Asthma
- General information
- Obstructive disease of the lower respiratory tract
- Most common chronic respiratory disease in children, in younger children affects twice as many boys as girls; incidence equal by adolescence
- Often caused by an allergic reaction to an environmental allergen, may be seasonal or year round
- Immunologic/allergic reaction results in histamine release, which produces three main airway responses
- Edema of mucous membranes
- Spasm of the smooth muscle of bronchi and bronchioles
- Accumulation of tenacious secretions
- Status asthmaticus occurs when there is little response to treatment and symptoms persist
- Medical management
- Drug therapy
- Bronchodilators to relieve bronchospasm
- Beta-adrenergic agents: rapid onset of action when administered by aerosol (see Figure 5.3 below)
- theophylline: check pulse and blood pressure
- Corticosteroids to relieve inflammation and edema
- Antibiotics: if secondary infection
- Cromolyn sodium: not used during acute attack; inhaled; inhibits histamine release in lungs and prevents attack
- Physical therapy
- Hyposensitization
- Exercise
- Assessment findings
- Family history of allergies
- Client history of eczema
- Respiratory distress: shortness of breath, expiratory wheeze, prolonged expiratory phase, air trapping (barrel chest if chronic), use of accessory muscles, irritability (from hypoxia), diaphoresis, change in sensorium if severe attack
- Diagnostic tests: ABGs indicate respiratory acidosis
- Nursing interventions
- Place client in high-Fowler's position.
- Administer oxygen as ordered.
- Administer medications as ordered.
- Provide humidification/hydration to loosen secretions.
- Provide chest percussion and postural drainage when bronchodilation improves.
- Monitor for respiratory distress.
- Provide client teaching and discharge planning concerning
- Modification of environment
- ensure room is well ventilated.
- stay indoors during grass cutting or when pollen count is high.
- use damp dusting.
- avoid rugs, draperies or curtains, stuffed animals.
- avoid natural fibers (wool and feathers).
- Importance of moderate exercise (swimming is excellent)
- Purpose of breathing exercises (to increase the end expiratory pressure of each respiration)
FIGURE 5.3 Instructions for use of an oral inhaler
Tuesday, May 20, 2008
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Labels:
respiratory disorder
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This entry was posted on Tuesday, May 20, 2008
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respiratory disorder
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