeine and nicotine
Anticholinergics
Prevention of bronchospasm, not rescue
Atrovent
Blocks parasympathetic nervous system to stimulate sympathetic
Bronchodialates by blocking cholinergic receptors in bronchial smooth muscle.
Prototype Anticholinergic-
Adverse effect-
Atrovent
Adverse effects: Can worsen glaucoma Dry mouth, nausea Life threatening paradoxical acute bronchospasm Bitter taste in mouth (common)
*contraindication: do not use with other Anticholinergics
Nursing interventions when using Atrovent
Treat to report lack of improvement or increasing severity of bronchospasm
Asses for history of glaucoma
Use for prevention not attack
Not for children under 12
Inhaled corticosteroid
Most effective
Decreases inflammation
Inhibits synthesis and release of inflammatory mediators:
Histamine, leukotrienes, cytokines, prostaglandins (these cause edema & mucus in airway